ABSTRACTS OF PAPERS

Department of Soil Science and Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore 641 003.

DOI: https://doi.org/10.37855/jah.2008.v10i02.21

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Abstract: To evaluate the efficacy of slow release NPK fertilizers in turmeric, two field experiments were conducted on a sandy clay loam soil. These slow release NPK fertilizers are new products in the form of tablets, mixtures and coated formulations, which contains all the three major nutrients in them. Five slow release NPK fertilizer sources were tested in comparison with straight fertilizers at three NPK levels viz., 75, 100 and 125 % of recommended dose in a randomized block design. The results clearly indicated that the wet rhizome yield significantly increased with increasing levels of NPK and when applied in the form of tablets. The N, P and K uptake both in shoot as well as rhizome of turmeric increased significantly up to 125 % of NPK level applied. The uptake was significantly higher in plots which received tablet form of slow release fertilizers than other fertilizer sources.

Graduated School of Agricultural and Life Sciences, University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan.

DOI: https://doi.org/10.37855/jah.2008.v10i02.22

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Abstract: Seedlings of three tomato cultivars, 'Reika', 'Marryroad' and 'First Power' were grown in either pots or plug trays in order to clarify the interaction effect of cultivar and root container size on the number of days to flowering and the number of leaves preceding the first inflorescence under different temperature regimens. The number of days to flowering was greater in seedlings raised in plug trays than those in pots, regardless of temperature regimen. Flowering was delayed at 23/18?C compared with 30/25?C for seedlings raised in either pots or plug trays. The number of leaves preceding the first inflorescence was greater in seedlings raised in plug trays than those in pots, except for 'Marryroad' at 23/18?C. Regardless of root container size, the number of leaves preceding the first inflorescence was greater in 'First Power' than in 'Reika' and 'Marryroad' at 30/25?C. These results suggest the importance of cultivar choice for the production of tomato seedlings with a small number of leaves preceding the first inflorescence using plug trays in cool conditions.

National Institute of Floricultural Science, Fujimoto, Tsukuba, Ibaraki 305-8519, Japan; Tokyo University of Agriculture, Funako, Atsugi, Kanagawa 243-0034, Japan.

DOI: https://doi.org/10.37855/jah.2008.v10i02.23

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Abstract: To establish a simple and rapid extraction method for soluble carbohydrate for determination of osmolar concentration in petals by HPLC analysis, a method using a centrifugal filter device with microwave heating was developed. Rose 'Sonia' petals were placed in a centrifugal filter device and heated in a microwave oven to boiling. The centrifugal filter device was centrifuged with the petals at 12,000 g for 10 min. The resulting leached solution was subjected to HPLC analysis. No significant difference in soluble carbohydrate composition was observed between the solution obtained from this method and that obtained from a conventional extraction method in which tissues are homogenized using hot ethanol solution. Changes in soluble carbohydrate concentration with flower opening in 'Rote Rose' roses were investigated using the new method. The osmolar concentrations of glucose and fructose in the petals increased during flower opening. This increase was roughly comparable to the increase in osmotic pressure in the petals. The results suggest that the method using the centrifugal filter device with microwave heating is a simple and rapid way to determine osmolar concentration of soluble carbohydrates of rose petals.

Faculty of Agriculture, Kagawa University, Miki, Kagawa 761-0795, Japan.

DOI: https://doi.org/10.37855/jah.2008.v10i02.24

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Abstract: The effects of root zone cooling on flower development and fruit set of 'Satohnishiki' sweet cherry were studied. Soil temperature in pots of the tree was maintained at approximately 11?C from bud burst until petal fall, then at about 15?C until harvest by circulating cooled water through a tube coiling the pots. Root cooling did not appreciably affect flower size, pollen germination and pollen tube elongation in pistils. However, the treatment prolonged ovule longevity and markedly increased the fruit set rate. These results suggest the possibility of applying root cooling to improve the fruit set of sweet cherries grown in warm regions.

Haramaya University, College of Agriculture, Department of Plant Science, P.O. Box 138, Dire Dawa, Ethiopia, Haramaya University, College of Agriculture, Department of Food Science and Postharvest Technology, P.O. Box 131, Haramaya, Ethiopia

DOI: https://doi.org/10.37855/jah.2008.v10i02.25

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Abstract: Field experiment was conducted to study effects of preharvest treatment of ComCat? spray, organic manure, NP fertilization and the combinations of ComCat? with the two forms of fertilizers on yield and chemical quality of tomato (Lycopersicon esculentum Mill.). Total and marketable yields were significantly influenced by the preharvest treatements. The result showed that the use of ComCat? and its combination with organic manure gave the highest total yield of 58.5 and 55.8 t ha^-1, respectively. At harvest, 94 and 93% of tomatoes subjected to preharvest ComCat? and ComCat? plus organic manure treatment were marketable, respectively. The chemical quality parameters tested such as total soluble solids, pH, titratable acidity, ascorbic acid, reducing sugar and total sugar were significantly (P<0.01) affected by the preharvest treatments. The study clearly demonstrated the importance of integerated agro-technology in order to simultaneously improve the yield and quality of tomatoes.

Department of Crop Science, Faculty of Agriculture, Universiti PutraMalaysia, 43400 UPMSerdang, Selangor, Malaysia.

DOI: https://doi.org/10.37855/jah.2008.v10i02.26

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Abstract: Papaya is a climacteric fruit, naturally fragile and cannot resist low temperature. Thus, prolonging the postharvest life of papaya fruit for long distance transportation is highly desirable to increase its commercialisation. 1-Methylcyclopropene (1-MCP) has been widely used to delay ripening and senescence of horticultural produces. The objective of this study was to determine characteristics of 'Eksotika' papaya treated with 1-MCP and optimum concentration of 1-MCP in prolonging postharvest life of papaya. Papayas were treated with 0, 10, 20, 30, 40 and 50 uL L" of 1-MCP for 7 days at 21?C/90% relative humidity (RH). Then, the fruits were allowed to ripen at 26?C/70% RH. 1-MCP did not affect L*, C*, soluble solids concentration, titratable acidity, pH, vitamin C and weight loss of papaya. The h^o and firmness of papaya treated with 30 uL L" of 1-MCP showed significant high values as compared to other concentrations. Similarly, visual quality evaluation also showed that fruits treated with 30 uL L" of 1-MCP retained green colour for 9 days and by day 13, no disease infection and shriveling was found in these fruits as compared to other concentrations. There is potential to prolong postharvest life of Eksotika papaya using 1-MCP.

Guilan University, Faculty of Agriculture, Horticultural Department, Rasht, Iran.

DOI: https://doi.org/10.37855/jah.2008.v10i02.27

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Abstract: A study of the nitrate uptake of Broccoli (Brassica oleraceae var. italica), grown with different amount of municipal solid waste compost (MSWC) was conducted in 2006 on open field at the University of Guilan, Rasht, Iran. The experiment was arranged in complete randomized block design with four treatments (0, 25, 50 and 100 Mg. ha^-1 MSWC) and four replications. The results revealed that under prevailing local conditions, total yield of the broccoli was higher when fertilized with MSWC and low when compost was not applied to the planted area. The plants with the highest compost application (100 Mg ha^-1) gave significantly highest yield at 37.03 Mg ha^-1 which was statistically different from other treatments. The significant differences were found also on marketable yield with an exception at lowest compost treatment. The lowest amount of nitrate (0.197 % in DM) in broccoli edible part was with application of 50 Mg. ha^-1 compost.

Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan.

DOI: https://doi.org/10.37855/jah.2008.v10i02.28

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Abstract: Three varieties of carrot (Daucus carota L.), 'Tokinashigosun', 'Hitokuchi' and 'Kurodagosun' were cultured hydroponically with rockwool blocks (56^8^30 cm high) in a greenhouse for 90 days. Two types of rockwool block, with holes and without holes were used in the study. Rockwool blocks with holes had seven rooting holes (10 cm in depth and 2.5 cm in diameter) 8 cm apart, which were filled with vermiculite for promoting root development. Rockwool blocks without holes were used as the control for comparison. Two rockwool blocks were placed side by side in a plastic box (58x18x18 cm high) and 14 plants were grown in each plastic box. The rockwool blocks were automatically sub-irrigated with a nutrient solution containing 35 ppm total N, 14 ppm P, 59 ppm K, 23 ppm Ca, 10 ppm Mg, 0.62 ppm Fe, 0.12 ppm Mn, 0.06 ppb B, 0.02 ppm Cu, 0.04 ppm Zn and 0.01 ppm Mo. The solution was added to the plastic boxes twice a day to keep the depth of the solution at 15 cm. The fresh and dry weights of the storage roots were 2 to 3 times greater in the rockwool blocks with holes than those without holes in each variety. The storage roots produced in the rockwool blocks with holes were 2 times longer than without holes in all the varieties. The diameter of storage roots was also greater in rockwool blocks with holes than without holes. Greater weights of the whole-plant and percent harvest index were obtained in the rockwool blocks with holes than in the without holes in all the varieties. Carbon dioxide concentration inside the rockwool blocks at a depth of 8 cm from the top surface and 1 cm beside the storage roots were lower in the rockwool blocks with holes (0.08%) than in the without holes (0.11%). Carbon dioxide gas diffusion coefficient in the rockwool media was greater in the rockwool blocks with holes than in the without holes. The hardness of the growing media was lower in the rockwool blocks with holes containing vermiculite than in the without holes. Therefore, better aerating conditions inside the rockwool blocks with holes containing vermiculite and lower hardness of the media would partly account for the better growth of storage roots in the rockwool blocks with holes than in the without holes in all the tested varieties.

Department of Plant Pathology, UAS, Dharwad-05, Department of Horticulture, UAS, Dharwad-05

DOI: https://doi.org/10.37855/jah.2008.v10i02.29

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Abstract: During summer 2005 out of 50 genotypes screened for tomato leaf curl virus under field conditions, none of the lines tested were resistant, however, six genotypes showed mild infection and nine genotypes showed moderate infection. In the second season, i.e., 2006 only Nandi and Vybhav showed moderate resistant reaction, along with the new commercial hybrids Hy-558, Hy-530, NS-563 and NS-719. The variety Vybhav was found superior over other varieties against the disease. The presence of virus in the symptomatic hosts was confirmed by ELISA and PCR. The plant height of the genotypes contributes to maximum extent (52.21 %) to the divergence followed by yield per plant and per cent disease incidence (10.86 % each), but the vector population contributed least (0.97 %). As a result of D² clustering, the commercial hybrids possessing lot of diversity fall in to four different clusters, cluster II had got six entries, cluster III 3 entries, cluster IV 6 entries and cluster V only one entry wheras cluster I had 50 entries.

Department of Plant Pathology, Faculty of Agriculture, University of Guilan, Iran; Center of Natural Resources research, Alborz- Karaj, Iran.

DOI: https://doi.org/10.37855/jah.2008.v10i02.30

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Abstract: Pseudomonas syringae pv. syringae causes canker, leafspots and necrosis of the bark of cherry, plum, and peach fruit trees. Symptoms caused by this pathogen on leaves, blossoms, and fruit, reported as common else where, are rare in Guilan cherry orchards. In this research, during survey from cherry, plum, and peach orchards in different areas of Guilan province (Talesh, Hashtpar, Astaneh-Ashrafieh and Lahijan), samples were taken from infected tissues of disease trees. For isolation of bacteria causing disease, infected tissue were crushed in bacteriological saline (0.85% w/v NaCl) and 100uL of juice was cultured on nutrient agar (NA) and King's B medium. Strains of bacteria rod-shaped, gram negative and aerobic bacterium were isolated. The strains produced Levan on media including sucrose. All strains made Hypersensitive Reaction (HR) on tobacco and geranium leaves. All of the isolated bacteria were oxidase, nitrate, tween 80 hydrolysis, indole and starch hydrolysis negative and could not rot potato tuber slices, produced H₂S, and grew at 36?C. The isolates could use citrate and urease. The isolates produced acid from sorbitol, galactose, myo-inositol, manitol, xylose, maltose and sucrose. Their gelatin test were positive. Based on morphological, physiological, biochemical, pathogenicity properties and total cellular protein profiles (SDS-PAGE), the predominate pathogenic type was identified as P. s. pv. syringae. This is the first report of the existence of P. s. pv. syringae on stone fruit trees in Iran.

F.C.A (UNMDP)-E.E.A.INTA, Balcarce, Agronomy Department, c.c.276,7620 Balcarce, Buenos Aires province, Argen?tina

DOI: https://doi.org/10.37855/jah.2008.v10i02.31

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Abstract: In the 2004 and 2005 seasons, experiments were carried out at INTA Balcarce, Argentina on potato cultivars Kennebec, Innovator and Shepody, with different susceptibility to Rhizoctonia solani Kuehn. A randomized block design with four replications was created. Visual observations during the crop cycle were carried out in order to record the number of healthy and infected plants, with symptomatology of stem canker produced by R. solani. After harvest, the potatoes in each block were washed and weighted, the total yield recorded and the marketable and "seed" potatoes were classified into healthy, cracked or malformed tubers. The best results on the reduction of infected plants were obtained with the highest dose of fluazinam (as Frowncide 50SC) and pencycuron (as Monceren 25SC). Commercial and "seed" tuber yields in the Spunta cultivar showed no significant differences among treatments, but with the Shepody cultivar, when the severity of the disease was high (2004) both fungicide treatments surpassed the untreated check. When the severity of the disease was low (2005), all chemical treatments registered higher commercial and "seed" tubers yields than the untreated check. In Kennebec and Spunta cultivars, all the treatments - except the lowest dose of fluazinam - accomplished a higher quantity of healthy tubers and surpassed the untreated check; although only the highest doses showed the highest yield of healthy tubers, showing a positive relationship with respect to the applied dose. Only the highest doses of fluazinam considerably reduced diseased tuber incidence in comparison to the untreated check.

Plant Physiology and Biotechnology Laboratory, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia.

DOI: https://doi.org/10.37855/jah.2008.v10i02.32

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Abstract: The study was carried out to investigate the effect of ethanol (ET) at different concentrations on longevity and senescence delay in bougainvillea flowers. The treatments were water (control), 2, 4, 8, 10, 20, 30, 40, 50 and 70% ET. Positive response was found in case of 4, 8 and 10% of ET after a certain period of treatment application. Dry weight was higher in lower concentrations of ethanol and lower in higher concentrations. Flower longevity was 2 days longer in 4, 8 and 10% ET than in water control and other concentrations of ethanol. Petal wilting and abscission occurred 2 days later in 4, 8 and 10% ET than in control. Perianth abscission also appeared 2 days later in 4, 8 and 10% ET than in control. However, petal discoloration (color change) was later in control, 2, 4, 8 and 10% than in 20, 30, 40, 50 and 70% ET. The results showed that flower vase life was significantly affected by ethanol concentrations as well as longevity was longer in 4, 8 and 10% ET than in water control and other concentrations.

Department of Horticultural Sciences, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran.

DOI: https://doi.org/10.37855/jah.2008.v10i02.33

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Abstract: The purpose of this study was to investigate the effect of exogenous putrescine on postharvest life and quality of sweet cherry fruit, cultivar "Surati-e Hamedan" at 2?C. Fruits were treated with 0.5, 1, 2, 3 and 4 mM putrescine as well as distilled water (Control) for 10 minutes, then transferred into the fridge (2?C). The rate of ethylene production, weight loss, tissue firmness, soluble solids content, titratable acidity and pH of fruits were determined 5, 10, 15, 20 and 25 d after the beginning of storage. Parameters associated with ripening processes, including softening and loss of titratable acidity, significantly decreased by application of putrescine. Soluble solids content of cherries also increased by the putrescine treatment. In addition, cherries treated with higher concentrations of putrescine showed lower rate of ethylene production. Weight loss of the fruits was affected by putrescine in a concentration dependent manner, while putrescine did not affect pH of fruit juice.

Scientist, Department of Pomology, Dr. Y S Parmar University of Horticulture and Forestry, Solan, HP-173 230 India; Research Officer(R & D Agriculture), Rashtriya Chemicals & Fertilizers Lmited (GOI), Chembur, Mumbai-74, India.

DOI: https://doi.org/10.37855/jah.2008.v10i02.34

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Abstract: The present investigation was undertaken with the objective to find out the nutritional status of mango orchards cv. Dashehari located in north- western Himalayan region of India and to establish the relationship of soil microflora especially, arbuscular mycorrhizal (AM) fungi and Azotobacter with growth, fruit yield, and soil and leaf nutrient contents. The study revealed that the correlation between AM spore population and shoot extension growth, leaf area, fruit yield, available Cu and Zn content and leaf N, P, Cu, Zn and Mn contents was found to be positive and significant, whereas, the relationship with soil as well as leaf K content was negative but significant. Azotobacter count was positively and significantly correlated with fruit yield, soil organic carbon (OC) and leaf Fe content, while, it was negative and significant with leaf K content. The relationship of per cent root colonization with soil OC and available N content of orchard soil was found to be positive and significant, and with shoot extension growth, leaf area, fruit yield, electrical conductivity, available P, K, Cu, Zn and Mn content and P, K and Cu contents of leaf, it was negative but non-significant.

Department ofBiology, Faculty of Science, Addis Ababa University, P.O.Box 1176, Addis Ababa, Ethiopia; Leibniz Insti?tute of Plant Genetics and Crop Plant Research (IPK), Plant Reproductive Biology, Correnstrasse 3, D-06466 Gatersleben, Germany

DOI: https://doi.org/10.37855/jah.2008.v10i02.35

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Abstract: Effects of seed sterilization, storage time, and temperature as well as extent of seeding survival and establishment under glasshouse versus nursery conditions were studied for E. kebericho. Seeds sterilized for 9 and 5 minutes in 70 % ethanol and in 10% sodium hypochlorite, respectively, germinated best (95.2 ? 1.2%) on Murashige and Skoog medium, supplemented with 10 g L^-1 phytoagar. Further increases or decreases in sterilization time decreased germination percentage and increased contamination, respectively. Unsterilized seeds (control) were completely contaminated before the emergence of radicle as a result of fungal growth. Seed germination percentage declined with increasing storage time and dropped from 94.6 ? 0.4 % to 32.2 ? 1.2% in 15 months. 25 ^oC was an optimal temperature for best germination (94.6 ? 2.4%) of seeds. Seeds sown in pots containing a mixture of sand, nursery soil, and animal manure in a ratio of 0.5: 2.5: 0.5 respectively, germinated significantly (P< 0.05) compared to other soil ratios. Increase in sand or animal manure ratios decreased germination, while increase in nursery soil increased percentage and rate of germination. High percentage (96.0 ? 0.5%) germination was obtained with the seeds sown in nursery soil-surface mixed additives compared with the control. Seedlings of nursery bed origin survived best compared to those in vitro or pot origin seedlings. Ultimately, seedlings growth with vigorous and orthotropic developmental pattern was obtained under nursery conditions, compared to those in the glasshouse, which showed stunted and plagiotropic developmental pattern. The study found that seeds stored for less than 5 months, and at 25 ^oC, were the most suitable for in vitro and ex vitro propagation of E. kebericho.

Universidad Nacional de Mar del Plata. Argentina, Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET). Argentina.

DOI: https://doi.org/10.37855/jah.2008.v10i02.19

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Abstract: Changes in ascorbic acid contents, microbial population and sensory attributes of cut Romaine lettuce subjected to thermal shocks were investigated. Immersion of cut lettuce in the thermal baths produced reduction in the ascorbic acid contents between 190 and 300 g kg^-1, with the greater losses corresponding to the higher bath temperatures. However, the rate of ascorbic acid degradation during refrigerated storage was independent of the thermal treatment and all samples presented a sharp decrease during the first day of storage and a gradual decrease thereafter. Thermal shocks did not reduce the initial microbial population. During storage, an increment in microbial counts was observed, being more notorious in samples that had been exposed to the highest shock temperature (50 ?C). The thermal treatment at 50 ?C was the only one to delay the onset of midrib and edge browning up to four days of refrigerated storage. This midrib and edge browning was considered to the most relevant to the overall visual quality of the product.

Scuola Superiore S. Anna di Studi Universitari e di Perfezionamento, Piazza Martiri della Liberta 33, 56100 Pisa, Italia.

DOI: https://doi.org/10.37855/jah.2008.v10i02.20

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Abstract: The aim of the research was to study the morphological and histochemical evolution of the bud meristems of 'Lavinia' nectarine cultivar. Moreover, the effectiveness of Release LC (a gibberellin chemical compound) in controlling the rate of flower bud differentiation was also evaluated. During a two-year period, the Release LC was applied in postharvest to avoid problems of possible chemical residues on marketable fruits. To determine the effect of treatment, several biological parameters such as initial flower and vegetative bud number, flower bud drop, evolution of the flower bud phenological stages, rate of bloom and fruit set were recorded. To establish the floral differentiation stage, the meristematic apices were collected before and after treatment and microscopically observed. The thin sections were analysed using histological (apex size, developmental stages of meristematic apex, co-axial stage), and histochemical (RNA fluorescent staining) techniques. In 'Lavinia' cv., the critical phase of the meristematic apex evolution occurred from May to June (60 and 90 days after full bloom): the presence of triple apices increased rapidly, the co-axial phase was achieved, the width and height of the meristematic dome increased markedly and the RNA appeared by a weak staining. As regards the flower bud differentiation control by exogenous treatments with Release LC, the different results obtained in our experiments indicate that the efficacy of treatment strictly depends on the growth stage of a meristematic apex.

College of Agriculture, Ibaraki University, Ami, Ibaraki, 300-0393, Japan, Graduate School of Agricultural and Life Sciences, Bunkyo-ku, Tokyo, 113-8657, Japan.

DOI: https://doi.org/10.37855/jah.2008.v10i01.03

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Abstract: Fruit growth of the gynoecious cucumber 'NK x AN8' was measured non-destructively to clarify whether the presence of fruit at lower nodes caused the abortion of fruit at upper nodes. When only one fruit per plant was allowed to grow, fruit growth could be divided into two phases: slow exponential and fast exponential. Phase change from slow to fast occurred when cumulative temperatures (CTs) after anthesis reached 38 and 54?C d for pollinated and parthenocarpic fruit, respectively. The CT was calculated as the sum of the differences between daily temperatures and 5?C. When fruit at nodes 4 and above were allowed to grow, the first growth phase was prolonged. Furthermore, parthenocarpic fruit aborted frequently when the sum of the relative growth rate (RGR) with respect to the CT (the sum of RGRs) for fruit at lower nodes exceeded 0.1 g g^-1 (?C d)^-1. Pollination with pollen of the monoecious cucumber '028' strongly suppressed fruit abortion; a large number of fruits could develop to a commercial size even when the sum of RGRs for fruit at lower nodes exceeded 0.1 g g^-1 (?C d)^-1. These results suggested that fruit abortion is more related to the existence of actively growing fruit than to the absolute amount of dry mass accumulation in the fruit.

Central Institute of Medicinal and Aromatic Plants, Resource Centre, Allalasandra, Bangalore 560 065, India.

DOI: https://doi.org/10.37855/jah.2008.v10i01.04

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Abstract: In periwinkle (Catharanthus roseus), pink, white and red-eyed (white corolla with red centre) are three common corolla colours, which are due to epistatic interaction between two genes R and W. Violet corolla, which is not found commonly in natural populations, is reported to be due to another gene B which blues the pigment in pink genotypes (R- W-). Recently, another gene O and its allele O^m have been reported to determine two uncommon corolla colours, orange-red and magenta corolla, respectively. Since, the relationship between genes determining violet, orange-red and magenta corolla was not known, a strain possessing violet corolla and white eye (VI) was crossed with strains possessing orange-red corolla and white eye (OR) and magenta corolla and white eye (MJ-1) to study: (i) the relationship between genes involved in the production of violet, orange-red and magenta corolla, (ii) to study the possibility of producing novel corolla colours and (iii) to determine the validity of the gene interaction models proposed earlier. The F₁ plants of both crosses, VI x OR and VI x MJ-1, had violet corolla. The F₂ generation of the cross VI x OR segregated into plants with (i) violet corolla, (ii) pink corolla, (iii) orange-red corolla, and (iv) white corolla in the ratio of 45:12:3:4, while the progeny of the backcross F₁ x OR segregated into three types of plants, (i) violet corolla, (ii) pink corolla, and (iii) orange-red corolla in the ratio of 2:1:1. The F₂ generation of the cross VI x MJ-1 segregated into five kinds of plants viz., (i) violet corolla, (ii) pink corolla, (iii) magenta corolla, (iv) rose corolla, and (v) white corolla in the ratio of 144:48:12:36:16, while the progeny of the backcross, F₁ x MJ-1 segregated into four types of plants viz., (i) violet corolla, (ii) magenta corolla, (iii) rose corolla and (iv) pink corolla in the ratio of 1:1:1:1. The results suggested that genes involved B, R, W, O/O^m and J were inherited independently and that the gene B blued the corolla pigment in B-RRwwO- genotypes but not in B-RRwwO^m-jj and B-RRwwO^m-JJ genotypes. No new corolla colours were observed in the studied crosses due to the interaction between genes governing violet, orange-red and magenta corolla. The observed segregation for different corolla colours in the studied crosses was same as that expected from independent segregation and known interactions between the genes involved, validating the earlier proposed models.

Department of Plant Molecular Biology and Biotechnology, Centre for Plant Molecular Biology, Tamil Nadu Agricultural University, Coimbatore-641 003, Tamil Nadu, India, Department of Biochemistry, Centre for Plant Molecular Biology, Tamil Nadu Agricultural

DOI: https://doi.org/10.37855/jah.2008.v10i01.05

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Abstract: Tomato (L. esculentum Mill), a popular vegetable in tropics is an excellent source for vitamin A, C, carotenoids and other health related components. It tops the list of industrial crops because of its outstanding processing qualities. It is valued for both its fresh and processed forms. Biochemical analysis in different wild species, varieties and hybrids of tomato showed the wild species, Lycopersicon pimpinellifolium LA 1593 to be a rich source for lycopene specific genes. Partial cDNA of lycopene specific Phytoene desaturase gene TNAU P was isolated from L. pimpinellifolium LA 1593 by RT-PCR technique. Sequence analysis of the partial cDNA showed 99.6% similarity with already available Phytoene desaturase gene from L. esculentum. Also, the sequence showed considerable homology with Phytoene dehydrogenase, Zeta carotene desaturase and Phytoene desaturase genes from Gentian, Oryza, Momardica, citrus and pea. The high intensity of the amplified product in L. pimpinellifolium coupled with 99.6 % homology to L. esculentum inferred that the level of expression of Phytoene desaturase is more in L. pimpinellifolium. Isolation of Phytoene desaturase genes can be further exploited to produce transgenic plants with increased content of lycopene by transferring the genes from wild species to cultivars.

Graduate School of Agricultural Sciences, Tohoku University, Sendai 981-8555, Japan. Present address: GraduateSchool of Life and Environmental Sciences, Kyoto Prefectural University, Kyoto 606-8522, Japan.

DOI: https://doi.org/10.37855/jah.2008.v10i01.01

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Abstract: 'Lillipot' carnation, which is usually cultivated as a potted ornamental, was transformed with a cDNA for carnation 1-aminocyclopropane-1-carboxylate (ACC) oxidase. Two lines, which harbor an sACO transgene, had a vase life of cut flowers more than twice longer than that of the non-transformed (NT) control. Flowers of the long vase life lines senesced with discoloring and browning in petal margins, which is typical to ethylene-independent senescence in carnation flowers. They produced negligible amount of ethylene for the first 8 day, whereas flowers of the NT control showed a climacteric ethylene production with a maximum on day 3. Transcripts for DC-ACS1 and DC-ACO1 were absent in petals of the long vase life flowers undergoing senescence. The present study revealed that transformation with sACO transgene may be useful to generate potted carnation plants with a long display time.

Faculty of Horticulture, Chiba University, Matsudo, Chiba 271-8510, Japan.

DOI: https://doi.org/10.37855/jah.2008.v10i01.06

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Abstract: Hypericin and pseudohypericin are the major bioactive constituents of floral parts of Hypericum perforatum L., mainly used for the treatment of neurological disorders and depression. The principle objective of the current study was to evaluate the effect of blue, blue and red mixed, and red light on flowering time and concentration of hypericin, pseudohypericin and hyperforin in the floral tissues of H. perforatum plants. The results revealed that red light promoted flowering and production of the three major medicinal components, indicating the influence of spectral characteristics of light on flowering of H. perforatum plants. Spectral quality of light was found to be an important factor in controlling the flowering of H. perforatum plants.

Department of Horticulture, Clemson University, Clemson, SC 29634-0375 USA; Coastal Research and Education Center, Charleston, SC 29414-5332 USA; Department of Packaging Sciences, Clemson University. Clemson, USA; Department of Plant Pathology and Physiol

DOI: https://doi.org/10.37855/jah.2008.v10i01.07

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Abstract: Feverfew (Tanacetum parthenium [L.] Schultz-Bip., Asteraceae) products have shown high variability in the market. The objective of this study was to determine whether environmental factors affect the composition of key phytochemicals in feverfew. Plants of feverfew were exposed to water stress in greenhouse and commercial field conditions. The highest yield of parthenolide (PRT) was found in plants that received reduced-water regimes. Phenolics concentration was higher in plants grown under adequate-water conditions. The effect of time of harvest on PRT concentration and phenolics content was also investigated. Increased PRT was found during afternoon hours whereas total phenolic compounds decreased during the photoperiod and increased at night. When plants were exposed to artificial light during night hours, the phenolics content remained low. Our results revealed that manipulating the environment to favour increased accumulation of PRT resulted in a decline of phenolics content in feverfew. These findings have implications on standardization of herbal products.

Department of Agriculture, University of Arkansas at Pine Bluff, Pine Bluff, AR 71601, USA.

DOI: https://doi.org/10.37855/jah.2008.v10i01.08

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Abstract: Cowpea is a highly recalcitrant nutrient-rich leguminous vegetable crop. Efforts to genetically transform cowpea with insect-resistant genes remains a challenging task due to lack of an efficient regeneration system. We have established an efficient regeneration system in cowpea through shoot meristem. Shoot meristems were isolated from embryos that were precultured for 3-5 days on Murashige and Skoog (MS) medium containing 8.9 uM benzylaminopurine (BA). The isolated shoot meristems were cultured on MS medium containing 0.89 uM BA. After 3-4 weeks, multiple shoots were separated from the explant and cultured on half-strength MS medium for elongation and rooting. More than 90% of the regenerants formed roots. The rooted plantlets were transferred first to peat pellets and subsequently to the greenhouse. The plants were allowed to flower and set seed. The efficiency of regeneration in all four cultivars ranged from 76-87%, demonstrating a significant improvement over the published protocols (1-32%). At least six to seven plantlets were obtained from each meristem. The protocol using shoot meristems is simple, efficient, rapid and genotype-independent and may be amenable for transformation through particle bombardment.

Plant Tissue Culture Division, CSIR National Chemical Laboratory, Pune - 411 008, India

DOI: https://doi.org/10.37855/jah.2008.v10i01.09

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Abstract: Grapevine genotypes differ in tissue culture requirements and thus require optimized culture conditions for in vitro propagation. Single node segments of Crimson Seedless cultured on six different basal media i.e. Murashige and Skoog (MS), Eriksson (ER), Gamborg (B5), Nitsch and Nitsch (NN), Woody plant medium (WPM) and Chee and Pool (C₂d) showed different percentage of shoot initiation and morphogenetic responses. The maximum shoot initiation (90.0%) was observed in MS medium. Except ER, all other media induced rooting at the base of nodal segments in varying percentages though number and quality of roots and their establishment on transfer to pots varied greatly. WPM induced the maximum rooting in nodal segments (69.1%) with establishment rate of 100.0%. Induction of multiple shoots in nodal segments was achieved on inclusion of 6-benzyl adenine (BA) (8.87 uM) and indole-3-butyric acid (IBA) (1.48 uM) in the MS medium. In second sub-culture i.e., at 90 days, shoot bud proliferation could be increased many fold on transfer of these initial shoot clumps to glass bottles instead of culture tubes. The maximum average number of primary shoots (19.5 per explant) was achieved on MS with BA (8.87 uM) and IBA (1.48 uM). Elongation of shoots was achieved on MS with BA (2.22 uM) + a-naphthalene acetic acid (NAA) (0.54 uM). Induction of ex vitro rooting and establishment of rooted shoots after transfer to pots was achieved in different efficiencies when shoots were given pulse treatment of indole-3-acetic acid (IAA) or IBA or NAA at 57.08, 49.0 and 53.71 uM, respectively, for 5 or 10 min. Survival of in vitro and ex vitro-rooted shoots on potting was 90.0 and 100.0%, respectively.

Central Institute of Medicinal and Aromatic Plants, Lucknow-226015, India.

DOI: https://doi.org/10.37855/jah.2008.v10i01.10

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Abstract: Changes in growth attributes, photosynthesis (Pn), photosynthetic pigments with y-Glu.cys peptidase peptide and Zn accumulation in a Zn-efficient genotype of spearmint MSS-5 were investigated. Effect of phosphorus toxicity on MSS-5 were significantly different than the other genotypes; Arka, Neera and control (the local strain), in terems of phenotypic changes in height and a decrease in chlorophyll contents and CO₂ exchange rate. Heavy P manuring lead to the tolerance of Zn accumulation in MSS-5 with y-Glu.cys. peptidase peptide with high protein contents and Pn. Hence, the P toxicity induced a differential utilization of y-Glu.cys.peptidase peptide for higher accumulation of Zn in MSS-5 spearmint with higher photosynthetic rate for increasing the height and essential monoterpene oil(s). The study also indicated that accumulation of toxic heavy metal-Zn with y-Glu.cys.peptidase peptide made protein synthesis easier with antioxidants Zn cofactor enzymes.

University of Illinois Extension, Mt. Vernon, Illinois

DOI: https://doi.org/10.37855/jah.2008.v10i01.11

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Abstract: Growth of Callicarpa dichotoma (Lour.) 'Early Amethyst' and Ilex glabra (L.) 'Compacta' liners were evaluated in substrate containing 20, 40, 60, 80 and 100% composted biosolids as compared to a 3:2:1 (v:v:v) pine bark:peat:sand horticultural mix. Biosolid waste substrate amended with biosolids had higher pH, EC, nitrate, bulk density and container capacity compared to a standard horticultural nursery mix. Total porosity and air-filled capacity were greater for the control compared to substrate amended with biosolids. The effects of substrate amended with composted biosolids on growth varied for each species. Callicarpa dichotoma "Early Amethyst' liners grown in substrate amended with 20, 40 and 60% biosolid waste had greater shoot and root dry weight and a better visual evaluation compared to the control. Ilex glabra 'Compacta' liners grown in the control (standard nursery mix) had greater shoot and root dry weight and a better visual evaluation compared to any biosolid amended substrate. It was concluded that substrate amended with biosolid waste can be utilized for the container production of plants, however, its usage may be species specific.

Department of Fertilization Technology, National Research Centre, Dokki, Egypt.

DOI: https://doi.org/10.37855/jah.2008.v10i01.12

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Abstract: The study was conducted for two successive years at a private farm in El-Saf, Giza, Egypt on 19 years old trees of olive cultivars, Picual, Aggizi and Manzanillo, grown in calcareous soils. Leaf nutrients were measured bi-monthly during the 2001-2002 growing season. The study revealed that most of nutrients in the soil were at inadequate level. Nutrient concentrations in the leaves of the three cultivars were nearly the same. Results revealed that leaf N ranged between low to satisfactory. P contents were adequate in spring while inadequate in summer. K leaf contents were adequate. Peaks of Mg were found to be the highest during winter. Ca peaks were observed during March-June. Fe and Zn were inadequate while Mn was adequate. The concentrations of Fe, Mn and Zn peaked during June, which could be due the repeated foliar application of these nutrients during this period. The seasonal nutrient changes (N, P, K, Ca, Mg, Fe, Mn, Zn and Cu) of the olive leaves are supposed to be used as a guide for proper fertilization. Nutrients should be added as acidic fertilizer to the soil, which is useful in calcareous and high pH conditions.

North Mississippi Research and Extension Center, P.O. Box 1690, Verona, MS, 38879, USA.

DOI: https://doi.org/10.37855/jah.2008.v10i01.13

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Abstract: The objective of the study was to evaluate the effects of cultivar and planting date on zinnia (Zinnia elegans) cut flower production. Parameters evaluated were the number of days to harvest, duration of harvest period for each planting date, number of stems per plant, stem length and diameter. Plants from the May planting date produced stems over a longer period of time compared to plants from the June and July plantings with the exception of 'Scarlet Splendor' from the July planting. Within each of the three planting dates, there were no statistically significant differences in the number of stems produced per plant due to the cultivar effect for 10 of the 13 cultivars evaluated. A trend of increasing stem and bloom size from the May planting date to the July planting was observed. The median number of stems produced by the zinnia cultivars in this study from the May, June, and July planting dates were respectively 21.6, 10.8 and 14.5 stems per plant for plants spaced one foot apart in the row. The potential stem yield for a single 100 ft row of the zinnia cultivars included in this trial was 2160, 1080 and 1450 stems for the production life of May, June, and July plantings, or 4690 stems for the three plantings combined. The cut flower zinnias evaluated in this study were very productive during the summer growing season.

National Bureau of Soil Survey and Land Use Planning, Amravati Road, Nagpur-440 010, Maharashtra, India.

DOI: https://doi.org/10.37855/jah.2008.v10i01.14

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Abstract: Six grape growing typical pedons in Nasik district, Maharashtra were characterised and soil-site parameters were correlated with yield and yield attributes of the crop. These soils were very shallow (Darana), moderately deep (Mahiravani, Kothure), shallow (Shivdi), deep (Talegaon) and very deep (Andersool) and characterised by well drained (Darana, Mahiravani, Shivdi) and moderately well drained (Talegaon, Kothure, Andersool). The height, stem girth, spread volume, bunch per plant, berries per bunch were very much related with soil depth, drainage, pH, available water content and DTPA extractable micronutrient cations.

Department of Biochemistry, Department of Horticulture, G.B. Pant University of Agriculture & Technology, Pantnagar-263 145, Uttarakhand, India.

DOI: https://doi.org/10.37855/jah.2008.v10i01.15

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Abstract: Picrorhiza kurroa Royle ex Benth (Kutki) has traditionally been used to treat disorders of the liver and upper respiratory tract, fever, and to treat dyspepsia, chronic diarrhoea and scorpion sting in Ayurveda medicine owing to the presence of active principles in root and rhizomes. The plant is self-regenerating but unregulated over-harvesting has caused it to be threatened to near extinction. The current research describes a protocol of micro propagation of this important medicinal plant from establishment to hardening in field conditions. Multiple shoots were induced in apical and axillary meristems derived from mature explants on Murashige and Skoogs (1962) medium supplemented with 0.25 mg L^-1 6-benzylaminopurine (BA), 0.25 mg L^-1 kinetin (KN), 0.5 mg L^-1 ascorbic acid and 3% (w/v) sucrose. Optimal rooting (86.6%) and growth of microshoots were observed on a medium containing 0.25 mg L^-1 indole-3-butyric acid (IBA) with 2 % (w/v) sucrose. Micropropagated plantlets were acclimatized and successfully grown in soil.

Ingeis-Conicet Pabellon Ingeis. Ciudad Universitaria (1428), Buenos Aires, Argentina, Facultad de Agronomia, UBA, Av. San Martin 4453 (1417), Buenos Aires, Argentina.

DOI: https://doi.org/10.37855/jah.2008.v10i01.17

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Abstract: The effect of conventional fertilization was compared with a vermicompost that was mixed with substrate for sweet basil (Ocimum basilicum L.) in a greenhouse experiment. The study was conducted in a completely randomized block design with 4 replications. Eight treatments were compared: a control treatment of a substrate mixture (T0: with no vermicompost added), five treatments with increasing percentages of vermicompost added to the substrate mixture (H1 to H5), and two treatments using two application rates of a chemical fertilizer (F1 and F2). Both fertilizer and vermicompost presented very low levels of heavy metals, which assured agronomical suitability. Vermicompost from SS-MSW (Source-Separated Municipal Solid Waste) and slaughterhouse sludge, presented significant value as soil conditioner and biofertilizer and produced increased levels of C and N (P<0.05). The phosphorus addition by vermicompost was high, with a decrease of zinc absorption by plants and potential contamination risk. Mixtures including more than 50% of the vermicompost and the highest rate of fertilizer showed statistically significant differences for dry weight, leaf length, plant survival and P-Zn antagonism (P<0.05).

Horticultural Science, Faculty of Agriculture, Kagawa University, Miki, Kagawa 761-0795, Japan.

DOI: https://doi.org/10.37855/jah.2008.v10i01.02

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Abstract: Delayed flowering of chrysanthemum under high temperature conditions is a serious obstacle for all year round cut chrysanthemum flower production in southern temperate and subtropical zones. To clarify the causes of flowering delay in spray chrysanthemum, two different genotypes of spray chrysanthemum (Dendranthema grandiflorum (Ramat.) Kitam. syn. Chrysanthemum morifolium) were grown under high-temperature conditions: summer-to-autumn flowering type (SA type, high temperature tolerant) and autumn flowering type (A type, high temperature sensitive). Their flower-bud initiation and development were subsequently compared. Results clarify that two independent events caused by high temperatures occur in the shoot apex of spray chrysanthemum under short-day conditions. First, high temperatures slowed floral development in inflorescence, thereby increasing the number of florets in both SA and A chrysanthemum genotypes. Secondly, high temperatures slowed the developmental speed of inflorescence after the budding stage, and the time to reach the bud break stage was prolonged, thereby delaying flowering, especially in A chrysanthemum genotypes.

Rafnajan's Payam Nor University; Department of Horticultural Science, University of Tehran; Pistachio Research Institute, Rafsanjan-Iran.

DOI: https://doi.org/10.37855/jah.2008.v10i01.18

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Abstract: Effects of different chilling periods were evaluated on growth and development of floral buds of male seedling trees (Pistacia.vera L.) for chilling requirements of male genotypes helpful in predicting overlapping of flowering with female trees and escape from spring cold damage. The chilling requirement and responses of male genotypes to chilling treatment were determined by applying eight levels of chilling to shoots (i.e. 600-1300 h) at 3?1 ^oC. Based on the effect of chilling hours on bud break on four male pistachio genotypes were grouped to early (P₁ and P₆) and late flowering (P₇ and P₁₀) types. Percentage and rate of bud break, duration of flowering, growth and development of bud (length and width) were evaluated. The results indicated that genotypes had different chilling requirement. Among the male pistachio genotypes, the adequate chilling hours (bud break >80%) for P₁, P₆, P₇ and P₁₀ genotypes were 800, 700, 1100, and 1300 hours, respectively. P₁ and P₆ had low chilling requirement (700 hours) for 50% bud break compared to P₇ and P₁₀ (900 and 800 hours). Increased chilling led to decreased heat unit requirements for sprouting, resulting in greater overall growth and development. Chilling was a determining factor in floral bud break for all the genotypes, increasing chilling also produced greater bud break percentages. All genotypes required fewer heat units for bud break as chilling increased. Increasing the chilling hours also increased the length and width of flower buds and reduced duration of flowering.