Acid influences postharvest quality and oxidative activity of gerbera cut flowers
Yasmin de P. Lima Silva, Alexandre M. da Rosa Ferraz Jardim, Luzia F. da Silva, Damiana C. de Medeiros, Franciscleudo B. da Costa, Angela V. de Souza, Reginaldo C. Cerqueira7, Rainério M. da Silva and Marcos R. da S. Vieira
College of Agronomic Engineering, Federal University of Pará, Altamira-PA, Brazil. Department of Agricultural Engineering, Federal Rural University of Pernambuco, Recife-PE, Brazil. 3Department of Production Vegetable, Federal Rural University of Pernambuco, Serra Talhada-PE, Brazil. 4Department of Agropecuária, – Specialized Academic Unit in Agrarian Sciences, Federal University of Rio Grande do Norte, Macaíba-RN, Brazil. 5Center for Food Science and Technology, Federal University of Campina Grande, Pombal-PB, Brazil. 6São Paulo State University (UNESP), School of Science and Engeneering, Tupã-SP, Brazil. 7Department of Human Sciences, University of the State of Bahia, Barreiras-BA, Brazil.
DOI: https://doi.org/10.37855/jah.2020.v22i02.28
Key words: Gerbera jamesonii Bolus, ethylene, senescence, oxygen reactive species
Abstract: Gerbera is a very popular ornamental plant and used in ornamental gardens or as a cut flower. However, as a cut flower, postharvest quality is minimal, which requires solutions to ensure its longevity, especially with acidic solutions. The study was conducted understand if the action of maintenance solutions with acids influence the postharvest physiology of gerbera cv. ‘Piang’. The experimental design was factorial completely randomized consisting of two factors: four postharvest treatments and seven evaluation times. The flowers were kept in 200 mg L-1 of citric acid solution (ACS reagent, ? 99.5 % - Sigma-Aldrich), 200 mg L-1 of boric acid solution (ACS reagent, ? 99.5 %) and 200 mg L-1 of salicylic acid solution (ACS reagent, ? 99.0 %) and potable water as a control. During the postharvest period, fresh mass loss, water absorption, petal luminosity, total longevity, peroxidase (POD) enzyme activity, superoxide dismutase (SOD) activity, total protein and total carbohydrate content were studied. Treatments with boric and salicylic acids recorded higher percentage of fresh weight loss. Citric acid showed higher water absorption rate and better appearance in the luminosity of the petals. The total protein and carbohydrate content decreased during the evaluation period but in the citric acid treatment, the reduction was not so significant. On the other hand, citric acid induced higher peroxidase and superoxide dismutase activity in the second day of evaluation and lower activity until the tenth day.
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