Journal Of Applied Horticulture ISSN: 0972-1045


Singh, V K; Saini, J P; Misra, A K

Central Institute for Subtropical Horticulture, Rehmankhera, PO. Kakori, Lucknow - 227 107, India.

Key words: chemical composition, crop growth stage, cultivars, enzyme activity, enzymes, glutamate dehydrogenase, glutamate synthase, glutamate ammonia ligase, mangoes, nitrate, nitrate reductase, nitrogen content, panicles, plant composition, plant disorders, prote

Journal of Applied Horticulture, 2001, volume 3, issue 2, pages 91-94.

Abstract: The activity of nitrogen-utilizing enzymes, i.e. nitrate reductase (NR), glutamine synthetase [glutamate-ammonia ligase] (GS), glutamate synthase (GOGAT), and glutamate dehydrogenase (GDH), during the development of healthy and malformed panicles of mango cultivars Amrapali and Dashehari was studied in Lucknow, Uttar Pradesh, India, during 1995-97. Healthy and malformed panicles were evaluated at stages I (fully developed apical bud), II (flower bud at inception), III (fully grown panicles prior to full bloom), and IV (fully developed panicle at the full bloom stage). NR activity was significantly reduced in normal panicles from stage I to IV in both cultivars. Non-significant changes were observed in the malformed panicles of Amrapali. In general, the activity of GS and GOGAT followed the same trend. Contrary to the activity of NR, GS, and GOGAT, a sharp increase in GDH activity was observed in malformed panicles at the early stage of panicle development. GDH activity, which was highest at stage II in both c

Journal of Applied Horticulture