Activities of sucrose to starch metabolizing enzymes during grain filling in late sown wheat under water stress
Journal Title: Journal of Applied and Natural Science - Year 2017, Vol 9, Issue 1
Abstract
Tolerance to water deficit in relation to activities of sucrose-to- starch metabolizing enzymes and starch accumulation was studied in the grains of contrasting wheat (Triticum aestivum L.) genotypes (WH1021 and WH1080; tolerant) and (WH711 and HD2687; susceptible) under late planting conditions. The activities of starch metabolizing enzymes i.e. sucrose synthase (SuSase), ADP-glucose pyrophosphorylase (AGPase), soluble starch synthase (SSS) and starch branching enzymes (SBE) were substantially enhanced by water deficit in all genotypes at early to mid-grain filling stage showing peaks at 14 to 21 days after anthesis (DAA); while decreased significantly at mid-late grain filling stage with maximum decline at 35 DAA. Activities of all the enzymes under study showed maximum decline in activity (28.4–60%) in susceptible genotype WH711; whereas WH1021 proved to be most tolerant one with minimum decline in enzyme activity (14.9–32.8%). Starch content was also markedly reduced (21%) in WH711 due to drought while WH1021 reported 12% decline corresponding well with enzyme activity. A faster pre-mature cessation of starch deposition occurred in susceptible wheat genotypes compared to tolerant ones. A significant and positive correlation of the enzyme activities with starch accumulation (r = 0.491–0.555 at P0.05 for SuSase, AGPase, SSS and r = 0.638 at P0.01 for SBE) under well watered conditions indicated that enhancing the activities of the enzymes would lead to increase in starch accumulation and thus faster grain filling. Genotype WH1021 proved to be most efficient based on comparatively higher enzyme activity and least yield penalty under late planting conditions combined with water scarcity.
Authors and Affiliations
Reena Mahla, Shashi Madan, Virendra Kaur, Renu Munjal, Rishi Kumar Behl, Raghvendra Midathala
Keywords
Related Articles
- EP ID EP286471
- DOI 10.31018/jans.v9i1.1193
- Views 66
- Downloads 0
Alternaria blight of oilseed brassicas: A review on management strategies through conventional, non-conventional and biotechnological approaches
Oilseed Brassicas are contributing approximately 28 percent of the India’s total oilseed production. This crop is gaining wide acceptance among t he f a rme r s b e ca u s e of adaptability for both irrigated as well as...
Efficacy of Stamina 50 (Thiocyclam hydrogenoxalate) on Coelaenomenodera elaeidis (Coleoptera –Chrysomelidae – Hispinae) in Okomu oil palm lantation, Nigeria
Efficacy of Stamina 50, Thiocyclam hydrogenoxalate was evaluated for its bio-insecticidal control on Coelaenomenodera elaeidis larvae, pupae and adult forms, at Okomu oil palm plantation, Nigeria. The experimental plot...
Effect of cadmium chloride on general body colouration and chromatophores of stinging cat fish, Heteropneustes fossilis (Bloch)
Chromatophores, specialized pigment cells in poikilothermic animals, have shown great potential in their use as a cell-based biosensor in the detection of a broad range of environmental toxicants, as structure and number...
Effect of phytohormones on shoot apex and leaf explants of Withania somnifera (Ashwagandha)
An efficient protocol for callus induction of Withania somnifera through in vitro culture of shoot apex and leaf explant was standardized. Of the various combinations of phytohormones evaluated, MS media supplemented wit...
Yield enhancement of chilli through integrated crop management in Kalaburagi district of Karnataka, India
One of the major reasons of low productivity in chilli is the lack of technical knowledge of the farmers about judicious and timely implementation of the management strategies against the major biotic stresses (insect pe...