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- Title
DROUGHT AND ABSCISIC ACID (ABA) INDUCED CHANGES IN PROTEIN AND PIGMENT CONTENTS OF FOUR WHEAT (TRITICUM AESTIVUM L.) ACCESSIONS.
- Authors
Iqbal, Sumera; Bano, Asghari; Ilyas, Noshin
- Abstract
The response of four wheat (Triticum aestivum L.) accessions (011251, 011417, 011320 and 011393) to drought and exogenously applied abscisic acid was determined in a pot study conducted at Quaid-i-Azam University, Islamabad, Pakistan during wheat-growing season 2005 and 2006. For this purpose water, total chlorophyll and carotenoid content of leaves at booting and grain-filling stages were measured. Sampling was done 3, 6 and 9 days after drought induction. Recovery was studied at 48 and 72 hours of re-watering. Marked decreases in leaf water potential as well as pigment content occurred under drought stress. Increase in protein content under drought remained a dominant response except for accession 011251. Accession 011320 was found to be the most sensitive among all accessions on the basis of greater decrease in water potential. The inhibitory effects of water stress on plant water status and biochemical contents were ameliorated by exogenous application of ABA. This ameliorating effect was found to be more significant at booting stage as compared to grain filling particularly in sensitive accession 011320. Upon rewatering, recovery from drought stress was found to be greater in case of abscisic acid treated plants.
- Subjects
PAKISTAN; WHEAT; CROPS; DROUGHT tolerance; CAROTENOIDS; CHLOROPHYLL; ABSCISIC acid
- Publication
Journal of Agricultural Research (03681157), 2010, Vol 48, Issue 1, p1
- ISSN
0368-1157
- Publication type
Article