PJB-2017-206
HORMONAL SEED PRIMING IMPROVES WHEAT (TRITICUM AESTIVUM L.) FIELD PERFORMANCE UNDER DROUGHT AND NON-STRESS CONDITIONS
ANEELA ULFAT, SYED ABDUL MAJID AND AMJAD HAMEED
Abstract
Global warming and unexpected climatic change especially increased in temperature and drought incidence were forced the agri- scientist to develop long term future strategies required for all drought and temperature sensitive crops including wheat. The objective of this study was to explore the process of better wheat growth and development under premises of drought. Five wheat cultivars were used to study the effect of drought and to cope drought with hormonal priming. Wheat seeds were primed in 10-4 M concentration of Salicylic acid (SA) and Gibberellic acid (GA), control was also used. Yield and yield components were decreased under drought. PAKISTAN-13 had the highest grain yield under normal and stress condition. The highest yield reductions were found in CHAKWAL-50 under normal condition. Under stress condition CHAKWAL-50 also had minimum yield. Among five genotypes FSD-08 maintained its yield under drought stress as compared to other genotypes. Hormonal priming improved yield under normal condition and overcome the effect of stress under drought. Priming increased the grain yield in CHAKWAL-50 and other genotypes. PAKISTAN-13 had the highest harvest index under normal condition and also under stress condition. PAKISTAN-13 and FSD-08 had the highest stress tolerance index while SA priming increased the stress tolerance index in CHAKWAL-50. Total sugar and protein contents were increased under drought. In conclusion, under normal and drought stress genotypic difference was observed for yield and yield contributing traits. PAKISTAN 13 and FSD-08 were wining genotypes. Seed priming was able to overcome stress and increased yield. Stress tolerance index was also improved by using hormonal priming. Genotype response was different under normal and drought stress.
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