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Pak. J. Bot., 44(3): 861-865, 2012. |
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Updated: 05-05-12 | ||||
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RESPONSE OF GROUNDNUT (ARACHIS HYPOGAEA L.) GENOTYPES TO PLANT
GROWTH REGULATORS AND DROUGHT STRESS AYUB KHAN1*, JEHAN BAKHT2, ASGHARI BANO3 AND NASRULLAH JAN MALIK4
Abstract: The present study was carried out to investigate the physiological (relative water content) pod dry weight, pods plant-1, pod yield (kg plot-1), shelling (%), plant height and biochemical (endogenous ABA level) traits of peanut cultivar Swat Phalli-96 under drought stress. The result showed that drought stress significantly (p<0.05) reduced relative water content (RWC), pod dry weight, pods plant-1, pod yield (kg plot-1), shelling (%) and plant height. GA and IAA applied as seed treatment or foliar spray had no significant (p >0.05) effect on various parameters under drought stress conditions. However, foliar application of ABA (10-4 M) partially ameliorated the adverse effects of drought stress on growth and yield components. Foliar application of ABA to plants when subsequently exposed to drought stress resulted in elevated levels of endogenous ABA. The endogenous ABA levels in shoot increased earlier in response to applied ABA than that of root.
1Agricultural Research Institute (N) Mingora, Swat KPK Pakistan 2Institute of Biotechnology and Genetic Engineering, KPK Agricultural University Peshawar, Pakistan 3Department of Plant Sciences, Quaid-e-Azam University, Islamabad, Pakistan 4Agriculture Research System, KPK Agricultural University Peshawar, Pakistan *Corresponding author e-mail: peerayub@gmail.com |
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