Google
 

Back to Contents

  Pak. J. Bot., 42(2): 977-986, 2010.

FREE FULL TEXT PDF

  Back to Contents
   

 

  Updated: 20-05-10

 

 

EFFECT OF POLYETHYLENE GLYCOL INDUCED DROUGHT STRESS ON PHYSIO-HORMONAL ATTRIBUTES OF SOYBEAN

 

MUHAMMAD HAMAYUN1, SUMERA AFZAL KHAN2, ZABTA KHAN SHINWARI3, ABDUL LATIF KHAN1,4, NADEEM AHMAD1 AND IN-JUNG LEE 1*

 

Abstract: Drought stress is a major abiotic constraint limiting crop production world wide. In current study, we investigated the adverse effects of drought stress on growth, yield and endogenous phytohormones of soybean. Polyethylene glycol (PEG) solutions of elevated strength (8% & 16%) were used for drought stress induction. Drought stress period span for two weeks each at pre and post flowering growth stage. It was observed that soybean growth and yield attributes significantly reduced under drought stress at both pre and post flowering period, while maximum reduction was caused by PEG (16%) applied at pre flowering time. The endogenous bioactive GA1 and GA4 content decreased under elevated drought stress. On the other hand, jasmonic acid (JA), salicylic acid (SA) and abscisic acid (ABA) content increased under drought stress. On the basis of current study, we concluded that application of earlier drought stress severely reduced growth and yield attributes of soybean when compared to its later application. Furthermore, increases in the endogenous contents of JA, SA and ABA in response to drought stress demonstrate the involvement of these hormones in drought stress resistance.   

 


1School of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Korea

2Center of Biotechnology and Microbiology, University of Peshawar, Pakistan

3Department of Plant Science, Quaid-i-Azam University, Islamabad, Pakistan

4Kohat University of Science & Technology, Kohat Pakistan


   
   

 

   
Back to Contents  

 

  Back to Contents