Vol. 2 (2) : March-April 2011 issue
Green Farming Vol. 2 (2) : 142-144 (March-April, 2011) (New Series)
Effect of PEG induced moisture stress on germination and biochemical changes in soybean genotypes
SAVITA F. HULLUR1, R.V. KOTI2* and M.K. MEENA3
Department of Crop Physiology, University of Agricultural Sciences, Dharwad - 580 005 (Karnataka)
Designation : 1,3Ph.D. Scholar, 2Professor & Head *Correspondence
Subject : Plant Physiology, Crop Physiology and Bio-Chemistry
Paper No. :
Total Pages : 3
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Revised accepted :
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Citation :
SAVITA F. HULLUR, R.V. KOTI and M.K. MEENA. 2011. Effect of PEG induced moisture stress on germination and biochemical changes in soybean genotypes. Green Farming Vol. 2 (2) : 142-144 (March-April, 2011) (New Series)
ABSTRACT
Seeds of twenty soybean genotypes were subjected to varied levels of polyethylene glycol (PEG) induced stress (-0.3, -0.5, -0.75 to -0.1 MPa) to study its influence on germination, proline accumulation and activities of ?-amylase and dehydrogenase. The germination per cent decrease as the level of moisture stress increased. Most of the genotypes maintained relatively higher per cent (>70) at moderate stress level (-0.5 MPa) and maximum reduction in germination per cent (91.6) occurred at very high level of stress (-0.1 MPa). Similarly, the increased levels of stress significantly decreased the ?-amylase activity, whereas, the free proline content and dehydrogenase activity increased significantly. The genotypes RAUS-9702 followed by MACS-716, Monetta, MACS-567 and JS (SH) 93-37 had higher germination per cent at highest level of stress (-0.1 MPa) and also had relatively higher proline accumulation and dehydrogenase activity and hence these genotypes can be considered as stress tolerant.
Key words :
Amylase, genotypes and germination, PEG stress , proline, soybean.
