Murtaza, Naveed .
Dissection of salinity tolerance in transgenic and non-transgenic cotton cultivars.
Abiotic soil stresses constitute a major limiting factor, which hamper plant productivity throughout the world. Salinity is the major stress factor, which delimit crop plants cultivation. The adverse effect of salinity on plants may lead to disturbances in plant metabolism, which consequently lead to a reduction of the plant growth and productivity. Five transgenic Bt cotton cultivars along with twenty non-transgenic cotton cultivars were treated at the seedling stage with different NaCl levels in the nutrient solution to determine the effects of NaCl salinity stress on seedling growth, total N, and total soluble and Bt protein concentrations. The results indicated that cotton seedling growth of both transgenic and non-transgenic genotypes were significantly affected by NaCl stress. The protein and Nitrogen percentage, root length, shoot length, fresh weight of root, fresh weight of shoot, fresh weight of leaves and dry weight of total biomass of all the genotypes of transgenic and Non-transgenic cotton were reduced. The protein and nitrogen percentage was less affected in transgenic genotypes of cotton in comparison with Non-transgenic genotypes of cotton. This might be due to the presence of Bt gene in the transgenic genotypes of cotton. While all other characters showed more or less similar type of pattern in both transgenic and Non-transgenic genotypes of cotton.
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1 - Bahauddin Zakaryia University, Plant Breeding and Genetics, University College of Agriculture, Bosan Road, Multan, Punjab, 000, Pakistan
Presentation Type: Oral Paper:Papers for Topics
Date: Tuesday, July 29th, 2008
Time: 9:15 AM