ÃÞ »¨ ѧ ±¨ Cotton Science 2009£¬21(4)£º296-301
Effects of Drought on Cell Membrane Damage,Activities of Protective Enzymes and Yield of Different Boll-weight Genotypes in Cotton Abstract£ºThe effects of water stress on cell damage, activities of protective enzymes and yield of different boll-weight genotypes in cotton were studied. The result showed that: under water stress, the content of MDA in these genotypes increased significantly according to both each genotype and each position and the increasing extent varied greatly with genotypes, stages and positions. Among the three species, the middle-boll genotype increased the least under water stress, the activities of SOD and POD increased at different position and for different genotypes in the most time, the activities of SOD in upper branch and middle branch leaves were the lowest at the 30-days age, and the changes were the same according to different position and for different genotypes, the change of the activity of SOD in upper branch and bottom branch leaves with middle-boll genotype was more obvious than big-boll genotype and small-boll genotype. So far as the branch leaves of different locations at every period were concerned, the activity of POD in middle branch was the highest according to positions and stages, and the bottom branch was the second, and the upper branch was the lowest. The decreasing extent of boll weight and yield with middle-boll variety was the least which indicated that middle-boll genotype has higher drought tolerance ability than the other genotypes.
|