干旱对不同铃重基因型棉花叶片细胞膜伤害、保护酶活性及产量的影响  

Effects of Drought on Cell Membrane Damage,Activities of Protective Enzymes and Yield of Different Boll-weight Genotypes in Cotton

作　　者：刘灵娣[1] 李存东[1] 孙红春[1] 刘连涛[1] 高雪飞[1] 冯丽肖[1] 

机构地区：[1]河北农业大学/河北省作物生长调控重点实验室,河北保定071001

出　　处：《棉花学报》2009年第4期296-301,共6页Cotton Science

基　　金：国家自然科学基金(30370833);教育部重点科技项目(02019);高等学校博士学科点专项科研基金(20050086003);河北省自然科学基金(303179)联合资助

摘　　要：研究水分胁迫对棉花叶片细胞膜伤害、保护酶活性及产量的影响。结果表明,在水分胁迫下,各棉花品种各部位果枝叶片中MDA含量明显增加,增加幅度因品种、时期和植株部位不同差异较大,其中,以中铃品种果枝叶片中MDA含量增加幅度最小。水分胁迫下各品种、各部位果枝叶片SOD、POD酶活性在棉铃发育的多数时期都明显升高,其中上、中部果枝叶SOD酶活性在棉铃30 d日龄时最低,并且这一规律不因品种类型和果枝区位而改变;中铃品种上部和下部果枝叶SOD酶活性在干旱胁迫下增加的幅度大于大铃和小铃品种;就不同区位果枝叶各时期总体情况而言,以中部POD酶活性最高,下部次之,上部最低。干旱胁迫下中铃品种的铃重和产量变化幅度最小,表现出较强的耐旱性。The 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.

关 键 词：棉花 干旱 细胞膜伤害 SOD POD 产量 

分 类 号：S562[农业科学—作物学]