期刊论文

中文

棉花学报

1002-7807

2010

22

3

242-247

10.3969/j.issn.1002-7807.2010.03.009

国家自然科学基金（30900909） 湖南省教育厅优秀青年科研项目（08B033） 湖南省科技计划项目（2009NK3101）

本校为第一机构

分别以耐高温、中度敏感与敏感型3个棉花品系为材料,分析了它们在不同发育时期叶片和花药中SOD、POD、CAT保护酶活性和MDA含量的差异及在盛花期高温胁迫下的变化. 3个品系间叶片保护酶活性在苗期和盛蕾期几乎相同,在盛花期和结铃盛期耐高温显著高于敏感类型,而耐高温棉花叶片MDA含量自盛蕾期起显著低于敏感类型. 花药保护酶活性随生育进程而逐渐增加,耐高温棉花花药SOD和POD活性在花粉粒成熟期才显著高于敏感类型,而CAT活性和MDA含量在整个发育时期均分别显著高于和低于敏感类型材料. 盛花期高温胁迫显著地抑制叶片和花药的保护酶活性,导致MDA含量极显著地增加,但耐高温棉花叶片和花药保护酶活性...

Activities of SOD,POD,CAT protective enzymes and MDA content in main-stem leaf and anther at different develop-mental stages and their responses to high temperature stress at peak flowering stage were analyzed comparatively using three cotton lines exhibiting tolerance,moderate sensitivity and sensitivity to high temperature in the present paper.The protective en-zyme activities in main-stem leaves were nearly same among the three cotton lines at seedling and peak squaring stages,but sig-nificantly higher in tolerant line than susceptible ones at peak flowering and boll-setting stages.The MDA ...