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棉花学报  2014 

镉胁迫对三个棉花品种（系）产量、纤维品质和生理特性的影响

DOI: 1002-7807(2014)06-0521-10, PP. 521-530

Keywords: 棉花,镉胁迫,产量,纤维品质,抗氧化酶系统,MDA

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Abstract:

以抗草甘膦棉花种质系ZD-90和转Bt基因抗虫棉品种sGK3为材料，以陆地棉标准系TM-1为对照，研究了镉（Cd）胁迫下棉花生育期内的植株生长、产量、农艺性状、纤维品质和抗氧化酶系统活性。结果表明，低浓度Cd对棉花植株的生长发育有一定的促进作用；高浓度Cd对植株的生产发育有显著的抑制作用，植株生长量、子棉产量和皮棉产量显著降低。Cd胁迫对棉花单株铃数、铃重和单铃种子数的影响较大，而对衣分无显著影响。不同浓度Cd处理间的棉花纤维品质性状无显著差异。棉花植株体内的抗氧化化物酶（POD、SOD和CAT）活性在棉花生长发育的初期或低浓度胁迫条件下迅速升高，但随着Cd浓度的增大和胁迫时间的延长，酶活性受到抑制。植株体内累积的MDA含量则随着Cd处理浓度的增加和胁迫时间的延长呈逐渐升高趋势。3个品种比较，TM-1对Cd较敏感，ZD-90次之，sGK3受Cd胁迫的为害相对较轻，是一个较耐Cd的棉花品种。

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