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棉花学报  2012 

外源一氧化氮对棉花种子吸胀期间耐冷性和发芽能力的影响

DOI: 1002-7807(2012)03-0265-07, PP. 265-271

Keywords: 一氧化氮,低温胁迫,抗氧化酶,发芽,棉花

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Abstract:

选用对温度敏感性不同的棉花品种为试验材料,研究外源一氧化氮供体硝普钠(SNP)对棉花种子吸胀期间的耐冷性及发芽力的影响。结果表明,一氧化氮引发处理棉花种子,能提高低温胁迫期间胚内过氧化物酶(POD)、过氧化氢酶(CAT)、超氧化物歧化酶(SOD)和抗坏血酸过氧化酶(APX)活性,以及可溶性蛋白质和脯氨酸(Pro)含量,降低了相对电导率及丙二醛(MDA)含量,同时显著提高发芽率,并显著缩短发芽时间。低温吸胀48h后,与对照相比,SNP处理后种子的发芽率平均提高29.85%,发芽时间平均缩短3d。因此,一氧化氮处理能提高棉花种子吸胀期间的耐冷性,提高低温胁迫下种子发芽能力。

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