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一氧化氮对高温胁迫下菊花生理特性的影响

DOI: 10.7685/j.issn.1000-2030.2011.01.008, PP. 41-45

Keywords: 一氧化氮,高温胁迫,菊花,氧化损伤,抗氧化酶

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Abstract:

以夏菊品种早黄为材料,研究了高温胁迫下外源一氧化氮(NO)对开花期菊花叶片和花瓣相关生理指标变化的影响。结果表明0.2mmol.L-1NO供体硝普钠(SNP)对高温胁迫下菊花叶片和花瓣的氧化损伤具有保护作用。与对照相比,外施SNP显著提高了叶片和花瓣中NO含量及超氧化物歧化酶、过氧化物酶、过氧化氢酶、抗坏血酸过氧化物酶的活性,降低了超氧阴离子活力及过氧化氢和丙二醛含量。表明NO作为一种重要的信号分子,可能通过诱导菊花抗氧化酶系统的活性来减轻细胞的膜脂过氧化,增强菊花对高温胁迫的抵抗能力。

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