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CO2激光预处理对干旱胁迫引起小麦幼苗脂质过氧化伤害的防护作用

Keywords: CO2,激光,小麦,干旱胁迫,脂质过氧化

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Abstract:

用CO2激光(20.1mW·mm-2)对小麦种子分别辐照0、1、3、5min,待其长至12d时,用10%(w/v)PEG6000胁迫其幼苗,研究激光预处理对小麦幼苗干旱胁迫损伤的防护作用。结果表明,激光预处理(1、3min)可使干旱胁迫的小麦幼苗MDA含量和O2-产生速率显著降低(P<0.05),而AsA和GSH含量和根长却显著增加(P<0.05);另外激光预处理(1、3min)可显著(P<0.05)提高小麦幼苗SOD酶活和根系活力,而对POD和CAT活性没有显著作用。其综合效果表现为激光预处理3min可抑制由干旱胁迫引起的小麦脂质过氧化作用,从而增强小麦的抗旱性。

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