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NO介导ABA诱导的玉米叶片叶绿体和质外体的抗氧化防护

DOI: 10.7685/j.issn.1000-2030.2006.04.008, PP. 33-37

Keywords: ABA,NO,抗氧化防护,叶绿体,质外体

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Abstract:

用硝普钠(SNP,NO供体)和ABA处理玉米幼苗,结果显示,ABA和SNP均增强了玉米叶片中抗氧化酶SOD、CAT、GR和APX的活性;激光共聚焦显微检测显示,ABA能够诱导叶片中NO的合成;NO清除剂PTIO和合成抑制剂L-NAME预处理阻断了ABA诱导的抗氧化酶活性的上升及NO的合成。对不同亚细胞区室的研究显示,ABA和NO对质外体和叶绿体中的抗氧化酶系统均表现出诱导效应,而PTIO和L-NAME阻断了这种诱导。上述结果表明,在玉米叶片中,NO介导了ABA的信号转导,诱导叶绿体和质外体中的抗氧化酶系统协同作用,共同提高了叶片的抗氧化防护能力。

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