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OALib Journal期刊
ISSN: 2333-9721
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二氧化硫胁迫诱发拟南芥植株含硫抗氧化物水平提高
DOI: 10.3724/SP.J.1145.2010.00613, PP. 613-616
Keywords: 拟南芥,so2,硫同化作用,含硫抗氧化物,胁迫生理
Abstract:
以拟南芥（arabidopsisthaliana）为材料，研究二氧化硫（so2）熏气对植株硫同化作用的影响.结果显示，so2熏气后，拟南芥植株地上组织中硫同化关键酶半胱氨酸合成酶（oas-tl）活性提高，半胱氨酸（cys）和谷胱甘肽（gsh）含量显著增加，谷胱甘肽硫转移酶（gst）和谷胱甘肽过氧化物酶（gsh-px）的活性诱导性增高；gsh-px、gst和硫氧还蛋白等多种与逆境生理关系密切的基因表达上调.结果表明，so2胁迫能诱导拟南芥植株硫同化作用增强，使cys和gsh水平提高，促进相关防御酶活性及基因表达水平升高，以有效清除植物细胞中的活性氧和其它胞内有毒代谢物，提高植株对逆境的适应性.图3表1参20
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