张良英;牛歆雨;刘林;

• 1:西藏农牧学院植物科学技术学院

摘要(Abstract)：

【目的】为探讨UV-B增强下植物生长调节剂对油桃光合作用的调控,【方法】以‘中油桃8号’为试材,研究了叶面喷施6-BA和GA3对UV-B增强下油桃光合特性和抗氧化酶活性的影响。【结果】结果表明,补充15μW.cm-2的UV-B辐射后,油桃的净光合速率下降,叶绿素a含量增加;补充30μW.cm-2的UV-B辐射,净光合速率和叶绿素a含量受到明显抑制,叶绿素b略有下降。喷施50 mg.L-16-BA和GA3可有效提高UV-B增强下叶片的Pn和叶绿素a、b含量。50 mg.L-16-BA处理14 d后,UV-B增强下叶片的SOD、POD活性明显上升,MDA含量显著下降,类黄酮含量与对照无显著差异;而GA3处理则提高了叶片的类黄酮含量,但MDA和抗氧化酶活性无显著变化。【结论】UV-B辐射增强下,6-BA对油桃光合特性的促进可能与SOD等抗氧化酶活性的提高有关。

关键词(KeyWords)： 油桃;UV-B;植物生长调节剂;光合作用;抗氧化酶

Abstract:

Keywords:

基金项目(Foundation): 211工程高层次人才科研启动费项目(SZRC-211-11);; 国家科技支撑计划课题(2007BAC06B05)

作者(Authors): 张良英;牛歆雨;刘林;

DOI: 10.13925/j.cnki.gsxb.2012.05.022

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