作物学报2011，Vol.37Issue(1)：177-181,5.DOI:10.3724/SP.J.1006.2011.00177
外源一氧化氮供体硝普钠对水稻叶片中由硒引起的脂质过氧化的调节作用
Effects of Exogenous Nitric Oxide Donor SNP on Lipid Peroxidation Caused by Selenium in Rice Seedlings
摘要
Abstract
Nitric oxide (NO) is a bioactive molecule that has been suggested to act as a signaling molecular in plants.It induces germination, affects plant growth and development, and promotes plant cell death.NO is also involved in plant response to heat, salinity, ultraviolet-B, and heavy metal stresses.It is known that some effects of NO may relate to the regulation of reactive oxygen species (ROS) metabolism by means of affecting activities of catalase (CAT) with hemachrome iron, and/or guaiacol peroxidase (GPX) with none-hemachrome iron.However, whether NO regulates lipid peroxidation in rice seedlings induced by selenium is not yet understood.In this article, we reported some regulative effects of exogenous nitric oxide donor SNP on oxidative stresses induced by selenium in rice seedlings.The contents of chlorophyll, H2O2, TBARS and the activities of GPX, superoxide dismutase (SOD), CAT and ascorbate peroxidase (APX) in rice seedlings treated with a varying concentrations of selenium and 1 μmol L-1 SNP were investigated.The results showed that the content of chlorophyll increased by treatment with SNP in 0.2 μmol L-1 Na2SeO3 group.SNP alleviated significantly the lipid peroxidation in rice seedlings via promoting GPX, APX and CAT activities in rice leaf.In 20 μmol L-1 Na2SeO3 treated rice seedlings, SNP alleviated significantly TBARS content and the increase of H2O2 content that resulted from high selenium stress via promoting GPX, especially APX and CAT activities.Taken together, our results suggested that NO regulates lipid peroxidation caused by selenium in rice seedlings.关键词
水稻/硒/硝普钠(SNP)/脂质过氧化引用本文复制引用
肖强,杨曙,郑海雷..外源一氧化氮供体硝普钠对水稻叶片中由硒引起的脂质过氧化的调节作用[J].作物学报,2011,37(1):177-181,5.基金项目
本研究由国家自然科学基金项目(30670317),湖北省教育厅中青年人才项目(Q20092901),国家民委科研项目(09HB02),湖北民族学院博士启动基金项目和湖北民族学院校内青年科研项目(MYQ2006032)资助. （30670317）
