硫化氢缓解铝胁迫对水稻幼苗叶片抗氧化系统的调控  

Alleviation of Exogenous Hydrogen Sulfide on Rice Seedlings to Aluminum Stress

作　　者：孟丹[1] 安敏敏 杨立明[1,2] 

机构地区：[1]淮阴师范学院生命科学学院,江苏淮安223300 [2]淮阴师范学院江苏省环洪泽湖生态农业生物技术重点实验室,江苏淮安223300

出　　处：《淮阴师范学院学报（自然科学版）》2015年第1期52-55,共4页Journal of Huaiyin Teachers College;Natural Science Edition

基　　金：江苏省高校大学生实践创新训练计划重点项目(201410323012Z)

摘　　要：硫化氢(H2S)是植物体内重要的信号分子,可显著缓解重金属对水稻的毒害.以硫氢化钠(Na HS)作为硫化氢的供体,分别采用0.4 mmol/L Na HS,75μmol/L Al Cl3,75μmol/L Al Cl3+0.4 mmol/L Na HS处理水稻幼苗,测定H2S对水稻幼苗内氧化还原系统的影响.结果表明,铝胁迫显著增加了水稻幼苗体内过氧化氢和超氧阴离子的含量,以及超氧化物歧化酶(SOD),过氧化氢酶(CAT)等活性氧清除酶系的活性,而施加H2S供体Na HS显著降低了过氧化氢和超氧阴离子的含量,以及SOD和CAT的活性.Hydrogen sulfide （H2S）, an important signal molecular in plants, can alleviate the toxicity of metal stress to crops. In this study, the effects of H2S donor NaHS alleviating AlCl3-induced stress were conducted in the leaves of rice seedlings. We examined the metabolic responses of rice seedlings to aluminum stress focusing on reactive oxygen species （ ROS） metabolism including superoxide dismutase and catalase activity. The observed enzyme activities were higher in aluminum-stressed seedlings than in control plants, NaHS decreased the activities of superoxide dismutase and catalase, and the contents of superoxide radical and hydrogen peroxide. Taken together these results suggest that H2 S could regulate antioxidant system in rice seedlings leading to the alleviation of iluminum stress.

关 键 词：硫化氢 水稻 铝胁迫 抗氧化系统 

分 类 号：Q946[生物学—植物学]