硫化氢对盐胁迫下达乌里胡枝子生长和抗氧化系统的影响  

Effects of Hydrogen Sulfide on the Growth and Antioxidant System of Lespedeza davurica under Salt Stress

作　　者：张亚慧 马春 张晓燕[1,2] 张田 王开喜 赵祥 朱慧森[1,2] 王永新 ZHANG Ya-hui;MA Chun;ZHANG Xiao-yan;ZHANG Tian;WANG Kai-xi;ZHAO Xiang;ZHU Hui-sen;WANG Yong-xin(College of Grassland Science,Shanxi Agricultural University,Taigu,Shanxi Province 030801,China;Shanxi Key Laboratory of Grassland Ecological Protection and Native Grass Germplasm Innovation,Taigu,Shanxi Province 030801,China)

机构地区：[1]山西农业大学草业学院,山西太谷030801 [2]草地生态保护与乡土草种质创新山西省重点实验室,山西太谷030801

出　　处：《草地学报》2024年第3期772-780,共9页Acta Agrestia Sinica

基　　金：山西省重点研发计划项目(201903D211012);山西省牧草产业技术体系项目(2023CYJSTX11-11)资助。

摘　　要：为探讨外源硫化氢对盐胁迫下达乌里胡枝子(Lespedeza davurica)幼苗生长和抗氧化系统的影响,本试验以盐胁迫下的达乌里胡枝子为研究对象,通过施加不同浓度的外源硫化氢,并在盐胁迫第0,10,20,30 d分别测定幼苗的生长特性和抗氧化系统指标。结果表明:施加外源硫化氢缓减了盐胁迫对达乌里胡枝子幼苗生长的抑制作用,提高了盐胁迫下达乌里胡枝子幼苗抗氧化酶活性以及抗坏血酸和谷胱甘肽含量,增加了叶片相对含水量,降低了叶片相对电导率以及丙二醛的含量。综上所述,施加外源硫化氢在一定程度上提高了达乌里胡枝子幼苗叶片的抗氧化酶活性,延缓了膜脂过氧化的发生,因此增强了达乌里胡枝子幼苗对盐的耐受性。In order to investigate the effects of exogenous hydrogen sulfide on the growth and antioxidant system of Lespedeza davurica seedlings under salt stress,different concentrations of exogenous hydrogen sulfide were added to Lespedeza davurica seedlings,and the growth characteristics and antioxidant system indexes at the 0,10,20 and 30 d under salt stress were measured.The results showed that the addition of exogenous hydrogen sulfide weakened the inhibition of salt stress on the growth of Lespedeza davurica seedlings,improved the activity of antioxidant enzyme of Lespedeza davurica seedlings under salt stress,increased the content of ascorbic acid,glutathione of Lespedeza davurica seedlings and relative water content in leaves under salt stress,and decreased the relative electrolyte leakage and malondialdehyde content in leaves.To sum up,the addition of exogenous hydrogen sulfide to some extent increased the activity of antioxidant enzyme in the leaves of Lespedeza davurica seedlings,retarded the occurrence of lipid peroxidation,and then improved the survivability of Lespedeza davurica seedlings.

关 键 词：达乌里胡枝子 硫化氢 盐胁迫 抗氧化系统 

分 类 号：S541.5[农业科学—作物学]