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《Journal of Beijing University of Agriculture》 2018-03
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Effect of nitric oxide on physiological properties of Hylotelephium erythrostictum(Miq.) H.Ohba leaves under salt stress

CHEN Zhixin;CHEN Weinan;HU Zenghui;LENG Pingsheng;Beijing Collaborative Innovation Center for Eco-Environmental Improvement with Forestry and Fruit Trees,Beijing Laboratory of Urban and Rural Ecological Environment,College of Landscape Architecture,Beijing University of Agriculture;  
This study aimed to explore the role of nitric oxide(NO)in the salt tolerance of Hylotelephium erythrostictum(Miq.)H.Ohba.The hydroponic cutting seedlings were treated with different concentrations of NaCl,NaCl+sodium nitroprusside(SNP,NO donor),NaCl+sodium tungstate(T,nitrate reductase inhibitor)and NaCl+N′-nitro-L-arginine-methylesterhydrochloride(L-NAME,nitric oxide synthase inhibitor),the physiological indexes of leaves were measured.The results showed NaCl treatment led to significant increases in the relative electric conductivity(REC),malondialdehyde(MDA)content and soluble sugar content.SNP significantly reduced the REC and MDA content and increased the soluble sugar content under salt stress.Moreover,SNP treatment resulted in the increases of photochemical efficiency of photosystemⅡ(Fv/Fm),photochemical yield(Y(Ⅱ))and photochemical quenching coefficient(qP),and the decreases of minimal fluorescence(Fo)and nonphotochemical quenching coefficient(NPQ).The application of NO inhibitor led to the opposite results,and exacerbated the injury of salt stress on H.erythrostictum.These results indicated that NO could maintain the activity of PSⅡ reaction center,and reduce the damage of membrane system by salt stress to enhance the salt tolerance of H.erythrostictum.
【Fund】: 国家自然科学基金项目(31201645);; 北京市属高等学校创新团队建设与教师职业发展计划项目(IDHT20150503)
【CateGory Index】: Q945.78;S682.33
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