Salinity-induced accumulation of endogenous H₂S and NO is associated with modulation of the antioxidant and redox defense systems in Nicotiana tabacum L. cv. Havana

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• 作者：Cristiane Jovelina da Silva^a ; Elizabeth Pacheco Batista Fontes^b ; Luzia Valentina Modolo^a ; ^{lvmodolo@icb.ufmg.br}
• 关键词：ACN ; acetonitrile ; APX ; ascorbate peroxidase ; BHT ; butylated hydroxytoluene ; CAS ; cyanoalanine synthase ; CAT ; catalase ; cPTIO ; 2-(4-carboxyphenyl)-4 ; 4 ; 5 ; 5-tetramethylimidazoline-1-oxy-3-oxide ; CS ; cysteine synthase ; DTT ; dithiothreitol ; ε ; molar extinction coefficient ; EDTA ; ethylenediamine tetraacetic acid ; FOX ; ferrous ion oxidation in xylenol orange ; GSH ; reduced glutathione ; gs ; stomatal conductance ; GSSG ; oxidized glutathione ; H2S ; hydrogen sulfide ; HT ; hypotaurine ; L/D-DES ; L/D &ndash ; cys
• 刊名：Plant Science
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：256
• 期：Complete
• 页码：148-159
• 全文大小：2325 K
• 卷排序：256

文摘

The H2S and NO contents increased in response to the two concentrations of NaCl. l-DES, CAS and CS were the major sources of H2S in response to salinity. The increase of NO in stressed tobacco leaves was due to the induction of NR. Enzymatic and non-enzymatic antioxidant system was activated with high salinity. Depletion of H2S or NO compromised the response of antioxidant and redox systems.