H2S May Function Downstream of H2O2 in Jasmonic Acid-induced Stomatal Closure in Vicia faba
Hou Zhihui, Jing Liu, Lixia Hou, Xidong Li, Xin Liu
Abstract
Hou Zhihui, Jing Liu, Lixia Hou, Xidong Li, Xin Liu
Abstract
摘要: 以蚕豆(Vicia faba)为材料, 利用激光共聚焦显微技术和分光光度技术, 结合药理学实验, 探讨硫化氢(hydrogen sulphide, H2S)和过氧化氢(hydrogen peroxide, H2O2)在茉莉酸(jasmonic acid, JA)调控气孔运动信号转导中的作用。结果表明, H2S合成抑制剂氨氧基乙酸(aminooxy acetic acid, AOA)、羟胺(hydroxylamine, NH2OH)、丙酮酸钾(potasium pyruvate, C3H3KO3) 和氨水(ammonia, NH3), H2O2 清除剂抗坏血酸(ascorbic acid, AsA), 合成抑制剂水杨羟肟酸 (salicylhydroxamic acid, SHAM)、二苯基碘(diphenylene iodonium, DPI)均可逆转JA诱导的气孔关闭效应。JA能够明显提高蚕豆叶片及保卫细胞中的H2O2水平、H2S含量和L-/D-半胱氨酸脱巯基酶活性; H2S合成抑制剂可抑制JA引起的叶片H2S含量的增加; 而H2O2清除剂则可减弱JA对H2S含量变化和L-/D-半胱氨酸脱巯基酶活性的诱导效应。以上结果表明H2S和H2O2均参与了JA诱导的蚕豆气孔关闭, 且H2S(主要由L-/D-半胱氨酸脱巯基酶合成)可能作为H2O2的下游组分参与调控这 一信号转导过程。
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摘要: 以蚕豆(Vicia faba)为材料, 利用激光共聚焦显微技术和分光光度技术, 结合药理学实验, 探讨硫化氢(hydrogen sulphide, H2S)和过氧化氢(hydrogen peroxide, H2O2)在茉莉酸(jasmonic acid, JA)调控气孔运动信号转导中的作用。结果表明, H2S合成抑制剂氨氧基乙酸(aminooxy acetic acid, AOA)、羟胺(hydroxylamine, NH2OH)、丙酮酸钾(potasium pyruvate, C3H3KO3) 和氨水(ammonia, NH3), H2O2 清除剂抗坏血酸(ascorbic acid, AsA), 合成抑制剂水杨羟肟酸 (salicylhydroxamic acid, SHAM)、二苯基碘(diphenylene iodonium, DPI)均可逆转JA诱导的气孔关闭效应。JA能够明显提高蚕豆叶片及保卫细胞中的H2O2水平、H2S含量和L-/D-半胱氨酸脱巯基酶活性; H2S合成抑制剂可抑制JA引起的叶片H2S含量的增加; 而H2O2清除剂则可减弱JA对H2S含量变化和L-/D-半胱氨酸脱巯基酶活性的诱导效应。以上结果表明H2S和H2O2均参与了JA诱导的蚕豆气孔关闭, 且H2S(主要由L-/D-半胱氨酸脱巯基酶合成)可能作为H2O2的下游组分参与调控这 一信号转导过程。
Key concepts: Jasmonic acid, Chemistry, Function (biology), Animal science, Cell biology, Biology, Biochemistry, Gene