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The Defensive Role of Endogenous H2S in Brassica rapa against Mercury-Selenium Combined Stress

文献类型： 外文期刊

作者： Yang, Lifei 1 ; Yang, Huimin 1 ; Bian, Zhiwei 1 ; Lu, Haiyan 3 ; Zhang, Li 4 ; Chen, Jian 3 ;

作者机构： 1.Nanjing Agr Univ, Dept Hort, Coll Hort, Nanjing 210095, Peoples R China

2.Nanjing Agr Univ, Hexian New Countryside Dev Res Inst, Hexian 238200, Peoples R China

3.Jiangsu Acad Agr Sci, Lab Food Qual & Safety State Key Lab Cultivat Bas, Minist Sci & Technol, Inst Food Safety & Nutr, Nanjing 210014, Peoples R China

4.Shandong Agr Univ, Dept Tobacco, Coll Plant Protect, Tai An 271018, Shandong, Peoples R China

关键词： Brassica rapa; hydrogen sulfide; mercury; reactive oxygen species; selenium

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：6.208； 五年影响因子：6.628 ）

ISSN：

年卷期： 2022 年 23 卷 5 期

页码：

收录情况： SCI

摘要： Plants are always exposed to the environment, polluted by multiple trace elements. Hydrogen sulfide (H2S), an endogenous gaseous transmitter in plant cells, can help plant combat single elements with excess concentration. Until now, little has been known about the regulatory role of H2S in response to combined stress of multiple elements. Here we found that combined exposure of mercury (Hg) and selenium (Se) triggered endogenous H2S signal in the roots of Brasscia rapa. However, neither Hg nor Se alone worked on it. In roots upon Hg + Se exposure, the defensive role of endogenous H2S was associated to the decrease in reactive oxygen species (ROS) level, followed by alleviating cell death and recovering root growth. Such findings extend our knowledge of plant H2S in response to multiple stress conditions.

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