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

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...

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Bibliographic Details
Published in:International journal of molecular sciences 2022-03, Vol.23 (5), p.2854
Main Authors: Yang, Lifei, Yang, Huimin, Bian, Zhiwei, Lu, Haiyan, Zhang, Li, Chen, Jian
Format: Article
Language:English
Subjects:
Apoptosis
Brassica rapa
Cell death
Combined stress
Communication
Exposure
Hydrogen sulfide
mercury
Physiology
Phytotoxicity
Plant cells
Plant growth
Plant tolerance
Reactive oxygen species
Roots
selenium
Toxicity
Trace elements
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Summary: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.
ISSN:1422-0067
1661-6596
1422-0067
DOI:10.3390/ijms23052854