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Influence of arsenic stress on synthesis and localization of low-molecular-weight thiols in Pteris vittata

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Title: Influence of arsenic stress on synthesis and localization of low-molecular-weight thiols in Pteris vittata
Authors: Sakai, Yuki Browse this author
Watanabe, Toshihiro Browse this author →KAKEN DB
Wasaki, Jun Browse this author
Senoura, Takeshi Browse this author
Shinano, Takuro Browse this author
Osaki, Mitsuru Browse this author
Keywords: Arsenic tolerance
Low-molecular-weight thiol
Pteris vittata
γ-Glutamylcysteine synthetase
Oxidative stress
Issue Date: Dec-2010
Publisher: Elsevier
Journal Title: Environmental Pollution
Volume: 158
Issue: 12
Start Page: 3663
End Page: 3669
Publisher DOI: 10.1016/j.envpol.2010.07.043
PMID: 20822837
Abstract: The roles of low-molecular-weight thiols (LMWTs), such as glutathione and phytochelatins, in arsenic (As) tolerance and hyperaccumulation in Pteris vittata an As-hyperaccumulator fern remain to be better understood. This study aimed to thoroughly characterize LMWT synthesis in P. vittata to understand the roles played by LMWTs in As tolerance and hyperaccumulation. LMWT synthesis in P. vittata was induced directly by As, and not by As-mediated oxidative stress. Expression of PvECS2. one of the putative genes of γ-glutamylcysteine synthetase (γECS), increases in P. vittata shoots at 48 h after the onset of As exposure, almost corresponding to the increase in the concentrations of γ-glutamylcysteine and glutathione. Furthermore, localization of As showed similar trends to those of LMWTs in fronds at both whole-frond and cellular levels. This study thus indicates the specific contribution of LMWTs to As tolerance in P. vittata. γECS may be responsible for the As-induced enhancement of LMWT synthesis.
Type: article (author version)
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 渡部 敏裕

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