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

Sakai, Yuki; Watanabe, Toshihiro; Wasaki, Jun; Senoura, Takeshi; Shinano, Takuro; Osaki, Mitsuru

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

Sakai, Yuki; Watanabe, Toshihiro; Wasaki, Jun et al.

Environmental Pollution, 2010, 158(12), 3663-3669

Permalink : https://hdl.handle.net/2115/44315

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アクセス権	open access
URI	https://hdl.handle.net/2115/44315
タイトル	Influence of arsenic stress on synthesis and localization of low-molecular-weight thiols in Pteris vittata
著者	Sakai, Yuki ; Watanabe, Toshihiro ; Wasaki, Jun ; Senoura, Takeshi ; Shinano, Takuro ; Osaki, Mitsuru
著者名 Sakai, Yuki
e-Rad_Researcher 60360939 著者名 Watanabe, Toshihiro
著者名 Wasaki, Jun
著者名 Senoura, Takeshi
著者名 Shinano, Takuro
著者名 Osaki, Mitsuru
言語	英語
キーワード	Arsenic tolerance
	Low-molecular-weight thiol
	Pteris vittata
	γ-Glutamylcysteine synthetase
	Oxidative stress
発行日	2010-12
出版者	Elsevier
収録物名	Environmental Pollution
巻(号)	158(12)
ページ	3663-3669
抄録	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.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
PISSN	0269-7491
関連情報	PMID 20822837
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.envpol.2010.07.043