Anthocyanin-mediated arsenic tolerance in plants

被引:69
作者
Ahammed, Golam Jalal [1 ]
Yang, Youxin [2 ]
机构
[1] Henan Univ Sci & Technol, Coll Hort & Plant Protect, Luoyang 471023, Henan, Peoples R China
[2] Jiangxi Agr Univ, Coll Agron, Collaborat Innovat Ctr Postharvest Key Technol &, Jiangxi Key Lab Postharvest Technol & Nondestruct, Nanchang 330045, Jiangxi, Peoples R China
基金
中国国家自然科学基金;
关键词
Arsenic; Anthocyanin; Food safety; Detoxification; Secondary metabolism; UV-VIS SPECTROSCOPY; LIGHT; BIOSYNTHESIS; ACCUMULATION; EXPRESSION; PHOSPHATE; TOXICITY; METAL; COLOR; PHOTOPROTECTION;
D O I
10.1016/j.envpol.2021.118475
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Plants detoxify toxic metal(loid)s by accumulating diverse metabolites. Beside scavenging excess reactive oxygen species (ROS) induced by metal(loid)s, some metabolites chelate metal(loid) ions. Classically, thiol-containing compounds, especially glutathione (GSH) and phytochelatins (PCs) are thought to be the major chelators that conjugate with metal(loid)s in the cytoplasm followed by transport and sequestration in the vacuole. In addition to this classical detoxification pathway, a role for secondary metabolites in metal(loid) detoxification has recently emerged. In particular, anthocyanins, a kind of flavonoids with ROS scavenging potential, contribute to enhanced arsenic tolerance in several plant species. Evidence is accumulating that, in analogy to GSH and PCs, anthocyanins may conjugate with arsenic followed by vacuolar sequestration in the detoxification event. Exogenous application or endogenous accumulation of anthocyanins enhances arsenic tolerance, leading to improved plant growth and productivity. The application of some plant hormones and signaling molecules stimulates endogenous anthocyanin synthesis which confers tolerance to arsenic stress. Anthocyanin biosynthesis is transcriptionally regulated by several transcription factors, including myeloblastosis (MYBs). The lightregulated transcription factor elongated hypocotyl 5 (HY5) also affects anthocyanin biosynthesis, but its role in arsenic tolerance remains elusive. Here, we review the mechanism of arsenic detoxification in plants and the potential role of anthocyanins in arsenic tolerance beyond the classical points of view. Our analysis proposes that anthocyanin manipulation in crop plants may ensure sustainable crop yield and food safety in the marginal lands prone to arsenic pollution.
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页数:9
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