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Journal of Zhejiang University SCIENCE B 2019 Vol.20 No.6 P.513-527


Mechanisms and regulation of aluminum-induced secretion of organic acid anions from plant roots

Author(s):  Jian-Li Yang, Wei Fan, Shao-Jian Zheng

Affiliation(s):  Institute of Plant Biology, College of Life Sciences, Zhejiang University, Hangzhou 310058, China; more

Corresponding email(s):   sjzheng@zju.edu.cn

Key Words:  Acid soil, Aluminum (Al) toxicity, Expression regulation, Organic acid anion, Transporter

Jian-Li Yang, Wei Fan, Shao-Jian Zheng. Mechanisms and regulation of aluminum-induced secretion of organic acid anions from plant roots[J]. Journal of Zhejiang University Science B, 2019, 20(6): 513-527.

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author="Jian-Li Yang, Wei Fan, Shao-Jian Zheng",
journal="Journal of Zhejiang University Science B",
publisher="Zhejiang University Press & Springer",

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%T Mechanisms and regulation of aluminum-induced secretion of organic acid anions from plant roots
%A Jian-Li Yang
%A Wei Fan
%A Shao-Jian Zheng
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%DOI 10.1631/jzus.B1900188

T1 - Mechanisms and regulation of aluminum-induced secretion of organic acid anions from plant roots
A1 - Jian-Li Yang
A1 - Wei Fan
A1 - Shao-Jian Zheng
J0 - Journal of Zhejiang University Science B
VL - 20
IS - 6
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EP - 527
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Y1 - 2019
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.B1900188

Aluminum (Al) is the most abundant metal element in the earth’s crust. On acid soils, at pH 5.5 or lower, part of insoluble Al-containing minerals become solubilized into soil solution, with resultant highly toxic effects on plant growth and development. Nevertheless, some plants have developed Al-tolerance mechanisms that enable them to counteract this Al toxicity. One such well-documented mechanism is the Al-induced secretion of organic acid anions, including citrate, malate, and oxalate, from plant roots. Once secreted, these anions chelate external Al ions, thus protecting the secreting plant from Al toxicity. Genes encoding the citrate and malate transporters responsible for secretion have been identified and characterized, and accumulating evidence indicates that regulation of the expression of these transporter genes is critical for plant Al tolerance. In this review, we outline the recent history of research into plant Al-tolerance mechanisms, with special emphasis on the physiology of Al-induced secretion of organic acid anions from plant roots. In particular, we summarize the identification of genes encoding organic acid transporters and review current understanding of genes regulating organic acid secretion. We also discuss the possible signaling pathways regulating the expression of organic acid transporter genes.



Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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