A defensin-like protein drives cadmium efflux and allocation in rice

文献类型： 外文期刊

第一作者： Luo, Jin-Song

作者： Luo, Jin-Song;Huang, Jing;Peng, Jia-Shi;Zhang, Guo-Bin;Ma, Hai-Ling;Guan, Yuan;Yi, Hong-Ying;Fu, Yan-Lei;Han, Bin;Lin, Hong-Xuan;Gong, Ji-Ming;Luo, Jin-Song;Huang, Jing;Peng, Jia-Shi;Zhang, Guo-Bin;Ma, Hai-Ling;Guan, Yuan;Yi, Hong-Ying;Fu, Yan-Lei;Han, Bin;Lin, Hong-Xuan;Gong, Ji-Ming;Luo, Jin-Song;Ma, Hai-Ling;Gong, Ji-Ming;Luo, Jin-Song;Huang, Jing;Qian, Qian

作者机构：

期刊名称：NATURE COMMUNICATIONS （ 影响因子：14.919； 五年影响因子：15.805 ）

ISSN： 2041-1723

年卷期： 2018 年 9 卷

页码：

收录情况： SCI

摘要： Pollution by heavy metals limits the area of land available for cultivation of food crops. A potential solution to this problem might lie in the molecular breeding of food crops for phytoremediation that accumulate toxic metals in straw while producing safe and nutritious grains. Here, we identify a rice quantitative trait locus we name cadmium (Cd) accumulation in leaf 1 (CAL1), which encodes a defensin-like protein. CAL1 is expressed preferentially in root exodermis and xylem parenchyma cells. We provide evidence that CAL1 acts by chelating Cd in the cytosol and facilitating Cd secretion to extracellular spaces, hence lowering cytosolic Cd concentration while driving long-distance Cd transport via xylem vessels. CAL1 does not appear to affect Cd accumulation in rice grains or the accumulation of other essential metals, thus providing an efficient molecular tool to breed dual-function rice varieties that produce safe grains while remediating paddy soils.

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