Arsenic Uptake by Plants Contributes to Human Exposures

Li N, Wang J, Song WY. Arsenic uptake and translocation in plantsPlant and Cell Physiology. 2015 Oct 10. pii: pcv143.

Arsenic (As) is a highly toxic metalloid that is classified as a non-threshold class-1 carcinogen. Millions of people worldwide suffer from As toxicity due to the intake of As-contaminated drinking water and food. Reducing the As concentration in drinking water and food is thus of critical importance. Phytoremediation of soil contaminated with As and the reduction of As contamination in foods depend on a detailed understanding of As uptake and transport in plants. As transporters play essential roles in As uptake, translocation, and accumulation in plant cells. In this review, we summarize the current understanding of As transport in plants, with an emphasis on As uptake, mechanisms of As resistance, and the long-distance translocation of As, especially the accumulation of As in grains through phloem-mediated transport.

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