Abstract
How plants control arsenic accumulation.
Highlights
In many parts of the world, groundwater contains so much arsenic that it builds up in irrigated crops
Salt identify an arsenicreducing enzyme in the plant Arabidopsis thaliana and show that this protein is critical to arsenic elimination (Figure 1)
To find the enzyme that transforms arsenate into arsenite in plants, the researchers used genome-wide association mapping, which links phenotypes—in this case, arsenic levels in leaves—to genes. They grew 349 types of A. thaliana collected from around the world at an environmentally relevant concentration of arsenic, and found that leaf arsenic levels varied more than 20-fold and that this variation was associated with a region of chromosome 2
Summary
In many parts of the world, groundwater contains so much arsenic that it builds up in irrigated crops. Salt identify an arsenicreducing enzyme in the plant Arabidopsis thaliana and show that this protein is critical to arsenic elimination (Figure 1). To find the enzyme that transforms arsenate into arsenite in plants, the researchers used genome-wide association mapping, which links phenotypes—in this case, arsenic levels in leaves—to genes.
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