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Get Free AccessPhytochelatins (PCs) play a crucial role in detoxifying cellular arsenic (As) through complexation of arsenite. Here, we investigated whether PCs influence As accumulation in rice grain by using six rice cultivars varying in grain As accumulation. The cultivars with low grain As had significantly higher PCs concentration in the shoots than the cultivars with high grain As, but lower glutathione concentration. Shoot PCs concentration correlated negatively with grain As accumulation. Foliar sprays with 0.5mM l-buthionine-sulphoxime (BSO) on rice leaves at grain filling stage decreased GSH and PC accumulation in rice shoots by 40–63% and 20–55%, respectively, but did not significantly affect plant growth. Foliar sprays with BSO decreased shoot As concentration, while increased As concentrations in husk and brown rice significantly. These results suggest that PC complexation of arsenite in rice leaves reduces As translocation from leaves to grains, and implicate that manipulation of PC synthesis might mitigate As accumulation in rice grain.
Guilan Duan, Ying Hu, Wenju Liu, Ralf Kneer, Fang-jie Zhao, Yong‐Guan Zhu (2011). Evidence for a role of phytochelatins in regulating arsenic accumulation in rice grain. Environmental and Experimental Botany, DOI: 10.1016/j.envexpbot.2011.02.016.
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Type
Article
Year
2011
Authors
6
Datasets
0
Total Files
0
Language
English
Journal
Environmental and Experimental Botany
DOI
10.1016/j.envexpbot.2011.02.016
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