Overexpression of the tonoplast aquaporin AtTIP5;1 conferred tolerance to boron toxicity in Arabidopsis

Journal of Genetics and Genomics = Yi Chuan Xue Bao
Yongqi PangXuechen Wang

Abstract

Boron (B) toxicity to plants is responsible for low crop productivity in many regions of the world. Here we report a novel and effective means to alleviate the B toxicity to plants under high B circumstance. Functional characterization of AtTIP5;1, an aquaporin gene, revealed that overexpression of AtTIP5;1 (OxAtTIP5;1) in Arabidopsis significantly increased its tolerance to high B toxicity. Compared to wild-type plants, OxAtTIP5;1 plants exhibited longer hypocotyls, accelerated development, increased silique production under high B treatments. GUS staining and quantitative RT-PCR (qRT-PCR) results demonstrated that the expression of AtTIP5;1 was induced by high B concentration treatment. Subcellular localization analysis revealed that the AtTIP5;1-GFP fusion protein was localized on the tonoplast membrane, which was consistent with the prediction based on bioinformatics. Taken together, our results suggest that AtTIP5;1 is involved in B transport pathway possibly via vacuolar compartmentation for B, and that overexpression of AtTIP5;1 in plants may provide an effective way to overcome the problem resulting from high B concentration toxicity.

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Citations

Mar 28, 2013·BMC Plant Biology·Paul BogackiKlaus H Oldach
Nov 22, 2013·PloS One·Stefan ReuscherKatsuhiro Shiratake
Nov 29, 2014·Critical Reviews in Biotechnology·Ashish Kumar SrivastavaLam-Son Phan Tran
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Mar 4, 2021·Journal of Phycology·Shaunna PhippsMary A Bisson
Jun 14, 2021·Ecotoxicology and Environmental Safety·Yingna FengFangsen Xu

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