数字农科院2.0

Arsenite transporter OsNIP3;5 modulates phosphate starvation responses via regulating arsenite translocation in rice

文献类型： 外文期刊

作者： Xu Yang;Jiawei Zhu;Guangda Ding;Hongmei Cai;Lei Shi;Guohong Qiu;Xu Wang;Sheliang Wang;Chuang Wang

作者机构：

关键词： Arsenate;Arsenite transporter;Nodulin-26-like intrinsic aquaporin;Phosphate deficiency;Phosphate uptake;Rice

期刊名称： Plant Physiology and Biochemistry

ISSN： 0981-9428

年卷期： 2025 年 225 卷

页码：

收录情况： SCIE（2025版）

摘要： The plants inevitably absorb toxic arsenate [As(V)] through phosphate (Pi) transporters (PTs) in As-contaminated soils due to the structural similarity between phosphate and arsenate As(V). Plants suppress PT's expression to reduce As(V) uptake when As accumulates in the cytosol. However, how plants maintain efficient Pi uptake under As(V) stress conditions remains unknown. In this study, a nodulin 26-like intrinsic protein, OsNIP3;5, which coordinated Pi uptake and As stress adaptation by restricting the root to shoot As translocation in rice, was identified. The expression of OsNIP3;5 was specifically induced by Pi starvation and regulated by PHOSPHATE RESPONSE 2, a core Pi signaling regulator. OsNIP3;5 exhibited high arsenite [As(III)] permeability in yeast. Loss of OsNIP3;5 function resulted in As accumulation in xylem sap and shoots under low Pi plus As(V) conditions. Additionally, the suppressed expression of Pi-starvation responsive genes by prolonged As(V) treatment was more pronounced in nip3;5 mutants than that in WT, which consequently impaired Pi uptake of rice. In conclusion, we identified a Pi starvation-induced As(III) transporter that regulates Pi uptake ability by reducing arsenic accumulation in rice.

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