Novel Phosphate Transporter-B PvPTB1;1/1;2 Contribute to Efficient Phosphate Uptake and Arsenic Accumulation in As-Hyperaccumulator Pteris vittata
文献类型： 外文期刊
作者： Sun, Dan 1 ; Zhang, Xiang 1 ; Zeng, Zihan 1 ; Feng, Huayuan 1 ; Yin, Zhibin 3 ; Guo, Nan 4 ; Tang, Yetao 1 ; Qiu, Rongliang 1 ; Ma, Lena Q. 8 ; Cao, Yue 1 ;
作者机构： 1.Sun Yat sen Univ, Sch Environm Sci & Engn, Guangzhou 510275, Peoples R China
2.Sun Yat sen Univ, Guangdong Prov Engn Res Ctr Heavy Met Contaminated, Guangdong Prov Key Lab Environm Pollut Control & R, Guangzhou 510275, Peoples R China
3.Guangdong Acad Agr Sci, Agrobiol Gene Res Ctr, Guangdong Key Lab Crop Germplasm Resources Preserv, Guangzhou 510640, Guangdong, Peoples R China
4.Yangzhou Univ, Coll Hort & Landscape Architecture, Yangzhou 225009, Jiangsu, Peoples R China
5.Guangdong Lab Lingnan Modern Agr, Guangzhou 510642, Peoples R China
6.South China Agr Univ, Coll Nat Resources & Environm, Guangzhou 510642, Peoples R China
7.South China Agr Univ, Guangdong Prov Key Lab Agr & Rural Pollut Abatemen, Guangzhou 510642, Peoples R China
8.Zhejiang Univ, Inst Soil & Water Resources & Environm Sci, Coll Environm & Resource Sci, Hangzhou 310058, Zhejiang, Peoples R China
关键词： phytoremediation; low-affinity P transporters PvPTB1;1/1;2; dual P uptakesystem; high-affinity P transporter Pht1; phytatesecretion and hydrolysis; P/As transporters
期刊名称：ENVIRONMENTAL SCIENCE & TECHNOLOGY （ 影响因子：11.4； 五年影响因子：12.0 ）
ISSN： 0013-936X
年卷期： 2024 年 58 卷 17 期
页码：
收录情况： SCI
摘要： Arsenic (As) contamination in soil poses a potential threat to human health via crop uptake. As-hyperaccumulator Pteris vittata serves as a model plant to study As uptake and associated mechanisms. This study focuses on a novel P/AsV transport system mediated by low-affinity phosphate transporter-B 1 family (PTB1) in P. vittata. Here, we identified two plasma-membrane-localized PTB1 genes, PvPTB1;1/1;2, in vascular plants for the first time, which were 4.4-40-fold greater in expression in P. vittata than in other Pteris ferns. Functional complementation of a yeast P-uptake mutant and enhanced P accumulation in transgenic Arabidopsis thaliana confirmed their role in P uptake. Moreover, the expression of PvPTB1;1/1;2 facilitated the transport and accumulation of As in both yeast and A. thaliana shoots, demonstrating a comparable AsV uptake capacity. Microdissection-qPCR analysis and single-cell transcriptome analysis collectively suggest that PvPTB1;1/1;2 are specifically expressed in the epidermal cells of P. vittata roots. PTB1 may play a pivotal role in efficient P recycling during phytate secretion and hydrolysis in P. vittata roots. In summary, the dual P transport mechanisms consisting of high-affinity Pht1 and low-affinity PTB1 may have contributed to the efficient P/As uptake in P. vittata, thereby contributing to efficient phytoremediation for As-contaminated soils.
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