NaCl Facilitates Cell Wall Phosphorus Reutilization in Abscisic Acid Dependent Manner in Phosphorus Deficient Rice Root

文献类型： 外文期刊

第一作者： Yang, Xiaozheng

作者： Yang, Xiaozheng;Liu, Yusong;Huang, Jing;Tao, Ye;Shen, Renfang;Zhu, Xiaofang;Yang, Xiaozheng;Huang, Jing;Tao, Ye;Shen, Renfang;Zhu, Xiaofang;Liu, Yusong;Wang, Yifeng

作者机构：

关键词： abscisic acid; cell wall; NaCl; phosphorus transporter; phosphorus deficiency; remobilization

期刊名称：RICE SCIENCE （ 影响因子：4.8； 五年影响因子：5.5 ）

ISSN： 1672-6308

年卷期： 2023 年 30 卷 2 期

页码：

收录情况： SCI

摘要： Phosphorus (P) starvation in rice facilitates the reutilization of root cell wall P by enhancing the pectin content. NaCl modulates pectin content, however, it is still unknown whether NaCl is also involved in the process of pectin regulated cell wall P remobilization in rice under P starved conditions. In this study, we found that 10 mmol/L NaCl increased the shoot and root biomasses under P deficiency to a remarkable extent, in company with the elevated shoot and root soluble P contents in rice. Further analysis indicated that exogenous NaCl enhanced the root cell wall P mobilization by increasing the pectin methylesterase activity and uronic acid content in pectin suggesting the involvement of NaCl in the process of cell wall P reutilization in P starved rice roots. Additionally, exogenous NaCl up-regulated the expression of P transporter OsPT6, which was induced by P deficiency, suggesting that NaCl also facilitated the P translocation prominently from root to shoot in P starved rice. Moreover, exogenous abscisic acid (ABA) can reverse the NaCl-mediated mitigation under P deficiency, indicating the involvement of ABA in the NaCl regulated root cell wall P reutilization. Taken together, our results demonstrated that NaCl can activate the reutilization of root cell wall P in P starved rice, which is dependent on the ABA accumulation pathway.

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