Appropriate Supply of Ammonium Nitrogen and Ammonium Nitrate Reduces Cadmium Content in Rice Seedlings by Inhibiting Cadmium Uptake and Transport

文献类型： 外文期刊

第一作者： Hu, Yunchao

作者： Hu, Yunchao;Yan, Tiancai;Gao, Zhenyu;Lu, Xueli;Yang, Long;Shen, Lan;Zhang, Qiang;Hu, Jiang;Ren, Deyong;Zhang, Guangheng;Zhu, Li;Zeng, Dali;Qian, Qian;Li, Qing;Wang, Tiankang;Li, Li;Zeng, Dali

作者机构：

关键词： Oryza sativa; cadmium; nitrogen; ammonium nitrate; ammonium chloride

期刊名称：RICE SCIENCE （ 影响因子：6.1； 五年影响因子：5.6 ）

ISSN： 1672-6308

年卷期： 2024 年 31 卷 5 期

页码：

收录情况： SCI

摘要： Reasonable nitrogen (N) application is a promising strategy for reducing crop cadmium (Cd) toxicity. However, the specific form of N and the required amount that affect Cd tolerance and accumulation in rice remain unclear. This study explored the influence of different N-fertilizer forms (NH4NO3, 4 NO 3 , NH4Cl, 4 Cl, and KNO3) 3 ) and dosages on Cd tolerance and uptake in Cd-stressed N-sensitive and N-insensitive indica rice accessions. The results indicated that the Cd tolerance of N-sensitive indica accessions is more robust than that of N-insensitive ones. Furthermore, the shoot Cd content and Cd translocation rate in both N-sensitive and N-insensitive indica accessions decreased with an appropriate supply of NH4NO3 4 NO 3 and NH4Cl, 4 Cl, whereas they were comparable or slightly increased with increased KNO3. 3 . Unfortunately, we did not find significant and regular differences in Cd accumulation or translocation between N-sensitive and N-insensitive rice accessions. Consistent with the reduction of shoot Cd content, the addition of NH4NO3 4 NO 3 and NH4Cl 4 Cl also inhibited the instantaneous root Cd2+ 2+ uptake. The expression changes of Cd transport-related genes under different N forms and dosages suggested that the decreased shoot Cd content, caused by the increased supply of NH4NO3 4 NO 3 and NH4Cl, 4 Cl, is likely achieved by reducing the transcription of OsNRAMP1 and OsIRT1. . In summary, our findings reveal that an appropriate supply of NH4NO3 4 NO 3 and NH4Cl 4 Cl could reduce Cd uptake and transport in rice seedlings, suggesting that rational N management could reduce the Cd risk in rice production.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序