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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

作者： Hu, Yunchao 1 ; Yan, Tiancai 1 ; Gao, Zhenyu 1 ; Wang, Tiankang 2 ; Lu, Xueli 1 ; Yang, Long 1 ; Shen, Lan 1 ; Zhang, Qiang 1 ; Hu, Jiang 1 ; Ren, Deyong 1 ; Zhang, Guangheng 1 ; Zhu, Li 1 ; Li, Li 2 ; Zeng, Dali 1 ; Qian, Qian 1 ; Li, Qing 1 ;

作者机构： 1.Chinese Acad Agr Sci, China Natl Rice Res Inst, State Key Lab Rice Biol & Breeding, Hangzhou 311401, Peoples R China

2.Hunan Acad Agr Sci, Hunan Hybrid Rice Res Ctr, State Key Lab Hybrid Rice, Changsha 410125, Peoples R China

3.Zhejiang A&F Univ, Coll Adv Agr Sci, Key Lab Qual Improvement Agr Prod Zhejiang Prov, Hangzhou 311300, Peoples R China

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.

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