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Jasmonic acid improves cadmium tolerance in rice ( Oryza sativa) by reducing the production of nitric oxide

文献类型： 外文期刊

作者： Yang, Ji Bo 1 ; Wang, Hao Yu 1 ; Huang, Jing 2 ; Shan, Chuan Jin 1 ; Yan, Jing 2 ; Zhong, Chong Wei 2 ; Hu, Die 2 ; Zhang, Qiang 4 ; Shen, Ren Fang 2 ; Zhu, Xiao Fang 2 ; Li Zeng, Da 1 ;

作者机构： 1.Zhejiang A&F Univ, Coll Adv Agr Sci, Hangzhou 311300, Peoples R China

2.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China

3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

4.Chinese Acad Agr Sci, Natl Nanfan Res Inst, Sanya 572000, Peoples R China

5.China Natl Rice Res Inst, State Key Lab Rice Biol & Breeding, Hangzhou 311400, Peoples R China

关键词： Jasmonic acid (JA); Rice; Cadmium (Cd) stress; Cell wall; Nitric oxide (NO)

期刊名称：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY （ 影响因子：6.1； 五年影响因子：6.4 ）

ISSN： 0147-6513

年卷期： 2025 年 290 卷

页码：

收录情况： SCI

摘要： The involvement of jasmonic acid (JA) in the rice's response to cadmium (Cd) stress is well recognized, though the underlying mechanisms remain unclear. In this study, exposure to Cd stress rapidly elevated endogenous JA concentrations in rice roots, meanwhile, a mutant coleoptile photomorphogenesis 2 (cpm2) which produces less JA, was more sensitive to Cd stress than its wild type (WT). JA mitigated Cd toxicity by decreasing Cd absorption in root cell wall and shoot, which was achieved by up-regulating the expression of the Cd-chelation and effluxrelated genes such as OsHMA3, OsABCG36 and OsCAL1; down-regulating the transcript level of the Cd uptake and translocation-related genes, including OsHMA2, OsCCX2, OsNRAMP1/5, and OsZIP5/7. Additionally, a reduction in hemicellulose content was observed in the root cell wall. Further analysis indicated that the mitigation effect of JA on Cd accumulation was dependent on the inhibition of nitric oxide (NO) synthesis, as the NO donor SNP could diminish this effect. In summary, JA effectively reduced Cd content in rice by modulating the cell wall's capacity for Cd uptake, potentially through reducing the production of NO.

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