Analysis of Cadmium Accumulation Characteristics Affected by Rhizosphere Bacterial Community of Two High-Quality Rice Varieties
文献类型： 外文期刊
作者： Zhang, Shangdu 1 ; Luo, Zhengliang 2 ; Peng, Ju 1 ; Wu, Xiang 1 ; Meng, Xiufei 1 ; Qin, Yuanyi 1 ; Zhu, Feiying 2 ;
作者机构： 1.Guizhou Acad Agr Sci, Guiyang 550006, Peoples R China
2.Hunan Acad Agr Sci, Changsha 410125, Peoples R China
关键词： cadmium; microbiome; rice; rhizosphere bacterial
期刊名称：PLANTS-BASEL （ 影响因子：4.1； 五年影响因子：4.5 ）
ISSN： 2223-7747
年卷期： 2025 年 14 卷 12 期
页码：
收录情况： SCI
摘要： Cadmium-contaminated rice poses serious health risks through the bioaccumulation of Cd (cadmium) from soil to edible grains. Cd contamination disrupts soil microbial ecology and alters microbial diversity. However, the role of cultivar-specific rhizosphere microbial communities in modulating Cd uptake remains unclear. In this study, we aimed to elucidate the mechanism underlying variety-dependent rhizosphere microecological remodeling and Cd accumulation in two independently selected late rice varieties, Yuzhenxiang (YZX) and Xiangwanxian 12 (XWX12). Combining physiological and metagenomic analyses, we revealed variety-specific correlations between root Cd accumulation and dynamic changes in soil pH, soil available phosphorus, and rhizosphere bacteria. The key bacterial genera (Variibacter, Nitrospira) showed differential enrichment patterns under Cd stress. In contrast, Galella and Anaeromyxobacter likely reduce Cd bioavailability by modulating phosphorus availability. Overall, this study elucidates that rice cultivars indirectly shape Cd accumulation patterns via rhizosphere microbial remodeling, providing novel insights for microbial remediation strategies in Cd-contaminated farmland.
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