Multi-omics analysis reveals differential molecular responses to cadmium toxicity in rice root tip and mature zone
文献类型: 外文期刊
第一作者: Kuang, Liuhui
作者: Kuang, Liuhui;Yan, Tao;Gao, Fei;Wu, Dezhi;Kuang, Liuhui;Yan, Tao;Gao, Fei;Tang, Wenbang;Wu, Dezhi;Tang, Wenbang;Tang, Wenbang
作者机构:
关键词: Cadmium toxicity; Root tip; Basal root; Transcriptome; Proteome; Metabolome
期刊名称:JOURNAL OF HAZARDOUS MATERIALS ( 影响因子:13.6; 五年影响因子:12.7 )
ISSN: 0304-3894
年卷期: 2024 年 462 卷
页码:
收录情况: SCI
摘要: Cadmium (Cd) is a highly toxic heavy metal that can be readily absorbed by plants and enriched in human body. Rice (Oryza sativa L.) yield and grain quality are affected by excessive Cd in the soil. Therefore, understanding the mechanisms of Cd absorption, accumulation and detoxification in the root apex is crucial for developing low-Cd rice cultivars. After Cd treatment, Cd concentration in rice root tips (RT) was 1.4 times higher than that in basal roots (BR). To uncover the distinct molecular responses to Cd toxicity, we conducted transcriptomic, proteomic, and metabolomic analyses on the two root sections. The results revealed that the RT exhibited 1.2-2.0 fold higher transcript or protein abundance of several Cd-related transporters than the BR, including Nramp1, Nramp5, IRT1, and HMA3, thereby contributing to more Cd accumulation in the RT. Furthermore, multi-omics analysis unveiled that the RT had enhanced activity in 'phenylpropanoid metabolism', 'AsA-GSH cycle' and 'tryptophan metabolism', conferring the stronger antioxidant system. While the BR showed higher activation in 'cell wall remodeling' and 'terpenoid biosynthesis'. This comprehensive study provides insights into the regulatory network of genes, proteins and metabolites involved in the differential responses to Cd toxicity between rice root tips and mature zones.
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