文献类型： 外文期刊

作者： Zhou, Yongshun ¹ ; Meng, Fanze ¹ ; Zhang, Jinling ¹ ; Zhang, Haonan ¹ ; Han, Kai ¹ ; Liu, Changyong ² ; Gao, Jianfeng ¹ ; Chen, Fulong ¹ ;

作者机构： 1.Shihezi Univ, Coll Life Sci, Shihezi 832000, Xinjiang, Peoples R China

2.Xinjiang Acad Agr Reclamat Sci, Green Food Testing Ctr, Minist Agr, Shihezi 832003, Peoples R China

关键词： Arid areas; Eremostachys moluccelloides Bunge; Arsenic stress; Transcriptomics

期刊名称：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY （ 影响因子：6.8； 五年影响因子：6.9 ）

ISSN： 0147-6513

年卷期： 2023 年 266 卷

页码：

收录情况： SCI

摘要： The saline, alkaline environment of arid soils is conducive to the diffusion of the metalloid arsenic (As). Desert plants in this area are of great ecological importance and practical value. However, there are few studies on the mechanism of arsenic action in desert plants. Therefore, in this study, Eremostachys moluccelloides Bunge was treated with different concentrations of As2O5 [As(V)] to analyze the physiological, biochemical, and transcriptomic changes of its roots and leaves and to explore the molecular mechanism of its response to As(V) stress. The activities of catalase, superoxidase, peroxidase, and the contents of malondialdehyde and proline in roots and leaves first increased and then decreased under the As(V) stress of different concentrations. The content of As was higher in roots than in leaves, and the As content was positively correlated with As(V) stress concentration. In the differentially expressed gene analysis, the key enzymes of the oxidative stress response in roots and leaves were significantly enriched in the GO classification. In the KEGG pathway, genes related to the abscisic acid signal transduction pathway were co-enriched and up-regulated in roots and leaves. The related genes in the phenylpropanoid biosynthesis pathway were significantly enriched and down-regulated only in roots. In addition, the transcription factors NAC, HB-HD-ZIP, and NF-Y were up-regulated in roots and leaves. These results suggest that the higher the As(V) stress concentration, the more As is taken up by roots and leaves of E. molucelloides Bunge. In addition to causing greater oxidative damage, this may interfere with the production of secondary metabolites. Moreover, it may improve As(V) tolerance by regulating abscisic acid and transcription factors. The results will deepen our understanding of the molecular mechanism of As(V) response in E. moluccelloides Bunge, lay the foundation for developing and applying desert plants, and provide new ideas for the phytoremediation of As pollution in arid areas.