Nanoselenium integrates soil-pepper plant homeostasis by recruiting rhizosphere-beneficial microbiomes and allocating signaling molecule levels under Cd stress

被引:54
作者
Li, Dong [1 ]
Zhou, Chunran [1 ]
Wu, Yangliu [1 ]
An, Quanshun [1 ]
Zhang, Jingbang [1 ]
Fang, Yong [2 ]
Li, Jia-Qi [1 ]
Pan, Canping [1 ]
机构
[1] China Agr Univ, Coll Sci, Innovat Ctr Pesticide Res, Dept Appl Chem, Beijing 100193, Peoples R China
[2] Hunan Agr Biotechnol Res Inst, Changsha, Hunan, Peoples R China
关键词
Nanoselenium; Cd; Microorganisms; Signaling molecule; Pepper plants; SELENIUM; MICROBES; CADMIUM;
D O I
10.1016/j.jhazmat.2022.128763
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Most studies have focused on regulation in a metabolic pathway in response to exogenous selenium under cadmium stress, rather than the change of key factors in soil and pepper plants. In this study, the correlations in environmental variables, microorganisms, metabolic pathways, Se and Cd morphology under nano-Se intervention were examined using metabolomics and microbial diversity in rhizosphere soil and pepper plants. The principal forms of Se in the soils were Se (VI) and SeCys, while SeMet and MeSeCys were the main components in the root, stem, leaves, and fruits in the treatment of nano-Se (5 and 20 mg/L) relative to the control. Soil enzymes,metabolites (fluorescein diacetate, urease, brassinolide, and p-hydroxybenzonic acid), and plant metabolites (rutin, luteolin, brassinolide, and abscisic acid) were remarkably enhanced by nano-Se fortification. The bio-enhancement of nano-Se can boost the beneficial microorganisms of Gammaproteobacteria, Alphaproteobacteria, Bacteroidia, Gemmatimonadetes, Deltaproteobacteria, and Anaerolineae in rhizosphere soil. Changes in microbial community were found to be strongly linked to the environment index, enzymes, soil metabolites, Se forms, which reduced Cd bioavailability and Cd accumulation in pepper plants. In conclusion, the nano-Se application integrates soil-plant balance by improving soil qualities and assigning signaling molecule levels in rhizosphere soil and pepper plants.
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页数:13
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