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Regulation of soil micro-foodwebs to root secondary metabolites in cultivated and wild licorice plants

根际 生物 土壤学 生态系统 植物 土壤水分 大块土 土壤微生物学 微生物 生态学 土壤有机质 细菌 遗传学
作者
Yang Liu,Da Li,Hang Gao,Yuhua Li,Weimin Chen,Shuo Jiao,Gehong Wei
出处
期刊:Science of The Total Environment [Elsevier BV]
卷期号:828: 154302-154302 被引量:19
标识
DOI:10.1016/j.scitotenv.2022.154302
摘要

The diversity of soil eukaryotes and micro-foodwebs are only partially understood. Moreover, how they affect secondary metabolites in plant roots under distinct soil environment is not well elucidated. By combining multiple statistical analyses and network constructions, variations in soil eukaryotic diversity, community assembly processes and potential associations of holistic microbiotas were investigated in the bulk and rhizosphere soils of cultivated and wild licorice, and their regulatory patterns for root secondary metabolites were elucidated. The protistan communities displayed lower alpha diversity, more varied beta diversity patterns, and higher stochastic processes, as compared with fungal communities. Soil fungi individually played a more essential role than soil protists in the regulation of root secondary metabolites. Furthermore, rhizosphere soil was associated with more complicated networks than bulk soil; and wild licorice was associated with more complicated networks than cultivated licorice. Specific responsive modules resulting from networks were essential for the regulation of root secondary metabolites and were mostly affected by edaphic properties. Moreover, these modules directly or indirectly regulated the root secondary metabolites to varying degrees in the presence of soil protists. This indicated that the secondary metabolites were affected by associations between protistan, fungal and bacterial groups, and not merely by individual types of microorganisms in agricultural ecosystems. This study provides insight into the responses of root secondary metabolites to different groups of soil eukaryotic diversity and micro-foodwebs. The results have implications for comprehensively understanding the characteristics of the separate and combined roles of microbiotas for environmental management of licorice plantation ecosystem.
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