Physicochemical and Biotic Changes and the Phylogenetic Evenness of Microbial Community in Soil Subjected to Phytoreclamation

Yong Zhi Yang, Min Xin Luo, Hai Xia Yan, Run Hong Gao*, Jui Tse Chang, Chien Ti Chao, Pei Chun Liao

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

摘要

Phytoreclamation is the intervention of plants to improve degraded soil quality, changing soil biotic and abiotic properties. Many studies have focused on microbial composition and bioactivity, but few explored the changes in phylogenetic assemblages of soil microbiota after phytoreclamation. This study compared microbiomes of bare land to those of planted soils and investigated how the rhizosphere environment affects microbial assemblages from monocot Poa pratensis and eudicot Dianthus plumarius plantings using 16S rRNA metabarcoding. The results showed that the biotic susceptibility of soil to the rhizosphere environment was higher than that of the abiotic. A noticeable change was in some soil physicochemical properties like Na, P, Zn, Cu, C, and sand-to-silt proportion before and after phytoreclamation, but not between the rhizosphere and bulk soil of plantings. Contrastingly, microbial composition and diversity were significantly affected by both turfing and rhizosphere effects and were more susceptible to differences in turfing or not than in planting species. In the turfgrass, the microbiome differences between plants were greater in the rhizosphere than in the surrounding bulk soil, indicating the proximal influence of root exudates. We also found that the main abiotic factors that influenced microbial composition were Na, Zn, NOx, N, and S; as for the phylogenetic assemblages, were by K levels and the increase of silt. Turfgrass decomposes soil aggregates and changes the physicochemical properties, thereby evens the phylogenetic clustering of the soil microbial community. We demonstrated that the deterministic process affects the microbial assemblage and acts as a selective agent of the soil microbiota in fundamental and realized niches. Phytoreclamation may lead to abiotic soil changes that reallocate resources to microbes. This could affect the phylogeny of the microbial assemblages and increase microbial richness.

原文英語
期刊Microbial Ecology
DOIs
出版狀態接受/付印 - 2021

ASJC Scopus subject areas

  • 生態學、進化論、行為學與系統學
  • 生態學
  • 土壤科學

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