Skip to main content
Research article - Peer-reviewed, 2019

Microbial amendments alter protist communities within the soil microbiome

Xiong, Wu; Li, Rong; Guo, Sai; Karlsson, Ida; Jiao, Zixuan; Xun, Weibing; Kowalchuk, George A.; Shen, Qirong; Geisen, Stefan


Plant-beneficial microbes improve while pathogens reduce plant performance. When introduced in soils, such microbes can induce entire microbiome changes. However, the impact of those microbial introductions on protists - key predators within the soil microbiome - remain unknown. Here, we tracked how soil protists respond to bacterial (Bacillus and Ralstonia) and fungal (Trichoderma and Fusarium) introductions, with both microbial groups represented by one beneficial and one pathogenic taxon. We found that plant-beneficial Bacillus bacteria change the protist community structure. This community-shift was likely induced by an increased fungi/bacteria ratio, supported by a negative correlation of the fungi/bacteria ratio with the relative abundance of phagotrophic protists across all treatments. Our results indicate that microbial introductions can impact protist communities, thereby altering microbiome-derived multi-functionality.


Beneficial microbes; Bacillus; Fungi/bacteria ratio; Soil protists; Soil function

Published in

Soil Biology and Biochemistry
2019, volume: 135, pages: 379-382

Authors' information

Xiong, Wu
Utrecht University
Li, Rong
Nanjing Agricultural University
Guo, Sai
Nanjing Agricultural University
Karlsson, Ida
Utrecht University
Karlsson, Ida
Swedish University of Agricultural Sciences, Department of Forest Mycology and Plant Pathology
Jiao, Zixuan
Nanjing Agricultural University
Xun, Weibing
Nanjing Agricultural University
Kowalchuk, George A.
Utrecht University
Shen, Qirong
Nanjing Agricultural University
Geisen, Stefan
Netherlands Institute of Ecology (NIOO-KNAW)

UKÄ Subject classification

Soil Science

Publication Identifiers


URI (permanent link to this page)