Rhizosphere-colonizing bacteria persist in the protist microbiome
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View abstract on PubMed
Summary
This summary is machine-generated.Predatory soil protists carry bacterial communities that can colonize plant roots. These protist-associated bacteria can influence plant growth, highlighting their role in the rhizosphere microbiome and sustainable agriculture.
Area Of Science
- Microbiology
- Plant Science
- Ecology
Background
- Soil protists are diverse predators influencing rhizosphere bacteria.
- Protists host their own bacterial microbiomes.
- Previous work showed plants inoculated with protists had similar rhizosphere bacteria to the protist inoculum.
Purpose Of The Study
- To investigate how protist microbiomes affect the rhizosphere.
- To profile bacteria associated with eight diverse rhizosphere protist isolates.
- To compare protist culture microbiomes with maize rhizosphere communities post-inoculation.
Main Methods
- Cultured eight diverse rhizosphere protist isolates for two years.
- Sequenced and profiled bacterial communities within protist cultures.
- Compared protist-associated bacteria with maize rhizosphere bacterial communities six weeks after protist inoculation.
Main Results
- Protist inoculation enriched 13 bacterial amplicon sequence variants (ASVs) in the maize rhizosphere, comprising ~10% of the community.
- A median of 47% of the protist microbiome was highly abundant or enriched in the rhizosphere.
- Three of eight protist cultures positively impacted root biomass, but a mixture did not, indicating context-dependent effects.
- Protist-associated bacteria exhibited varied effects on protist growth in culture.
Conclusions
- Rhizosphere protist cultures, even after long-term lab cultivation, host bacteria capable of colonizing maize rhizospheres.
- Diverse bacteria persist in protist cultures, suggesting protists may support their survival in soil ecosystems.
- These findings identify key rhizosphere-colonizing bacteria associated with protists, with potential applications in sustainable agriculture.
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