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Plant chemical variation mediates soil bacterial community composition
Robert W Buchkowski1,2, Klára Benedek3, János Bálint3
1Department of Biology, University of Western Ontario, 1151 Richmond Street, London, ON, N6A 5B7, Canada. robert.buchkowski@gmail.com.
Scientific Reports
|April 13, 2023
Summary
Plant chemical defenses influence soil microbes. Tansy chemotypes showed soil source, not litter type, primarily shapes microbial communities, with litter acting as a secondary filter.
Area of Science:
- Ecology
- Microbiology
- Biogeochemistry
Background:
- Understanding ecosystem function requires knowledge of plant-microbe interactions.
- Plant chemical defenses (chemotypes) can impact soil microbial communities and nutrient cycling.
Purpose of the Study:
- To investigate how plant antiherbivore chemical defenses influence soil microbial community composition.
- To determine the relative importance of soil source versus plant litter chemotype in shaping soil microbes.
Main Methods:
- Factorial experiment using Tansy plants with varying chemical defense content (chemotypes).
- Assessed soil and chemotype-specific litter effects on soil microbial community composition.
- Analyzed microbial diversity profiles.
Main Results:
- Soil source significantly influenced microbial communities, more so than litter type.
- Plant litter chemotype had a sporadic effect on microbial communities.
- Specific microbial taxa associated with particular Tansy chemotypes were identified.
- Existing soil microbial communities were the primary determinant of litter decomposition microbial communities.
Conclusions:
- The existing soil microbial community is the primary factor shaping litter-associated microbes.
- Plant litter chemotype acts as a secondary filter, influencing microbial community composition.
- Intra-specific variation in plant chemical defenses can shape soil microbial communities.
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