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Updated: Oct 17, 2025
10:20
Linking Predation Risk, Herbivore Physiological Stress and Microbial Decomposition of Plant Litter
Published on: March 12, 2013
13.6K
Conspecific leaf litter induces negative feedbacks in Asteraceae seedlings.
Max M Zaret1,2, Jonathan T Bauer1,3,4, Keith Clay1,5
1Department of Biology, Indiana University, Bloomington, Indiana, USA.
Ecology
|October 9, 2021
Summary
Plant phyllosphere feedbacks (PPFs) are crucial for plant interactions. This study found negative PPFs are common in Asteraceae, impacting plant growth and species interactions, especially in early development.
Area of Science:
- Ecology
- Plant Science
- Microbiology
Background:
- The plant soil feedback (PSF) framework explains how soil microbes affect plant fitness and coexistence.
- Plant phyllosphere feedbacks (PPFs) extend this to aboveground microbes, but experimental data are limited.
- Understanding PPFs' prevalence and drivers is essential for plant ecology.
Purpose of the Study:
- To investigate the prevalence of litter-mediated PPFs in native Asteraceae species.
- To determine if plant functional traits or phylogenetic distance predict PPF strength and direction.
- To assess the impact of PPFs on early plant growth and species interactions.
Main Methods:
- Senesced litter from 10 native Asteraceae species was used to inoculate conspecific and heterospecific seedlings.
- Plant growth was measured to assess the effects of litter treatments.
- Statistical analyses were performed to identify significant feedbacks and predictive factors.
Main Results:
- Negative PPFs were observed in all 10 Asteraceae species studied.
- Four species showed significant growth reduction when exposed to conspecific litter.
- Plant functional traits and phylogenetic distance did not predict the strength or direction of PPFs.
Conclusions:
- Litter-mediated PPFs are common and predominantly negative in native Asteraceae.
- These negative PPFs can significantly influence plant growth and interspecific interactions during early development.
- Further research is needed to identify the mechanisms and traits driving these feedbacks.
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