Host plant phylogeny predicts arbuscular mycorrhizal fungal communities, but plant life history and fungal genetic change predict feedback
Robert J. Ramos, Brianna L. Richards, Peggy A. Schultz, James D. Bever, Roland Roberts, Roland Roberts, Roland Roberts, Roland Roberts
TL;DR
This study shows that plant phylogeny influences arbuscular mycorrhizal fungal communities, but mutualistic benefits depend more on plant life history and fungal genetic changes.
Contribution
The study reveals that fungal genetic changes, not species composition, predict mycorrhizal feedback strength, linking symbiosis dynamics to plant succession.
Findings
Host phylogeny predicts AM fungal community composition and genetic structure.
Mycorrhizal feedback strength is influenced by plant life history and genetic shifts in fungal species.
Positive feedbacks across life history stages suggest roles in succession and restoration.
Abstract
Symbioses exert strong influence on host phenotypes; however, benefits from symbionts can increase or degrade over time. Understanding the context-dependence of reinforcing or degrading dynamics is pivotal to predicting stability of symbiotic benefits. Host phylogenetic relationships and host life history traits are two candidate axes that have been proposed to structure symbioses. However, the relative influence of host evolutionary history and life history on symbiont composition, and whether changes in symbiont composition translate into stronger mutualistic benefits is unknown. We tested the influence of plant phylogenetic relationships and plant life history on the composition of arbuscular mycorrhizal (AM) fungi, perhaps the most ancestral and influential of plant symbionts, and then tested whether AM fungal differentiation resulted in improved mutualism as expected from…
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Taxonomy
TopicsMycorrhizal Fungi and Plant Interactions · Plant-Microbe Interactions and Immunity · Plant and fungal interactions