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- Title
A heritable symbiont and host‐associated factors shape fungal endophyte communities across spatial scales.
- Authors
Harrison, Joshua G.; Parchman, Thomas L.; Cook, Daniel; Gardner, Dale R.; Forister, Matthew L.; Mommer, Liesje
- Abstract
Microbial ecologists are intensely interested in the processes governing microbial community assembly; however, progress has been limited by a lack of studies that span multiple geographical scales and levels of biological organization.We used high throughput sequencing to characterize foliar fungal endophyte communities and host plant genetic structure both within and among 24 populations of spotted locoweed Astragalus lentiginosus across the Great Basin Desert.Across the Great Basin, both within and among populations of the host plant, fungal endophyte richness was predicted by plant size and variation in the seed‐borne, heritable fungus, Alternaria fulva, which produces the bioactive alkaloid swainsonine.The degree of between‐plant turnover in the endophyte community was inversely related to host plant inbreeding and average plant size and positively related to the relative abundance of A. fulva. Plant size was inversely related to endophyte community richness, both among and within populations. The genetic and physical distance between host populations was not predictive of differences in fungal community structure.Synthesis. Through pairing intensive local and regional sampling, we uncovered a primacy of deterministic forces imposed by a heritable symbiont on the community structure of locoweed endophytes. We characterized fungal endophyte assemblages within Astragalus lentiginosus varieties across the Great Basin Desert using high‐throughput sequencing. Fungal assemblage dissimilarity was not related to genetic distance among host plants. Instead, a heritable fungus which makes a bioactive alkaloid and plant size were the two most important determinants of variation in fungal assemblages.
- Subjects
ENDOPHYTIC fungi; HOST plants; PLANT genetics; ASTRAGALUS (Plants); ALTERNARIA; MICROBIAL ecology
- Publication
Journal of Ecology, 2018, Vol 106, Issue 6, p2274
- ISSN
0022-0477
- Publication type
Article
- DOI
10.1111/1365-2745.12967