Journal
ANNUAL REVIEW OF ECOLOGY, EVOLUTION, AND SYSTEMATICS, VOL 51, 2020
Volume 51, Issue -, Pages 363-386Publisher
ANNUAL REVIEWS
DOI: 10.1146/annurev-ecolsys-011720-013401
Keywords
bee; microbiome assembly; nectar yeast; pollination; species interactions; symbiosis
Categories
Funding
- National Science Foundation [DEB1846266]
- United States Department of Agriculture Cooperative State Research, Education, and Extension Service [NE1501]
- Hellman Foundation
- University of California, Davis
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Flowers at times host abundant and specialized communities of bacteria and fungi that influence floral phenotypes and interactions with pollinators. Ecological processes drive variation in microbial abundance and composition at multiple scales, including among plant species, among flower tissues, and among flowers on the same plant. Variation in microbial effects on floral phenotype suggests that microbial metabolites could cue the presence or quality of rewards for pollinators, but most plants are unlikely to rely on microbes for pollinator attraction or reproduction. From a microbial perspective, flowers offer opportunities to disperse between habitats, but microbial species differ in requirements for and benefits received from such dispersal. The extent to which floral microbes shape the evolution of floral traits, influence fitness of floral visitors, and respond to anthropogenic change is unclear. A deeper understanding of these phenomena could illuminate the ecological and evolutionary importance of floral microbiomes and their role in the conservation of plant-pollinator interactions.
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