Flowers as viral hot spots: Honey bees (Apis mellifera) unevenly deposit viruses across plant species
Autoři:
Samantha A. Alger aff001; P. Alexander Burnham aff001; Alison K. Brody aff001
Působiště autorů:
Biology Department, University of Vermont, Burlington, Vermont, United States of America
aff001
Vyšlo v časopise:
PLoS ONE 14(9)
Kategorie:
Research Article
prolekare.web.journal.doi_sk:
https://doi.org/10.1371/journal.pone.0221800
Souhrn
RNA viruses, once considered specific to honey bees, are suspected of spilling over from managed bees into wild pollinators; however, transmission routes are largely unknown. A widely accepted yet untested hypothesis states that flowers serve as bridges in the transmission of viruses between bees. Here, using a series of controlled experiments with captive bee colonies, we examined the role of flowers in bee virus transmission. We first examined if honey bees deposit viruses on flowers and whether bumble bees become infected after visiting contaminated flowers. We then examined whether plant species differ in their propensity to harbor viruses and if bee visitation rates increase the likelihood of virus deposition on flowers. Our experiment demonstrated, for the first time, that honey bees deposit viruses on flowers. However, the two viruses we examined, black queen cell virus (BQCV) and deformed wing virus (DWV), were not equally distributed across plant species, suggesting that differences in floral traits, virus ecology and/or foraging behavior may mediate the likelihood of deposition. Bumble bees did not become infected after visiting flowers previously visited by honey bees suggesting that transmission via flowers may be a rare occurrence and contingent on multiplicative factors and probabilities such as infectivity of virus strain across bee species, immunocompetence, virus virulence, virus load, and the probability a bumble bee will contact a virus particle on a flower. Our study is among the first to experimentally examine the role of flowers in bee virus transmission and uncovers promising avenues for future research.
Klíčová slova:
Biology and life sciences – Plant science – Organisms – Eukaryota – Plants – Psychology – Animals – Invertebrates – Arthropoda – Insects – Hymenoptera – Social sciences – Zoology – Viruses – RNA viruses – Behavior – Plant anatomy – Animal behavior – Foraging – Flowering plants – Bees – Honey bees – Flowers – Inflorescences
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