Reduction in vertical transmission rate of bean common mosaic virus in bee-pollinated common bean plants
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jats:titleAbstract</jats:title>jats:pVertical transmission, the transfer of pathogens across generations, is a critical mechanism for the persistence of plant viruses. The transmission mechanisms are diverse, involving direct invasion through the suspensor and virus entry into developing gametes before achieving symplastic isolation. Despite the progress in understanding vertical virus transmission, the environmental factors influencing this process remain largely unexplored. We investigated the complex interplay between vertical transmission of plant viruses and pollination dynamics, focusing on common bean (jats:italicPhaseolus vulgaris</jats:italic>). The intricate relationship between plants and pollinators, especially bees, is essential for global ecosystems and crop productivity. We explored the impact of virus infection on seed transmission rates, with a particular emphasis on bean common mosaic virus (BCMV), bean common mosaic necrosis virus (BCMNV), and cucumber mosaic virus (CMV). Under controlled growth conditions, BCMNV exhibited the highest seed transmission rate, followed by BCMV and CMV. Notably, in the field, bee-pollinated BCMV-infected plants showed a reduced transmission rate compared to self-pollinated plants. This highlights the influence of pollinators on virus transmission dynamics. The findings demonstrate the virus-specific nature of seed transmission and underscore the importance of considering environmental factors, such as pollination, in understanding and managing plant virus spread.</jats:p>
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Acknowledgements: Not applicable.
Funder: Schlumberger Foundation; doi: http://dx.doi.org/10.13039/100002322
Funder: Magdalene College Cambridge
Funder: The Cambridge Trust
Funder: Cambridge Africa
Funder: Cambridge Department of Plant Sciences Frank Smart Studentship
Funder: Cambridge Philosophical Society; doi: http://dx.doi.org/10.13039/100013858
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Royal Society (ICA\R1\201221)
The Leverhulme Trust (RPG-2022-134)