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As hubs for bees and pollinators, flowers may be crucial in disease transmission
Date:2/24/2014

ese are flower-like structures made by a pathogen that can look and smell like a real flower, for example. Regarding animal pathogens, they identified 618 studies published before September 2013 using the same criteria.

"In total, we found eight major groups of animal pathogens that are potentially transmitted at flowers, including a trypanosomatid, fungi, bacteria and RNA viruses," they note. Their paper, "Arranging the bouquet of disease: Floral traits and the transmission of plant and animal pathogens," was featured in the publisher's "News Round-Up" of "most newsworthy research."

Traditionally, research on flower evolution has focused largely on selection by pollinators, but as McArt and colleagues point out, pollinators that also transmit pathogens may reduce the benefits to the plant of attracting them, depending on the costs and benefits of pollination. The researchers say more work is needed before scientists can know whether a flower's chemical or physical traits determine the likelihood that pathogens are transmitted, for example, and whether infection by pathogens is an inevitable consequence of pollinator visitation.

"Plant pathologists have made great strides in identifying floral traits that mediate host plant resistance to floral pathogens in individual systems; synthesizing this literature can provide generality in identifying traits that mediate plant-pathogen dynamics. From the pollinator's perspective, there has been surprisingly little work elucidating the role of flowers and floral traits for pathogen transmission. Given recent concerns about pollinator declines caused in part by pathogens, understanding the role of floral traits in disease transmission is a key missing element," say McArt and colleagues.


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Contact: Janet Lathrop
jlathrop@admin.umass.edu
413-545-0444
University of Massachusetts at Amherst
Source:Eurekalert  

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