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

AMHERST, Mass. Like a kindergarten or a busy airport where cold viruses and other germs circulate freely, flowers are common gathering places where pollinators such as bees and butterflies can pick up fungal, bacterial or viral infections that might be as benign as the sniffles or as debilitating as influenza.

But "almost nothing is known regarding how pathogens of pollinators are transmitted at flowers," postdoctoral researcher Scott McArt and Professor Lynn Adler at the University of Massachusetts Amherst write. "As major hubs of plant-animal interactions throughout the world, flowers are ideal venues for the transmission of microbes among plants and animals."

In a recent review in Ecology Letters with colleagues at Yale and the University of Texas at Austin, McArt and Adler survey the literature and identify promising areas for future research on how floral traits influence pathogen transmission.

As the authors point out, "Given recent concerns about pollinator declines caused in part by pathogens, the role of floral traits in mediating pathogen transmission is a key area for further research." They say their synthesis could help efforts to control economically devastating pollinator-vectored plant pathogens such as fire blight, which affects rose family fruits such as apples and pears, and mummyberry disease, which attacks blueberries.

McArt adds, "Our intent with this paper is to stimulate interest in the fascinating yet poorly understood microbial world of flowers. We found several generalities in how plant pathogens are transmitted at flowers, yet the major take-home from our paper may be in pointing out that this is an important gap in our knowledge."

The authors identified 187 studies pertaining to plant pathogens published between 1947 and 2013 in which floral visitors were implicated in transmission and where transmission must have occurred at flowers or pathogen-induced pseudoflowers. Th
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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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