Common foliar fungi of Populus trichocarpa modify Melampsora rust disease severity

© 2015 The Authors. New Phytologist © 2015 New Phytologist Trust.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1990. - 209(2016), 4 vom: 13. März, Seite 1681-92
1. Verfasser: Busby, Posy E (VerfasserIn)
Weitere Verfasser: Peay, Kabir G, Newcombe, George
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2016
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Alternaria Cladosporium Epicoccum Trichoderma endophyte genetic resistance phyllosphere plant defense
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520 |a Nonpathogenic foliar fungi (i.e. endophytes and epiphytes) can modify plant disease severity in controlled experiments. However, experiments have not been combined with ecological studies in wild plant pathosystems to determine whether disease-modifying fungi are common enough to be ecologically important. We used culture-based methods and DNA sequencing to characterize the abundance and distribution of foliar fungi of Populus trichocarpa in wild populations across its native range (Pacific Northwest, USA). We conducted complementary, manipulative experiments to test how foliar fungi commonly isolated from those populations influence the severity of Melampsora leaf rust disease. Finally, we examined correlative relationships between the abundance of disease-modifying foliar fungi and disease severity in wild trees. A taxonomically and geographically diverse group of common foliar fungi significantly modified disease severity in experiments, either increasing or decreasing disease severity. Spatial patterns in the abundance of some of these foliar fungi were significantly correlated (in predicted directions) with disease severity in wild trees. Our study reveals that disease modification is an ecological function shared by common foliar fungal symbionts of P. trichocarpa. This finding raises new questions about plant disease ecology and plant biodiversity, and has applied potential for disease management 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a Research Support, U.S. Gov't, Non-P.H.S. 
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650 4 |a Cladosporium 
650 4 |a Epicoccum 
650 4 |a Trichoderma 
650 4 |a endophyte 
650 4 |a genetic resistance 
650 4 |a phyllosphere 
650 4 |a plant defense 
700 1 |a Peay, Kabir G  |e verfasserin  |4 aut 
700 1 |a Newcombe, George  |e verfasserin  |4 aut 
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