Common foliar fungi of Populus trichocarpa modify Melampsora rust disease severity.
Identifieur interne : 000034 ( Main/Exploration ); précédent : 000033; suivant : 000035Common foliar fungi of Populus trichocarpa modify Melampsora rust disease severity.
Auteurs : Posy E. Busby [États-Unis] ; Kabir G. Peay [États-Unis] ; George Newcombe [États-Unis]Source :
- The New phytologist [ 1469-8137 ] ; 2016.
Descripteurs français
- KwdFr :
- MESH :
- microbiologie : Arbres, Feuilles de plante, Maladies des plantes, Populus.
- physiologie : Arbres, Basidiomycota.
- Fonctions de vraisemblance, Modèles linéaires.
English descriptors
- KwdEn :
- MESH :
- microbiology : Plant Diseases, Plant Leaves, Populus, Trees.
- physiology : Basidiomycota, Trees.
- Likelihood Functions, Linear Models.
Abstract
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.
DOI: 10.1111/nph.13742
PubMed: 26565565
Affiliations:
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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. </div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">26565565</PMID><DateCompleted><Year>2016</Year><Month>12</Month><Day>19</Day></DateCompleted><DateRevised><Year>2020</Year><Month>09</Month><Day>30</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1469-8137</ISSN><JournalIssue CitedMedium="Internet"><Volume>209</Volume><Issue>4</Issue><PubDate><Year>2016</Year><Month>Mar</Month></PubDate></JournalIssue><Title>The New phytologist</Title><ISOAbbreviation>New Phytol</ISOAbbreviation></Journal><ArticleTitle>Common foliar fungi of Populus trichocarpa modify Melampsora rust disease severity.</ArticleTitle><Pagination><MedlinePgn>1681-92</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1111/nph.13742</ELocationID><Abstract><AbstractText>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. </AbstractText><CopyrightInformation>© 2015 The Authors. 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Busby</name></noRegion><name sortKey="Busby, Posy E" sort="Busby, Posy E" uniqKey="Busby P" first="Posy E" last="Busby">Posy E. Busby</name><name sortKey="Newcombe, George" sort="Newcombe, George" uniqKey="Newcombe G" first="George" last="Newcombe">George Newcombe</name><name sortKey="Peay, Kabir G" sort="Peay, Kabir G" uniqKey="Peay K" first="Kabir G" last="Peay">Kabir G. Peay</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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