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Analyses of the temporal dynamics of fungal communities colonizing the healthy wood tissues of esca leaf-symptomatic and asymptomatic vines.

Identifieur interne : 000538 ( Main/Exploration ); précédent : 000537; suivant : 000539

Analyses of the temporal dynamics of fungal communities colonizing the healthy wood tissues of esca leaf-symptomatic and asymptomatic vines.

Auteurs : Emilie Bruez [France] ; Jessica Vallance [France] ; Jonathan Gerbore [France] ; Pascal Lecomte [France] ; Jean-Pierre Da Costa [France] ; Lucia Guerin-Dubrana [France] ; Patrice Rey [France]

Source :

RBID : pubmed:24788412

Descripteurs français

English descriptors

Abstract

Esca, a Grapevine Trunk Disease (GTD), is of major concern for viticulture worldwide. Our study compares the fungal communities that inhabit the wood tissues of vines that expressed or not foliar esca-symptoms. The trunk and rootstock tissues were apparently healthy, whether the 10 year-old plants were symptomatic or not. The only difference was in the cordon, which contained white rot, a typical form of esca, in 79% of symptomatic plants. Observations over a period of one year using a fingerprint method, Single Strand Conformation Polymorphism (SSCP), and the ITS-DNA sequencing of cultivable fungi, showed that shifts occurred in the fungal communities colonizing the healthy wood tissues. However, whatever the sampling time, spring, summer, autumn or winter, the fungi colonizing the healthy tissues of asymptomatic or symptomatic plants were not significantly different. Forty-eight genera were isolated, with species of Hypocreaceae and Botryosphaeriaceae being the most abundant species. Diverse fungal assemblages, made up of potentially plant-pathogenic and -protective fungi, colonized these non-necrotic tissues. Some fungi, possibly involved in GTD, inhabited the non-necrotic wood of young plants, but no increase in necrosis areas was observed over the one-year period.

DOI: 10.1371/journal.pone.0095928
PubMed: 24788412
PubMed Central: PMC4006835


Affiliations:


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Le document en format XML

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<term>Fungi (genetics)</term>
<term>Haplotypes (MeSH)</term>
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<term>Plant Diseases (microbiology)</term>
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<term>Champignons (classification)</term>
<term>Champignons (génétique)</term>
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<term>Haplotypes (MeSH)</term>
<term>Maladies des plantes (microbiologie)</term>
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<div type="abstract" xml:lang="en">Esca, a Grapevine Trunk Disease (GTD), is of major concern for viticulture worldwide. Our study compares the fungal communities that inhabit the wood tissues of vines that expressed or not foliar esca-symptoms. The trunk and rootstock tissues were apparently healthy, whether the 10 year-old plants were symptomatic or not. The only difference was in the cordon, which contained white rot, a typical form of esca, in 79% of symptomatic plants. Observations over a period of one year using a fingerprint method, Single Strand Conformation Polymorphism (SSCP), and the ITS-DNA sequencing of cultivable fungi, showed that shifts occurred in the fungal communities colonizing the healthy wood tissues. However, whatever the sampling time, spring, summer, autumn or winter, the fungi colonizing the healthy tissues of asymptomatic or symptomatic plants were not significantly different. Forty-eight genera were isolated, with species of Hypocreaceae and Botryosphaeriaceae being the most abundant species. Diverse fungal assemblages, made up of potentially plant-pathogenic and -protective fungi, colonized these non-necrotic tissues. Some fungi, possibly involved in GTD, inhabited the non-necrotic wood of young plants, but no increase in necrosis areas was observed over the one-year period. </div>
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<AbstractText>Esca, a Grapevine Trunk Disease (GTD), is of major concern for viticulture worldwide. Our study compares the fungal communities that inhabit the wood tissues of vines that expressed or not foliar esca-symptoms. The trunk and rootstock tissues were apparently healthy, whether the 10 year-old plants were symptomatic or not. The only difference was in the cordon, which contained white rot, a typical form of esca, in 79% of symptomatic plants. Observations over a period of one year using a fingerprint method, Single Strand Conformation Polymorphism (SSCP), and the ITS-DNA sequencing of cultivable fungi, showed that shifts occurred in the fungal communities colonizing the healthy wood tissues. However, whatever the sampling time, spring, summer, autumn or winter, the fungi colonizing the healthy tissues of asymptomatic or symptomatic plants were not significantly different. Forty-eight genera were isolated, with species of Hypocreaceae and Botryosphaeriaceae being the most abundant species. Diverse fungal assemblages, made up of potentially plant-pathogenic and -protective fungi, colonized these non-necrotic tissues. Some fungi, possibly involved in GTD, inhabited the non-necrotic wood of young plants, but no increase in necrosis areas was observed over the one-year period. </AbstractText>
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<Affiliation>Université de Bordeaux, ISVV, UMR1065 Santé et Agroécologie du Vignoble (SAVE), Bordeaux Sciences Agro, Villenave d'Ornon, France; INRA, ISVV, UMR1065 SAVE, Villenave d'Ornon, France.</Affiliation>
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<Reference>
<Citation>C R Biol. 2009 Sep;332(9):765-83</Citation>
<ArticleIdList>
<ArticleId IdType="pubmed">19748452</ArticleId>
</ArticleIdList>
</Reference>
<Reference>
<Citation>Phytopathology. 2007 Oct;97(10):1284-9</Citation>
<ArticleIdList>
<ArticleId IdType="pubmed">18943686</ArticleId>
</ArticleIdList>
</Reference>
<Reference>
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</Reference>
<Reference>
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<ArticleIdList>
<ArticleId IdType="pubmed">17503580</ArticleId>
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</Reference>
<Reference>
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<ArticleIdList>
<ArticleId IdType="pubmed">19447961</ArticleId>
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<Reference>
<Citation>Philos Trans R Soc Lond B Biol Sci. 2005 Feb 28;360(1454):243-54</Citation>
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<ArticleId IdType="pubmed">15814343</ArticleId>
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<Reference>
<Citation>New Phytol. 2010 Apr;186(2):281-5</Citation>
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<name sortKey="Da Costa, Jean Pierre" sort="Da Costa, Jean Pierre" uniqKey="Da Costa J" first="Jean-Pierre" last="Da Costa">Jean-Pierre Da Costa</name>
<name sortKey="Gerbore, Jonathan" sort="Gerbore, Jonathan" uniqKey="Gerbore J" first="Jonathan" last="Gerbore">Jonathan Gerbore</name>
<name sortKey="Guerin Dubrana, Lucia" sort="Guerin Dubrana, Lucia" uniqKey="Guerin Dubrana L" first="Lucia" last="Guerin-Dubrana">Lucia Guerin-Dubrana</name>
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<name sortKey="Vallance, Jessica" sort="Vallance, Jessica" uniqKey="Vallance J" first="Jessica" last="Vallance">Jessica Vallance</name>
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