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Growth dynamics of geographically different arbuscular mycorrhizal fungal isolates belonging to the 'Rhizophagus clade' under monoxenic conditions.

Identifieur interne : 001714 ( Main/Exploration ); précédent : 001713; suivant : 001715

Growth dynamics of geographically different arbuscular mycorrhizal fungal isolates belonging to the 'Rhizophagus clade' under monoxenic conditions.

Auteurs : Vanesa Analía Silvani [Oman] ; Laura Fernández Bidondo [Argentine] ; María Josefina Bompadre [Argentine] ; Roxana Paula Colombo [Argentine] ; Mariana Pérgola [Argentine] ; Agustín Bompadre [États-Unis] ; Sebastián Fracchia [Argentine] ; Alicia Godeas [Argentine]

Source :

RBID : pubmed:24891409

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English descriptors

Abstract

The growth dynamics of extraradical mycelium and spore formation of 14 "Rhizophagus" isolates from different sites in Argentina were evaluated under monoxenic conditions. A modified Gompertz model was used to characterize the development of mycelium and spores for each isolate under the same conditions. The lag time, maximal growth rate and total quantity of both extraradical hyphae and spores were determined. Wide variability among isolates was detected, and all growth parameters were significantly altered by fungal isolate. Discriminant analysis differentiated isolates primarily based on the extent of extraradical hyphae produced, yet such differences did not conclusively correspond to phylogenetic relationships among closely related isolates based on partial SSU sequences. Given that the "Rhizophagus" isolates were grown under controlled conditions for many generations, the expression of phenotypic variability could be attributed to genetic differences that are not completely resolved by phylogenetic analysis employing the small ribosomal gene.

DOI: 10.3852/13-118
PubMed: 24891409


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<term>DNA, Fungal (genetics)</term>
<term>DNA, Ribosomal (chemistry)</term>
<term>DNA, Ribosomal (genetics)</term>
<term>Glomeromycota (genetics)</term>
<term>Glomeromycota (growth & development)</term>
<term>Glomeromycota (physiology)</term>
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<term>Mycelium (MeSH)</term>
<term>Mycorrhizae (genetics)</term>
<term>Mycorrhizae (growth & development)</term>
<term>Mycorrhizae (physiology)</term>
<term>Phylogeny (MeSH)</term>
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<term>ADN ribosomique (génétique)</term>
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<term>Données de séquences moléculaires (MeSH)</term>
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<term>Glomeromycota (génétique)</term>
<term>Glomeromycota (physiologie)</term>
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<term>Séquence nucléotidique (MeSH)</term>
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<term>Mycorhizes</term>
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<term>Mycorrhizae</term>
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<term>ADN ribosomique</term>
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<div type="abstract" xml:lang="en">The growth dynamics of extraradical mycelium and spore formation of 14 "Rhizophagus" isolates from different sites in Argentina were evaluated under monoxenic conditions. A modified Gompertz model was used to characterize the development of mycelium and spores for each isolate under the same conditions. The lag time, maximal growth rate and total quantity of both extraradical hyphae and spores were determined. Wide variability among isolates was detected, and all growth parameters were significantly altered by fungal isolate. Discriminant analysis differentiated isolates primarily based on the extent of extraradical hyphae produced, yet such differences did not conclusively correspond to phylogenetic relationships among closely related isolates based on partial SSU sequences. Given that the "Rhizophagus" isolates were grown under controlled conditions for many generations, the expression of phenotypic variability could be attributed to genetic differences that are not completely resolved by phylogenetic analysis employing the small ribosomal gene. </div>
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<AbstractText>The growth dynamics of extraradical mycelium and spore formation of 14 "Rhizophagus" isolates from different sites in Argentina were evaluated under monoxenic conditions. A modified Gompertz model was used to characterize the development of mycelium and spores for each isolate under the same conditions. The lag time, maximal growth rate and total quantity of both extraradical hyphae and spores were determined. Wide variability among isolates was detected, and all growth parameters were significantly altered by fungal isolate. Discriminant analysis differentiated isolates primarily based on the extent of extraradical hyphae produced, yet such differences did not conclusively correspond to phylogenetic relationships among closely related isolates based on partial SSU sequences. Given that the "Rhizophagus" isolates were grown under controlled conditions for many generations, the expression of phenotypic variability could be attributed to genetic differences that are not completely resolved by phylogenetic analysis employing the small ribosomal gene. </AbstractText>
<CopyrightInformation>© 2014 by The Mycological Society of America.</CopyrightInformation>
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<Affiliation>Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales (FCEyN), Universidad de Buenos Aires (UBA), Ciudad Universitaria, 4to piso, Pabellón 2, 1428, Buenos Aires, Argentina.</Affiliation>
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<Affiliation>Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales (FCEyN), Universidad de Buenos Aires (UBA), Ciudad Universitaria, 4to piso, Pabellón 2, 1428, Buenos Aires, Argentina.</Affiliation>
</AffiliationInfo>
</Author>
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<AffiliationInfo>
<Affiliation>Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales (FCEyN), Universidad de Buenos Aires (UBA), Ciudad Universitaria, 4to piso, Pabellón 2, 1428, Buenos Aires, Argentina.</Affiliation>
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</Author>
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<LastName>Bompadre</LastName>
<ForeName>Agustín</ForeName>
<Initials>A</Initials>
<AffiliationInfo>
<Affiliation>SAP Labs, 1251 Waterfront Place, Pittsburgh, Pennsylvania 15222.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Fracchia</LastName>
<ForeName>Sebastián</ForeName>
<Initials>S</Initials>
<AffiliationInfo>
<Affiliation>Centro Regional de Investigaciones Científicas y Transferencia Tecnológica, CRILAR-CONICET, Entre Ríos y Mendoza, 530 Anillaco, La Rioja, Argentina.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Godeas</LastName>
<ForeName>Alicia</ForeName>
<Initials>A</Initials>
<AffiliationInfo>
<Affiliation>Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales (FCEyN), Universidad de Buenos Aires (UBA), Ciudad Universitaria, 4to piso, Pabellón 2, 1428, Buenos Aires, Argentina.</Affiliation>
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<AccessionNumber>JX049519</AccessionNumber>
<AccessionNumber>JX049520</AccessionNumber>
<AccessionNumber>JX049521</AccessionNumber>
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<Month>06</Month>
<Day>02</Day>
</ArticleDate>
</Article>
<MedlineJournalInfo>
<Country>England</Country>
<MedlineTA>Mycologia</MedlineTA>
<NlmUniqueID>0400764</NlmUniqueID>
<ISSNLinking>0027-5514</ISSNLinking>
</MedlineJournalInfo>
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<Chemical>
<RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="D004271">DNA, Fungal</NameOfSubstance>
</Chemical>
<Chemical>
<RegistryNumber>0</RegistryNumber>
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<QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName>
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<MeshHeading>
<DescriptorName UI="D025282" MajorTopicYN="N">Mycelium</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D038821" MajorTopicYN="N">Mycorrhizae</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000254" MajorTopicYN="Y">growth & development</QualifierName>
<QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D010802" MajorTopicYN="N">Phylogeny</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D018517" MajorTopicYN="N">Plant Roots</DescriptorName>
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</MeshHeading>
</MeshHeadingList>
<KeywordList Owner="NOTNLM">
<Keyword MajorTopicYN="N">Glomeromycota</Keyword>
<Keyword MajorTopicYN="N">R. irregularis</Keyword>
<Keyword MajorTopicYN="N">Rhizophagus intraradices</Keyword>
<Keyword MajorTopicYN="N">growth dynamics</Keyword>
<Keyword MajorTopicYN="N">in vitro</Keyword>
<Keyword MajorTopicYN="N">variability</Keyword>
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<Day>4</Day>
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<Hour>6</Hour>
<Minute>0</Minute>
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<Month>5</Month>
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<Hour>6</Hour>
<Minute>0</Minute>
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<ArticleId IdType="doi">10.3852/13-118</ArticleId>
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</pubmed>
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<list>
<country>
<li>Argentine</li>
<li>Oman</li>
<li>États-Unis</li>
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<region>
<li>Pennsylvanie</li>
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<name sortKey="Silvani, Vanesa Analia" sort="Silvani, Vanesa Analia" uniqKey="Silvani V" first="Vanesa Analía" last="Silvani">Vanesa Analía Silvani</name>
</noRegion>
</country>
<country name="Argentine">
<noRegion>
<name sortKey="Bidondo, Laura Fernandez" sort="Bidondo, Laura Fernandez" uniqKey="Bidondo L" first="Laura Fernández" last="Bidondo">Laura Fernández Bidondo</name>
</noRegion>
<name sortKey="Bompadre, Maria Josefina" sort="Bompadre, Maria Josefina" uniqKey="Bompadre M" first="María Josefina" last="Bompadre">María Josefina Bompadre</name>
<name sortKey="Colombo, Roxana Paula" sort="Colombo, Roxana Paula" uniqKey="Colombo R" first="Roxana Paula" last="Colombo">Roxana Paula Colombo</name>
<name sortKey="Fracchia, Sebastian" sort="Fracchia, Sebastian" uniqKey="Fracchia S" first="Sebastián" last="Fracchia">Sebastián Fracchia</name>
<name sortKey="Godeas, Alicia" sort="Godeas, Alicia" uniqKey="Godeas A" first="Alicia" last="Godeas">Alicia Godeas</name>
<name sortKey="Pergola, Mariana" sort="Pergola, Mariana" uniqKey="Pergola M" first="Mariana" last="Pérgola">Mariana Pérgola</name>
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<country name="États-Unis">
<region name="Pennsylvanie">
<name sortKey="Bompadre, Agustin" sort="Bompadre, Agustin" uniqKey="Bompadre A" first="Agustín" last="Bompadre">Agustín Bompadre</name>
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</country>
</tree>
</affiliations>
</record>

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