Phytophthora parasitica biofilm formation: installation and organization of microcolonies on the surface of a host plant.
Identifieur interne : 001C48 ( Main/Exploration ); précédent : 001C47; suivant : 001C49Phytophthora parasitica biofilm formation: installation and organization of microcolonies on the surface of a host plant.
Auteurs : Eric Galiana [France] ; Sandra Fourré ; Gilbert EnglerSource :
- Environmental microbiology [ 1462-2920 ] ; 2008.
Descripteurs français
- KwdFr :
- MESH :
- parasitologie : Feuilles de plante, Maladies des plantes, Tabac.
- physiologie : Communication cellulaire, Mouvement cellulaire, Phytophthora.
- Animaux, Biofilms.
English descriptors
- KwdEn :
- MESH :
- parasitology : Plant Diseases, Plant Leaves, Tobacco.
- physiology : Cell Communication, Cell Movement, Phytophthora.
- Animals, Biofilms.
Abstract
Zoospores of the oomycete Phytophthora parasitica establish microbial spheroid microcolonies and biofilms on the surface of wounded leaves of their host, Nicotiana tabacum. The formation of microcolonies involves the movement of some zoospores towards attractants from wound sites, followed by their irreversible adsorption and the formation of a cluster of cells. These cells drive the migration of a second wave of zoospores (several hundreds cells) by setting up an external chemotactic gradient leading to massive zoospore encystment and cyst-orientated germination. Zoospores that are still swimming at this stage circulate within the nascent biofilm by opening channels. Concomitantly, the cell population secretes various substances to elaborate an extracellular mucilage. Embedded within the extracellular matrix, biofilm cells are organized into a structured community as coacervates. The granular surface is composed of individual cysts, located on the outside of the microcolony. Hyphae from these cysts plunge downwards towards the dense core formed by the founder cells. This report is the first to show the installation and organization of a biofilm formed by eukaryotic cells on plant surfaces. The P. parasitica microcolonies constitute heterogeneous microenvironments for the embedded and circulating cells. They may affect plant-pathogen interactions by serving as reservoirs for pathogenic microorganisms, as protecting niche against host defences or as structures for infecting populations.
DOI: 10.1111/j.1462-2920.2008.01619.x
PubMed: 18430009
Affiliations:
Links toward previous steps (curation, corpus...)
Le document en format XML
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The formation of microcolonies involves the movement of some zoospores towards attractants from wound sites, followed by their irreversible adsorption and the formation of a cluster of cells. These cells drive the migration of a second wave of zoospores (several hundreds cells) by setting up an external chemotactic gradient leading to massive zoospore encystment and cyst-orientated germination. Zoospores that are still swimming at this stage circulate within the nascent biofilm by opening channels. Concomitantly, the cell population secretes various substances to elaborate an extracellular mucilage. Embedded within the extracellular matrix, biofilm cells are organized into a structured community as coacervates. The granular surface is composed of individual cysts, located on the outside of the microcolony. Hyphae from these cysts plunge downwards towards the dense core formed by the founder cells. This report is the first to show the installation and organization of a biofilm formed by eukaryotic cells on plant surfaces. The P. parasitica microcolonies constitute heterogeneous microenvironments for the embedded and circulating cells. They may affect plant-pathogen interactions by serving as reservoirs for pathogenic microorganisms, as protecting niche against host defences or as structures for infecting populations.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">18430009</PMID><DateCompleted><Year>2010</Year><Month>03</Month><Day>08</Day></DateCompleted><DateRevised><Year>2008</Year><Month>07</Month><Day>30</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1462-2920</ISSN><JournalIssue CitedMedium="Internet"><Volume>10</Volume><Issue>8</Issue><PubDate><Year>2008</Year><Month>Aug</Month></PubDate></JournalIssue><Title>Environmental microbiology</Title><ISOAbbreviation>Environ Microbiol</ISOAbbreviation></Journal><ArticleTitle>Phytophthora parasitica biofilm formation: installation and organization of microcolonies on the surface of a host plant.</ArticleTitle><Pagination><MedlinePgn>2164-71</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1111/j.1462-2920.2008.01619.x</ELocationID><Abstract><AbstractText>Zoospores of the oomycete Phytophthora parasitica establish microbial spheroid microcolonies and biofilms on the surface of wounded leaves of their host, Nicotiana tabacum. The formation of microcolonies involves the movement of some zoospores towards attractants from wound sites, followed by their irreversible adsorption and the formation of a cluster of cells. These cells drive the migration of a second wave of zoospores (several hundreds cells) by setting up an external chemotactic gradient leading to massive zoospore encystment and cyst-orientated germination. Zoospores that are still swimming at this stage circulate within the nascent biofilm by opening channels. Concomitantly, the cell population secretes various substances to elaborate an extracellular mucilage. Embedded within the extracellular matrix, biofilm cells are organized into a structured community as coacervates. The granular surface is composed of individual cysts, located on the outside of the microcolony. Hyphae from these cysts plunge downwards towards the dense core formed by the founder cells. This report is the first to show the installation and organization of a biofilm formed by eukaryotic cells on plant surfaces. The P. parasitica microcolonies constitute heterogeneous microenvironments for the embedded and circulating cells. They may affect plant-pathogen interactions by serving as reservoirs for pathogenic microorganisms, as protecting niche against host defences or as structures for infecting populations.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Galiana</LastName><ForeName>Eric</ForeName><Initials>E</Initials><AffiliationInfo><Affiliation>UMR 1301 Interactions Biotiques et Santé Végétale, INRA-Université Nice Sophia-Antipolis-CNRS, F 06903 Sophia Antipolis Cedex, France. galiana@sophia.inra.fr</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Fourré</LastName><ForeName>Sandra</ForeName><Initials>S</Initials></Author><Author ValidYN="Y"><LastName>Engler</LastName><ForeName>Gilbert</ForeName><Initials>G</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2008</Year><Month>04</Month><Day>21</Day></ArticleDate></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>Environ Microbiol</MedlineTA><NlmUniqueID>100883692</NlmUniqueID><ISSNLinking>1462-2912</ISSNLinking></MedlineJournalInfo><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D000818" MajorTopicYN="N">Animals</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D018441" MajorTopicYN="Y">Biofilms</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D002450" MajorTopicYN="N">Cell Communication</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D002465" MajorTopicYN="N">Cell Movement</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D010838" MajorTopicYN="N">Phytophthora</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D010935" MajorTopicYN="N">Plant Diseases</DescriptorName><QualifierName UI="Q000469" MajorTopicYN="Y">parasitology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018515" MajorTopicYN="N">Plant Leaves</DescriptorName><QualifierName UI="Q000469" MajorTopicYN="Y">parasitology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D014026" MajorTopicYN="N">Tobacco</DescriptorName><QualifierName UI="Q000469" MajorTopicYN="Y">parasitology</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="pubmed"><Year>2008</Year><Month>4</Month><Day>24</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2010</Year><Month>3</Month><Day>10</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2008</Year><Month>4</Month><Day>24</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">18430009</ArticleId><ArticleId IdType="pii">EMI1619</ArticleId><ArticleId IdType="doi">10.1111/j.1462-2920.2008.01619.x</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>France</li></country><region><li>Provence-Alpes-Côte d'Azur</li></region><settlement><li>Sophia Antipolis</li></settlement></list><tree><noCountry><name sortKey="Engler, Gilbert" sort="Engler, Gilbert" uniqKey="Engler G" first="Gilbert" last="Engler">Gilbert Engler</name><name sortKey="Fourre, Sandra" sort="Fourre, Sandra" uniqKey="Fourre S" first="Sandra" last="Fourré">Sandra Fourré</name></noCountry><country name="France"><region name="Provence-Alpes-Côte d'Azur"><name sortKey="Galiana, Eric" sort="Galiana, Eric" uniqKey="Galiana E" first="Eric" last="Galiana">Eric Galiana</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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