Variability in Pathogenicity among Phytophthora spp. Isolated from Citrus in Corsica
Identifieur interne : 001965 ( Istex/Corpus ); précédent : 001964; suivant : 001966Variability in Pathogenicity among Phytophthora spp. Isolated from Citrus in Corsica
Auteurs : C. Vernière ; S. Cohen ; B. Raffanel ; A. Dubois ; P. Venard ; F. PanabièresSource :
- Journal of Phytopathology [ 0931-1785 ] ; 2004-09.
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Abstract
Gummosis, caused by several Phytophthora species, is one of the most serious constraints to citrus production in Corsica. The current Phytophthora population on citrus trees is mainly composed of P. citrophthora divided into two major groups, namely G1 and G2, with two additional minor groups. Following changes in cultural practices, favourable climatic conditions, and introduction of new hosts, repeated gummosis outbreaks have been observed. The pathogenicity of several Phytophthora isolates of each group collected in citrus groves was assessed for gummosis disease on 20 citrus scion and rootstock cultivars. All isolates tested proved virulent on citrus but extensive pathogenicity differences were observed among and within Phytophthora groups. The data indicate that G1 isolates of P. citrophthora are pathogenic to resistant rootstocks such as Poncirus trifoliata or Carrizo citrange, and moderately aggressive towards scions. In contrast, isolates of the group G2 tend to display a greater aggressiveness to a number of scion cultivars, but are not virulent to P. trifoliata and its hybrids. Implications of these data on disease management are discussed.
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DOI: 10.1111/j.1439-0434.2004.00878.x
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Vernière</name><affiliation><mods:affiliation>Authors’ addresses: 1INRA‐CIRAD, Station de Recherches Agronomiques de San Giuliano, F‐20200, San Nicolao, Corsica, France; 2INRA, Unité Interactions Plantes‐Microorganismes et Santé Végétale, F‐06606 Antibes cédex, France; 3Present address: CIRAD‐FHLOR, TA50/PS4, F‐34398, Montpellier cédex 5, France (correspondence to C. Vernière. E‐mail: verniere@cirad.fr)</mods:affiliation></affiliation></author><author><name sortKey="Cohen, S" sort="Cohen, S" uniqKey="Cohen S" first="S." last="Cohen">S. Cohen</name><affiliation><mods:affiliation>Authors’ addresses: 1INRA‐CIRAD, Station de Recherches Agronomiques de San Giuliano, F‐20200, San Nicolao, Corsica, France; 2INRA, Unité Interactions Plantes‐Microorganismes et Santé Végétale, F‐06606 Antibes cédex, France; 3Present address: CIRAD‐FHLOR, TA50/PS4, F‐34398, Montpellier cédex 5, France (correspondence to C. Vernière. 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E‐mail: verniere@cirad.fr)</mods:affiliation></affiliation></author><author><name sortKey="Panabieres, F" sort="Panabieres, F" uniqKey="Panabieres F" first="F." last="Panabières">F. Panabières</name><affiliation><mods:affiliation>Authors’ addresses: 1INRA‐CIRAD, Station de Recherches Agronomiques de San Giuliano, F‐20200, San Nicolao, Corsica, France; 2INRA, Unité Interactions Plantes‐Microorganismes et Santé Végétale, F‐06606 Antibes cédex, France; 3Present address: CIRAD‐FHLOR, TA50/PS4, F‐34398, Montpellier cédex 5, France (correspondence to C. Vernière. 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The current Phytophthora population on citrus trees is mainly composed of P. citrophthora divided into two major groups, namely G1 and G2, with two additional minor groups. Following changes in cultural practices, favourable climatic conditions, and introduction of new hosts, repeated gummosis outbreaks have been observed. The pathogenicity of several Phytophthora isolates of each group collected in citrus groves was assessed for gummosis disease on 20 citrus scion and rootstock cultivars. All isolates tested proved virulent on citrus but extensive pathogenicity differences were observed among and within Phytophthora groups. The data indicate that G1 isolates of P. citrophthora are pathogenic to resistant rootstocks such as Poncirus trifoliata or Carrizo citrange, and moderately aggressive towards scions. In contrast, isolates of the group G2 tend to display a greater aggressiveness to a number of scion cultivars, but are not virulent to P. trifoliata and its hybrids. Implications of these data on disease management are discussed.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>C. Vernière</name><affiliations><json:string>Authors’ addresses: 1INRA‐CIRAD, Station de Recherches Agronomiques de San Giuliano, F‐20200, San Nicolao, Corsica, France; 2INRA, Unité Interactions Plantes‐Microorganismes et Santé Végétale, F‐06606 Antibes cédex, France; 3Present address: CIRAD‐FHLOR, TA50/PS4, F‐34398, Montpellier cédex 5, France (correspondence to C. Vernière. E‐mail: verniere@cirad.fr)</json:string></affiliations></json:item><json:item><name>S. Cohen</name><affiliations><json:string>Authors’ addresses: 1INRA‐CIRAD, Station de Recherches Agronomiques de San Giuliano, F‐20200, San Nicolao, Corsica, France; 2INRA, Unité Interactions Plantes‐Microorganismes et Santé Végétale, F‐06606 Antibes cédex, France; 3Present address: CIRAD‐FHLOR, TA50/PS4, F‐34398, Montpellier cédex 5, France (correspondence to C. Vernière. E‐mail: verniere@cirad.fr)</json:string></affiliations></json:item><json:item><name>B. Raffanel</name><affiliations><json:string>Authors’ addresses: 1INRA‐CIRAD, Station de Recherches Agronomiques de San Giuliano, F‐20200, San Nicolao, Corsica, France; 2INRA, Unité Interactions Plantes‐Microorganismes et Santé Végétale, F‐06606 Antibes cédex, France; 3Present address: CIRAD‐FHLOR, TA50/PS4, F‐34398, Montpellier cédex 5, France (correspondence to C. Vernière. E‐mail: verniere@cirad.fr)</json:string></affiliations></json:item><json:item><name>A. Dubois</name><affiliations><json:string>Authors’ addresses: 1INRA‐CIRAD, Station de Recherches Agronomiques de San Giuliano, F‐20200, San Nicolao, Corsica, France; 2INRA, Unité Interactions Plantes‐Microorganismes et Santé Végétale, F‐06606 Antibes cédex, France; 3Present address: CIRAD‐FHLOR, TA50/PS4, F‐34398, Montpellier cédex 5, France (correspondence to C. Vernière. E‐mail: verniere@cirad.fr)</json:string></affiliations></json:item><json:item><name>P. Venard</name><affiliations><json:string>Authors’ addresses: 1INRA‐CIRAD, Station de Recherches Agronomiques de San Giuliano, F‐20200, San Nicolao, Corsica, France; 2INRA, Unité Interactions Plantes‐Microorganismes et Santé Végétale, F‐06606 Antibes cédex, France; 3Present address: CIRAD‐FHLOR, TA50/PS4, F‐34398, Montpellier cédex 5, France (correspondence to C. Vernière. E‐mail: verniere@cirad.fr)</json:string></affiliations></json:item><json:item><name>F. Panabières</name><affiliations><json:string>Authors’ addresses: 1INRA‐CIRAD, Station de Recherches Agronomiques de San Giuliano, F‐20200, San Nicolao, Corsica, France; 2INRA, Unité Interactions Plantes‐Microorganismes et Santé Végétale, F‐06606 Antibes cédex, France; 3Present address: CIRAD‐FHLOR, TA50/PS4, F‐34398, Montpellier cédex 5, France (correspondence to C. Vernière. E‐mail: verniere@cirad.fr)</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>Gummosis</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Phytophthora</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>rootstock resistance</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>disease control</value></json:item></subject><articleId><json:string>JPH878</json:string></articleId><language><json:string>eng</json:string></language><originalGenre><json:string>article</json:string></originalGenre><abstract>Gummosis, caused by several Phytophthora species, is one of the most serious constraints to citrus production in Corsica. The current Phytophthora population on citrus trees is mainly composed of P. citrophthora divided into two major groups, namely G1 and G2, with two additional minor groups. Following changes in cultural practices, favourable climatic conditions, and introduction of new hosts, repeated gummosis outbreaks have been observed. The pathogenicity of several Phytophthora isolates of each group collected in citrus groves was assessed for gummosis disease on 20 citrus scion and rootstock cultivars. All isolates tested proved virulent on citrus but extensive pathogenicity differences were observed among and within Phytophthora groups. The data indicate that G1 isolates of P. citrophthora are pathogenic to resistant rootstocks such as Poncirus trifoliata or Carrizo citrange, and moderately aggressive towards scions. In contrast, isolates of the group G2 tend to display a greater aggressiveness to a number of scion cultivars, but are not virulent to P. trifoliata and its hybrids. 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Vernière. E‐mail: verniere@cirad.fr)</affiliation></author><author xml:id="author-2"><persName><forename type="first">S.</forename><surname>Cohen</surname></persName><affiliation>Authors’ addresses: 1INRA‐CIRAD, Station de Recherches Agronomiques de San Giuliano, F‐20200, San Nicolao, Corsica, France; 2INRA, Unité Interactions Plantes‐Microorganismes et Santé Végétale, F‐06606 Antibes cédex, France; 3Present address: CIRAD‐FHLOR, TA50/PS4, F‐34398, Montpellier cédex 5, France (correspondence to C. Vernière. E‐mail: verniere@cirad.fr)</affiliation></author><author xml:id="author-3"><persName><forename type="first">B.</forename><surname>Raffanel</surname></persName><affiliation>Authors’ addresses: 1INRA‐CIRAD, Station de Recherches Agronomiques de San Giuliano, F‐20200, San Nicolao, Corsica, France; 2INRA, Unité Interactions Plantes‐Microorganismes et Santé Végétale, F‐06606 Antibes cédex, France; 3Present address: CIRAD‐FHLOR, TA50/PS4, F‐34398, Montpellier cédex 5, France (correspondence to C. Vernière. E‐mail: verniere@cirad.fr)</affiliation></author><author xml:id="author-4"><persName><forename type="first">A.</forename><surname>Dubois</surname></persName><affiliation>Authors’ addresses: 1INRA‐CIRAD, Station de Recherches Agronomiques de San Giuliano, F‐20200, San Nicolao, Corsica, France; 2INRA, Unité Interactions Plantes‐Microorganismes et Santé Végétale, F‐06606 Antibes cédex, France; 3Present address: CIRAD‐FHLOR, TA50/PS4, F‐34398, Montpellier cédex 5, France (correspondence to C. Vernière. E‐mail: verniere@cirad.fr)</affiliation></author><author xml:id="author-5"><persName><forename type="first">P.</forename><surname>Venard</surname></persName><affiliation>Authors’ addresses: 1INRA‐CIRAD, Station de Recherches Agronomiques de San Giuliano, F‐20200, San Nicolao, Corsica, France; 2INRA, Unité Interactions Plantes‐Microorganismes et Santé Végétale, F‐06606 Antibes cédex, France; 3Present address: CIRAD‐FHLOR, TA50/PS4, F‐34398, Montpellier cédex 5, France (correspondence to C. Vernière. E‐mail: verniere@cirad.fr)</affiliation></author><author xml:id="author-6"><persName><forename type="first">F.</forename><surname>Panabières</surname></persName><affiliation>Authors’ addresses: 1INRA‐CIRAD, Station de Recherches Agronomiques de San Giuliano, F‐20200, San Nicolao, Corsica, France; 2INRA, Unité Interactions Plantes‐Microorganismes et Santé Végétale, F‐06606 Antibes cédex, France; 3Present address: CIRAD‐FHLOR, TA50/PS4, F‐34398, Montpellier cédex 5, France (correspondence to C. Vernière. E‐mail: verniere@cirad.fr)</affiliation></author></analytic><monogr><title level="j">Journal of Phytopathology</title><idno type="pISSN">0931-1785</idno><idno type="eISSN">1439-0434</idno><idno type="DOI">10.1111/(ISSN)1439-0434</idno><imprint><publisher>Blackwell Verlag GmbH</publisher><pubPlace>Berlin, Germany</pubPlace><date type="published" when="2004-09"></date><biblScope unit="volume">152</biblScope><biblScope unit="issue">8‐9</biblScope><biblScope unit="page" from="476">476</biblScope><biblScope unit="page" to="483">483</biblScope></imprint></monogr><idno type="istex">CC66AAD77E8A698711D827E5DD151338F97DB45C</idno><idno type="DOI">10.1111/j.1439-0434.2004.00878.x</idno><idno type="ArticleID">JPH878</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2004</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>Gummosis, caused by several Phytophthora species, is one of the most serious constraints to citrus production in Corsica. The current Phytophthora population on citrus trees is mainly composed of P. citrophthora divided into two major groups, namely G1 and G2, with two additional minor groups. Following changes in cultural practices, favourable climatic conditions, and introduction of new hosts, repeated gummosis outbreaks have been observed. The pathogenicity of several Phytophthora isolates of each group collected in citrus groves was assessed for gummosis disease on 20 citrus scion and rootstock cultivars. All isolates tested proved virulent on citrus but extensive pathogenicity differences were observed among and within Phytophthora groups. The data indicate that G1 isolates of P. citrophthora are pathogenic to resistant rootstocks such as Poncirus trifoliata or Carrizo citrange, and moderately aggressive towards scions. In contrast, isolates of the group G2 tend to display a greater aggressiveness to a number of scion cultivars, but are not virulent to P. trifoliata and its hybrids. Implications of these data on disease management are discussed.</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>keywords</head><item><term>Gummosis</term></item><item><term>Phytophthora</term></item><item><term>rootstock resistance</term></item><item><term>disease control</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2004-09">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><original>false</original><mimetype>text/plain</mimetype><extension>txt</extension><uri>https://api.istex.fr/document/CC66AAD77E8A698711D827E5DD151338F97DB45C/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component version="2.0" type="serialArticle" xml:lang="en"><header><publicationMeta level="product"><publisherInfo><publisherName>Blackwell Verlag GmbH</publisherName><publisherLoc>Berlin, Germany</publisherLoc></publisherInfo><doi origin="wiley" registered="yes">10.1111/(ISSN)1439-0434</doi><issn type="print">0931-1785</issn><issn type="electronic">1439-0434</issn><idGroup><id type="product" value="JPH"></id><id type="publisherDivision" value="ST"></id></idGroup><titleGroup><title type="main" sort="JOURNAL OF PHYTOPATHOLOGY">Journal of Phytopathology</title></titleGroup></publicationMeta><publicationMeta level="part" position="09008"><doi origin="wiley">10.1111/jph.2004.152.issue-8-9</doi><numberingGroup><numbering type="journalVolume" number="152">152</numbering><numbering type="journalIssue">8‐9</numbering></numberingGroup><coverDate startDate="2004-09">September 2004</coverDate></publicationMeta><publicationMeta level="unit" type="article" position="6" status="forIssue"><doi origin="wiley">10.1111/j.1439-0434.2004.00878.x</doi><idGroup><id type="unit" value="JPH878"></id></idGroup><countGroup><count type="pageTotal" number="8"></count></countGroup><titleGroup><title type="tocHeading1">Original Articles</title></titleGroup><eventGroup><event type="firstOnline" date="2004-09-20"></event><event type="publishedOnlineFinalForm" date="2004-09-20"></event><event type="xmlConverted" agent="Converter:BPG_TO_WML3G version:2.3.2 mode:FullText source:FullText result:FullText" date="2010-03-10"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:4.0.1" date="2014-03-20"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.1.7 mode:FullText,remove_FC" date="2014-10-30"></event></eventGroup><numberingGroup><numbering type="pageFirst" number="476">476</numbering><numbering type="pageLast" number="483">483</numbering></numberingGroup><correspondenceTo><i>INRA‐CIRAD Agricultural Research Station, San Giuliano, Corsica, France</i></correspondenceTo><linkGroup><link type="toTypesetVersion" href="file:JPH.JPH878.pdf"></link></linkGroup></publicationMeta><contentMeta><unparsedEditorialHistory>Received January 28, 2004; accepted June 25, 2004</unparsedEditorialHistory><countGroup><count type="figureTotal" number="0"></count><count type="tableTotal" number="5"></count></countGroup><titleGroup><title type="main">Variability in Pathogenicity among <i>Phytophthora</i> spp. Isolated from Citrus in Corsica</title><title type="shortAuthors">V<sc>ernière</sc> et al.</title><title type="short"><i>Phytophthora</i> spp. Isolated from Citrus</title></titleGroup><creators><creator creatorRole="author" xml:id="cr1" affiliationRef="#aff-1-1"><personName><givenNames>C.</givenNames><familyName>Vernière</familyName></personName></creator> 1,3 <creator creatorRole="author" xml:id="cr2" affiliationRef="#aff-1-1"><personName><givenNames>S.</givenNames><familyName>Cohen</familyName></personName></creator> 1,2 <creator creatorRole="author" xml:id="cr3" affiliationRef="#aff-1-1"><personName><givenNames>B.</givenNames><familyName>Raffanel</familyName></personName></creator> 1 <creator creatorRole="author" xml:id="cr4" affiliationRef="#aff-1-1"><personName><givenNames>A.</givenNames><familyName>Dubois</familyName></personName></creator> 1 <creator creatorRole="author" xml:id="cr5" affiliationRef="#aff-1-1"><personName><givenNames>P.</givenNames><familyName>Venard</familyName></personName></creator> 2 <creator creatorRole="author" xml:id="cr6" affiliationRef="#aff-1-1"><personName><givenNames>F.</givenNames><familyName>Panabières</familyName></personName></creator> 2 </creators><affiliationGroup><affiliation xml:id="aff-1-1" countryCode="FR"><unparsedAffiliation>Authors’ addresses: <sup>1</sup>INRA‐CIRAD, Station de Recherches Agronomiques de San Giuliano, F‐20200, San Nicolao, Corsica, France; <sup>2</sup>INRA, Unité Interactions Plantes‐Microorganismes et Santé Végétale, F‐06606 Antibes cédex, France; <sup>3</sup>Present address: CIRAD‐FHLOR, TA50/PS4, F‐34398, Montpellier cédex 5, France (correspondence to C. Vernière. E‐mail: <email>verniere@cirad.fr</email>)</unparsedAffiliation></affiliation></affiliationGroup><keywordGroup xml:lang="en"><keyword xml:id="k1">Gummosis</keyword><keyword xml:id="k2"><i>Phytophthora</i></keyword><keyword xml:id="k3">rootstock resistance</keyword><keyword xml:id="k4">disease control</keyword></keywordGroup><abstractGroup><abstract type="main" xml:lang="en"><title type="main">Abstract</title><p>Gummosis, caused by several <i>Phytophthora</i> species, is one of the most serious constraints to citrus production in Corsica. The current <i>Phytophthora</i> population on citrus trees is mainly composed of <i>P. citrophthora</i> divided into two major groups, namely G1 and G2, with two additional minor groups. Following changes in cultural practices, favourable climatic conditions, and introduction of new hosts, repeated gummosis outbreaks have been observed. The pathogenicity of several <i>Phytophthora</i> isolates of each group collected in citrus groves was assessed for gummosis disease on 20 citrus scion and rootstock cultivars. All isolates tested proved virulent on citrus but extensive pathogenicity differences were observed among and within <i>Phytophthora</i> groups. The data indicate that G1 isolates of <i>P. citrophthora</i> are pathogenic to resistant rootstocks such as <i>Poncirus trifoliata</i> or Carrizo citrange, and moderately aggressive towards scions. In contrast, isolates of the group G2 tend to display a greater aggressiveness to a number of scion cultivars, but are not virulent to <i>P. trifoliata</i> and its hybrids. Implications of these data on disease management are discussed.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Variability in Pathogenicity among Phytophthora spp. Isolated from Citrus in Corsica</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>Phytophthora spp. Isolated from Citrus</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Variability in Pathogenicity among Phytophthora spp. Isolated from Citrus in Corsica</title></titleInfo><name type="personal"><namePart type="given">C.</namePart><namePart type="family">Vernière</namePart><affiliation>Authors’ addresses: 1INRA‐CIRAD, Station de Recherches Agronomiques de San Giuliano, F‐20200, San Nicolao, Corsica, France; 2INRA, Unité Interactions Plantes‐Microorganismes et Santé Végétale, F‐06606 Antibes cédex, France; 3Present address: CIRAD‐FHLOR, TA50/PS4, F‐34398, Montpellier cédex 5, France (correspondence to C. Vernière. E‐mail: verniere@cirad.fr)</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">S.</namePart><namePart type="family">Cohen</namePart><affiliation>Authors’ addresses: 1INRA‐CIRAD, Station de Recherches Agronomiques de San Giuliano, F‐20200, San Nicolao, Corsica, France; 2INRA, Unité Interactions Plantes‐Microorganismes et Santé Végétale, F‐06606 Antibes cédex, France; 3Present address: CIRAD‐FHLOR, TA50/PS4, F‐34398, Montpellier cédex 5, France (correspondence to C. Vernière. E‐mail: verniere@cirad.fr)</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">B.</namePart><namePart type="family">Raffanel</namePart><affiliation>Authors’ addresses: 1INRA‐CIRAD, Station de Recherches Agronomiques de San Giuliano, F‐20200, San Nicolao, Corsica, France; 2INRA, Unité Interactions Plantes‐Microorganismes et Santé Végétale, F‐06606 Antibes cédex, France; 3Present address: CIRAD‐FHLOR, TA50/PS4, F‐34398, Montpellier cédex 5, France (correspondence to C. Vernière. E‐mail: verniere@cirad.fr)</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.</namePart><namePart type="family">Dubois</namePart><affiliation>Authors’ addresses: 1INRA‐CIRAD, Station de Recherches Agronomiques de San Giuliano, F‐20200, San Nicolao, Corsica, France; 2INRA, Unité Interactions Plantes‐Microorganismes et Santé Végétale, F‐06606 Antibes cédex, France; 3Present address: CIRAD‐FHLOR, TA50/PS4, F‐34398, Montpellier cédex 5, France (correspondence to C. Vernière. E‐mail: verniere@cirad.fr)</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">P.</namePart><namePart type="family">Venard</namePart><affiliation>Authors’ addresses: 1INRA‐CIRAD, Station de Recherches Agronomiques de San Giuliano, F‐20200, San Nicolao, Corsica, France; 2INRA, Unité Interactions Plantes‐Microorganismes et Santé Végétale, F‐06606 Antibes cédex, France; 3Present address: CIRAD‐FHLOR, TA50/PS4, F‐34398, Montpellier cédex 5, France (correspondence to C. Vernière. E‐mail: verniere@cirad.fr)</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">F.</namePart><namePart type="family">Panabières</namePart><affiliation>Authors’ addresses: 1INRA‐CIRAD, Station de Recherches Agronomiques de San Giuliano, F‐20200, San Nicolao, Corsica, France; 2INRA, Unité Interactions Plantes‐Microorganismes et Santé Végétale, F‐06606 Antibes cédex, France; 3Present address: CIRAD‐FHLOR, TA50/PS4, F‐34398, Montpellier cédex 5, France (correspondence to C. Vernière. E‐mail: verniere@cirad.fr)</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Blackwell Verlag GmbH</publisher><place><placeTerm type="text">Berlin, Germany</placeTerm></place><dateIssued encoding="w3cdtf">2004-09</dateIssued><edition>Received January 28, 2004; accepted June 25, 2004</edition><copyrightDate encoding="w3cdtf">2004</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="tables">5</extent></physicalDescription><abstract lang="en">Gummosis, caused by several Phytophthora species, is one of the most serious constraints to citrus production in Corsica. The current Phytophthora population on citrus trees is mainly composed of P. citrophthora divided into two major groups, namely G1 and G2, with two additional minor groups. Following changes in cultural practices, favourable climatic conditions, and introduction of new hosts, repeated gummosis outbreaks have been observed. The pathogenicity of several Phytophthora isolates of each group collected in citrus groves was assessed for gummosis disease on 20 citrus scion and rootstock cultivars. All isolates tested proved virulent on citrus but extensive pathogenicity differences were observed among and within Phytophthora groups. The data indicate that G1 isolates of P. citrophthora are pathogenic to resistant rootstocks such as Poncirus trifoliata or Carrizo citrange, and moderately aggressive towards scions. In contrast, isolates of the group G2 tend to display a greater aggressiveness to a number of scion cultivars, but are not virulent to P. trifoliata and its hybrids. Implications of these data on disease management are discussed.</abstract><subject lang="en"><genre>keywords</genre><topic>Gummosis</topic><topic>Phytophthora</topic><topic>rootstock resistance</topic><topic>disease control</topic></subject><relatedItem type="host"><titleInfo><title>Journal of Phytopathology</title></titleInfo><genre type="journal">journal</genre><identifier type="ISSN">0931-1785</identifier><identifier type="eISSN">1439-0434</identifier><identifier type="DOI">10.1111/(ISSN)1439-0434</identifier><identifier type="PublisherID">JPH</identifier><part><date>2004</date><detail type="volume"><caption>vol.</caption><number>152</number></detail><detail type="issue"><caption>no.</caption><number>8‐9</number></detail><extent unit="pages"><start>476</start><end>483</end><total>8</total></extent></part></relatedItem><identifier type="istex">CC66AAD77E8A698711D827E5DD151338F97DB45C</identifier><identifier type="DOI">10.1111/j.1439-0434.2004.00878.x</identifier><identifier type="ArticleID">JPH878</identifier><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>Blackwell Verlag GmbH</recordOrigin></recordInfo></mods></metadata><enrichments><json:item><type>multicat</type><uri>https://api.istex.fr/document/CC66AAD77E8A698711D827E5DD151338F97DB45C/enrichments/multicat</uri></json:item></enrichments><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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