Changes in Winter Squash Fruit Exocarp Structure Associated with Age-Related Resistance to Phytophthora capsici.
Identifieur interne : 000278 ( Main/Exploration ); précédent : 000277; suivant : 000279Changes in Winter Squash Fruit Exocarp Structure Associated with Age-Related Resistance to Phytophthora capsici.
Auteurs : Safa A. Alzohairy [États-Unis] ; Raymond Hammerschmidt [États-Unis] ; Mary K. Hausbeck [États-Unis]Source :
- Phytopathology [ 0031-949X ] ; 2020.
Descripteurs français
- KwdFr :
- MESH :
- cytologie : Fruit.
- parasitologie : Cucurbita, Fruit, Maladies des plantes.
- physiologie : Phytophthora, Résistance à la maladie.
English descriptors
- KwdEn :
- MESH :
- cytology : Fruit.
- parasitology : Cucurbita, Fruit, Plant Diseases.
- physiology : Disease Resistance, Phytophthora.
Abstract
Phytophthora capsici is a destructive pathogen of cucurbits that causes root, crown, and fruit rot. Winter squash (Cucurbita spp.) production is limited by this pathogen in Michigan and other U.S. growing regions. Age-related resistance (ARR) to P. capsici occurs in C. moschata fruit but is negated by wounding. This study aimed to determine whether structural barriers to infection exist in the intact exocarp of maturing fruit exhibiting ARR. Five C. moschata cultivars were evaluated for resistance to P. capsici 10, 14, 16, 18, and 21 days postpollination (dpp). Scanning electron microscopy imaging of Chieftain butternut fruit exocarp of susceptible fruit at 7 dpp and resistant fruit at 14 and 21 dpp revealed significant increases in cuticle and epidermal thicknesses as fruit aged. P. capsici hyphae penetrated susceptible fruit at 7 dpp directly from the surface or through wounds before 6 h postinoculation (hpi) and completely degraded the fruit cell wall within 48 hpi. Resistant fruit remained unaffected at 14 and 21 dpp. The high correlation between the formation of a thickened cuticle and epidermis in maturing winter squash fruit and resistance to P. capsici indicates the presence of a structural barrier to P. capsici as the fruit matures.
DOI: 10.1094/PHYTO-04-19-0128-R
PubMed: 31454304
Affiliations:
Links toward previous steps (curation, corpus...)
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Hausbeck</name><affiliation wicri:level="2"><nlm:affiliation>Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI 48824.</nlm:affiliation><country xml:lang="fr">États-Unis</country><placeName><region type="state">Michigan</region></placeName><wicri:cityArea>Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing</wicri:cityArea></affiliation></author></analytic><series><title level="j">Phytopathology</title><idno type="ISSN">0031-949X</idno><imprint><date when="2020" type="published">2020</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Cucurbita (parasitology)</term><term>Disease Resistance (physiology)</term><term>Fruit (cytology)</term><term>Fruit (parasitology)</term><term>Phytophthora (physiology)</term><term>Plant Diseases (parasitology)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Cucurbita (parasitologie)</term><term>Fruit (cytologie)</term><term>Fruit (parasitologie)</term><term>Maladies des plantes (parasitologie)</term><term>Phytophthora (physiologie)</term><term>Résistance à la maladie (physiologie)</term></keywords><keywords scheme="MESH" qualifier="cytologie" xml:lang="fr"><term>Fruit</term></keywords><keywords scheme="MESH" qualifier="cytology" xml:lang="en"><term>Fruit</term></keywords><keywords scheme="MESH" qualifier="parasitologie" xml:lang="fr"><term>Cucurbita</term><term>Fruit</term><term>Maladies des plantes</term></keywords><keywords scheme="MESH" qualifier="parasitology" xml:lang="en"><term>Cucurbita</term><term>Fruit</term><term>Plant Diseases</term></keywords><keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Phytophthora</term><term>Résistance à la maladie</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Disease Resistance</term><term>Phytophthora</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><i>Phytophthora capsici</i> is a destructive pathogen of cucurbits that causes root, crown, and fruit rot. Winter squash (<i>Cucurbita</i> spp.) production is limited by this pathogen in Michigan and other U.S. growing regions. Age-related resistance (ARR) to <i>P. capsici</i> occurs in <i>C. moschata</i> fruit but is negated by wounding. This study aimed to determine whether structural barriers to infection exist in the intact exocarp of maturing fruit exhibiting ARR. Five <i>C. moschata</i> cultivars were evaluated for resistance to <i>P. capsici</i> 10, 14, 16, 18, and 21 days postpollination (dpp). Scanning electron microscopy imaging of Chieftain butternut fruit exocarp of susceptible fruit at 7 dpp and resistant fruit at 14 and 21 dpp revealed significant increases in cuticle and epidermal thicknesses as fruit aged. <i>P. capsici</i> hyphae penetrated susceptible fruit at 7 dpp directly from the surface or through wounds before 6 h postinoculation (hpi) and completely degraded the fruit cell wall within 48 hpi. Resistant fruit remained unaffected at 14 and 21 dpp. The high correlation between the formation of a thickened cuticle and epidermis in maturing winter squash fruit and resistance to <i>P. capsici</i> indicates the presence of a structural barrier to <i>P. capsici</i> as the fruit matures.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" IndexingMethod="Curated" Owner="NLM"><PMID Version="1">31454304</PMID><DateCompleted><Year>2020</Year><Month>02</Month><Day>13</Day></DateCompleted><DateRevised><Year>2020</Year><Month>02</Month><Day>13</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Print">0031-949X</ISSN><JournalIssue CitedMedium="Print"><Volume>110</Volume><Issue>2</Issue><PubDate><Year>2020</Year><Month>Feb</Month></PubDate></JournalIssue><Title>Phytopathology</Title><ISOAbbreviation>Phytopathology</ISOAbbreviation></Journal><ArticleTitle>Changes in Winter Squash Fruit Exocarp Structure Associated with Age-Related Resistance to <i>Phytophthora capsici</i>.</ArticleTitle><Pagination><MedlinePgn>447-455</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1094/PHYTO-04-19-0128-R</ELocationID><Abstract><AbstractText><i>Phytophthora capsici</i> is a destructive pathogen of cucurbits that causes root, crown, and fruit rot. Winter squash (<i>Cucurbita</i> spp.) production is limited by this pathogen in Michigan and other U.S. growing regions. Age-related resistance (ARR) to <i>P. capsici</i> occurs in <i>C. moschata</i> fruit but is negated by wounding. This study aimed to determine whether structural barriers to infection exist in the intact exocarp of maturing fruit exhibiting ARR. Five <i>C. moschata</i> cultivars were evaluated for resistance to <i>P. capsici</i> 10, 14, 16, 18, and 21 days postpollination (dpp). Scanning electron microscopy imaging of Chieftain butternut fruit exocarp of susceptible fruit at 7 dpp and resistant fruit at 14 and 21 dpp revealed significant increases in cuticle and epidermal thicknesses as fruit aged. <i>P. capsici</i> hyphae penetrated susceptible fruit at 7 dpp directly from the surface or through wounds before 6 h postinoculation (hpi) and completely degraded the fruit cell wall within 48 hpi. Resistant fruit remained unaffected at 14 and 21 dpp. The high correlation between the formation of a thickened cuticle and epidermis in maturing winter squash fruit and resistance to <i>P. capsici</i> indicates the presence of a structural barrier to <i>P. capsici</i> as the fruit matures.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Alzohairy</LastName><ForeName>Safa A</ForeName><Initials>SA</Initials><AffiliationInfo><Affiliation>Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI 48824.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Hammerschmidt</LastName><ForeName>Raymond</ForeName><Initials>R</Initials><AffiliationInfo><Affiliation>Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI 48824.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Hausbeck</LastName><ForeName>Mary K</ForeName><Initials>MK</Initials><Identifier Source="ORCID">http://orcid.org/0000-0002-6826-7911</Identifier><AffiliationInfo><Affiliation>Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI 48824.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2019</Year><Month>12</Month><Day>30</Day></ArticleDate></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>Phytopathology</MedlineTA><NlmUniqueID>9427222</NlmUniqueID><ISSNLinking>0031-949X</ISSNLinking></MedlineJournalInfo><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D028464" MajorTopicYN="Y">Cucurbita</DescriptorName><QualifierName UI="Q000469" MajorTopicYN="N">parasitology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D060467" MajorTopicYN="Y">Disease Resistance</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D005638" MajorTopicYN="Y">Fruit</DescriptorName><QualifierName UI="Q000166" MajorTopicYN="N">cytology</QualifierName><QualifierName UI="Q000469" MajorTopicYN="N">parasitology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D010838" MajorTopicYN="Y">Phytophthora</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D010935" MajorTopicYN="N">Plant Diseases</DescriptorName><QualifierName UI="Q000469" MajorTopicYN="N">parasitology</QualifierName></MeshHeading></MeshHeadingList><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">genetics and resistance</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="pubmed"><Year>2019</Year><Month>8</Month><Day>28</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2020</Year><Month>2</Month><Day>14</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2019</Year><Month>8</Month><Day>28</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">31454304</ArticleId><ArticleId IdType="doi">10.1094/PHYTO-04-19-0128-R</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>États-Unis</li></country><region><li>Michigan</li></region></list><tree><country name="États-Unis"><region name="Michigan"><name sortKey="Alzohairy, Safa A" sort="Alzohairy, Safa A" uniqKey="Alzohairy S" first="Safa A" last="Alzohairy">Safa A. Alzohairy</name></region><name sortKey="Hammerschmidt, Raymond" sort="Hammerschmidt, Raymond" uniqKey="Hammerschmidt R" first="Raymond" last="Hammerschmidt">Raymond Hammerschmidt</name><name sortKey="Hausbeck, Mary K" sort="Hausbeck, Mary K" uniqKey="Hausbeck M" first="Mary K" last="Hausbeck">Mary K. Hausbeck</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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