Root Rot of Juniperus and Microbiota by Phytophthora lateralis in Oregon Horticultural Nurseries.
Identifieur interne : 000070 ( Main/Exploration ); précédent : 000069; suivant : 000071Root Rot of Juniperus and Microbiota by Phytophthora lateralis in Oregon Horticultural Nurseries.
Auteurs : Ebba K. Peterson [États-Unis] ; Franziska Rupp [États-Unis] ; Joyce Eberhart [États-Unis] ; Jennifer L. Parke [États-Unis]Source :
- Plant disease [ 0191-2917 ] ; 2020.
Descripteurs français
- KwdFr :
- MESH :
English descriptors
- KwdEn :
- MESH :
- geographic : Oregon.
- Humans, Infant, Juniperus, Microbiota, Nurseries, Infant, Phytophthora, Plant Diseases.
Abstract
Widespread symptoms of root rot and mortality on Juniperus communis and Microbiota decussata were observed in two horticultural nurseries in Oregon, leading to the isolation of a Phytophthora sp. from diseased roots. Based on morphology and sequencing the internal transcribed spacer ITS1-5.8S-ITS2 region, isolates were identified as the invasive pathogen Phytophthora lateralis, causal agent of Port-Orford-cedar (POC; Chamaecyparis lawsoniana) root disease. Additional sequencing of the cytochrome c oxidase subunit 1 and 2 genes identified all isolates as belonging to the PNW lineage. Utilizing recovered isolates plus a POC-wildlands isolate and susceptible POC as controls, we completed Koch's postulates on potted Juniperus and Microbiota plants. Nursery isolates were more aggressive than the forest isolate, which was used in the POC resistance breeding program. Increased aggressiveness was confirmed using a branch stem dip assay with four POC clones that differed in resistance, although no isolate completely overcame major-gene resistance. Isolates were sensitive to mefenoxam, a fungicide commonly used to suppress Phytophthora spp. growth in commercial nurseries. Although POC resistance is durable against these more aggressive nursery isolates, the expanded host range of P. lateralis challenges POC conservation through the continued movement of P. lateralis by the nursery industry.
DOI: 10.1094/PDIS-04-19-0808-RE
PubMed: 32105574
Affiliations:
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Le document en format XML
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Peterson</name><affiliation wicri:level="2"><nlm:affiliation>Department of Botany and Plant Pathology, 2082 Cordley Hall, Oregon State University, Corvallis, OR 97331.</nlm:affiliation><country xml:lang="fr">États-Unis</country><placeName><region type="state">Oregon</region></placeName><wicri:cityArea>Department of Botany and Plant Pathology, 2082 Cordley Hall, Oregon State University, Corvallis</wicri:cityArea></affiliation></author><author><name sortKey="Rupp, Franziska" sort="Rupp, Franziska" uniqKey="Rupp F" first="Franziska" last="Rupp">Franziska Rupp</name><affiliation wicri:level="2"><nlm:affiliation>Department of Crop and Soil Science, 3017 Agriculture and Life Sciences Building, Oregon State University, Corvallis, OR 97331.</nlm:affiliation><country xml:lang="fr">États-Unis</country><placeName><region type="state">Oregon</region></placeName><wicri:cityArea>Department of Crop and Soil Science, 3017 Agriculture and Life Sciences Building, Oregon State University, Corvallis</wicri:cityArea></affiliation></author><author><name sortKey="Eberhart, Joyce" sort="Eberhart, Joyce" uniqKey="Eberhart J" first="Joyce" last="Eberhart">Joyce Eberhart</name><affiliation wicri:level="2"><nlm:affiliation>Department of Crop and Soil Science, 3017 Agriculture and Life Sciences Building, Oregon State University, Corvallis, OR 97331.</nlm:affiliation><country xml:lang="fr">États-Unis</country><placeName><region type="state">Oregon</region></placeName><wicri:cityArea>Department of Crop and Soil Science, 3017 Agriculture and Life Sciences Building, Oregon State University, Corvallis</wicri:cityArea></affiliation></author><author><name sortKey="Parke, Jennifer L" sort="Parke, Jennifer L" uniqKey="Parke J" first="Jennifer L" last="Parke">Jennifer L. Parke</name><affiliation wicri:level="2"><nlm:affiliation>Department of Botany and Plant Pathology, 2082 Cordley Hall, Oregon State University, Corvallis, OR 97331.</nlm:affiliation><country xml:lang="fr">États-Unis</country><placeName><region type="state">Oregon</region></placeName><wicri:cityArea>Department of Botany and Plant Pathology, 2082 Cordley Hall, Oregon State University, Corvallis</wicri:cityArea></affiliation><affiliation wicri:level="2"><nlm:affiliation>Department of Crop and Soil Science, 3017 Agriculture and Life Sciences Building, Oregon State University, Corvallis, OR 97331.</nlm:affiliation><country xml:lang="fr">États-Unis</country><placeName><region type="state">Oregon</region></placeName><wicri:cityArea>Department of Crop and Soil Science, 3017 Agriculture and Life Sciences Building, Oregon State University, Corvallis</wicri:cityArea></affiliation></author></analytic><series><title level="j">Plant disease</title><idno type="ISSN">0191-2917</idno><imprint><date when="2020" type="published">2020</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Humans (MeSH)</term><term>Infant (MeSH)</term><term>Juniperus (MeSH)</term><term>Microbiota (MeSH)</term><term>Nurseries, Infant (MeSH)</term><term>Oregon (MeSH)</term><term>Phytophthora (MeSH)</term><term>Plant Diseases (MeSH)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Humains (MeSH)</term><term>Juniperus (MeSH)</term><term>Maladies des plantes (MeSH)</term><term>Microbiote (MeSH)</term><term>Nourrisson (MeSH)</term><term>Orégon (MeSH)</term><term>Phytophthora (MeSH)</term></keywords><keywords scheme="MESH" type="geographic" xml:lang="en"><term>Oregon</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Humans</term><term>Infant</term><term>Juniperus</term><term>Microbiota</term><term>Nurseries, Infant</term><term>Phytophthora</term><term>Plant Diseases</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Humains</term><term>Juniperus</term><term>Maladies des plantes</term><term>Microbiote</term><term>Nourrisson</term><term>Orégon</term><term>Phytophthora</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Widespread symptoms of root rot and mortality on <i>Juniperus communis</i> and <i>Microbiota decussata</i> were observed in two horticultural nurseries in Oregon, leading to the isolation of a <i>Phytophthora</i> sp. from diseased roots. Based on morphology and sequencing the internal transcribed spacer ITS1-5.8S-ITS2 region, isolates were identified as the invasive pathogen <i>Phytophthora lateralis</i>, causal agent of Port-Orford-cedar (POC; <i>Chamaecyparis lawsoniana</i>) root disease. Additional sequencing of the cytochrome c oxidase subunit 1 and 2 genes identified all isolates as belonging to the PNW lineage. Utilizing recovered isolates plus a POC-wildlands isolate and susceptible POC as controls, we completed Koch's postulates on potted <i>Juniperus</i> and <i>Microbiota</i> plants. Nursery isolates were more aggressive than the forest isolate, which was used in the POC resistance breeding program. Increased aggressiveness was confirmed using a branch stem dip assay with four POC clones that differed in resistance, although no isolate completely overcame major-gene resistance. Isolates were sensitive to mefenoxam, a fungicide commonly used to suppress <i>Phytophthora</i> spp. growth in commercial nurseries. Although POC resistance is durable against these more aggressive nursery isolates, the expanded host range of <i>P. lateralis</i> challenges POC conservation through the continued movement of <i>P. lateralis</i> by the nursery industry.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" IndexingMethod="Automated" Owner="NLM"><PMID Version="1">32105574</PMID><DateCompleted><Year>2020</Year><Month>05</Month><Day>05</Day></DateCompleted><DateRevised><Year>2020</Year><Month>05</Month><Day>05</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Print">0191-2917</ISSN><JournalIssue CitedMedium="Print"><Volume>104</Volume><Issue>5</Issue><PubDate><Year>2020</Year><Month>May</Month></PubDate></JournalIssue><Title>Plant disease</Title><ISOAbbreviation>Plant Dis</ISOAbbreviation></Journal><ArticleTitle>Root Rot of <i>Juniperus</i> and <i>Microbiota</i> by <i>Phytophthora lateralis</i> in Oregon Horticultural Nurseries.</ArticleTitle><Pagination><MedlinePgn>1500-1506</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1094/PDIS-04-19-0808-RE</ELocationID><Abstract><AbstractText>Widespread symptoms of root rot and mortality on <i>Juniperus communis</i> and <i>Microbiota decussata</i> were observed in two horticultural nurseries in Oregon, leading to the isolation of a <i>Phytophthora</i> sp. from diseased roots. Based on morphology and sequencing the internal transcribed spacer ITS1-5.8S-ITS2 region, isolates were identified as the invasive pathogen <i>Phytophthora lateralis</i>, causal agent of Port-Orford-cedar (POC; <i>Chamaecyparis lawsoniana</i>) root disease. Additional sequencing of the cytochrome c oxidase subunit 1 and 2 genes identified all isolates as belonging to the PNW lineage. Utilizing recovered isolates plus a POC-wildlands isolate and susceptible POC as controls, we completed Koch's postulates on potted <i>Juniperus</i> and <i>Microbiota</i> plants. Nursery isolates were more aggressive than the forest isolate, which was used in the POC resistance breeding program. Increased aggressiveness was confirmed using a branch stem dip assay with four POC clones that differed in resistance, although no isolate completely overcame major-gene resistance. Isolates were sensitive to mefenoxam, a fungicide commonly used to suppress <i>Phytophthora</i> spp. growth in commercial nurseries. Although POC resistance is durable against these more aggressive nursery isolates, the expanded host range of <i>P. lateralis</i> challenges POC conservation through the continued movement of <i>P. lateralis</i> by the nursery industry.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Peterson</LastName><ForeName>Ebba K</ForeName><Initials>EK</Initials><Identifier Source="ORCID">http://orcid.org/0000-0002-9743-6964</Identifier><AffiliationInfo><Affiliation>Department of Botany and Plant Pathology, 2082 Cordley Hall, Oregon State University, Corvallis, OR 97331.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Rupp</LastName><ForeName>Franziska</ForeName><Initials>F</Initials><AffiliationInfo><Affiliation>Department of Crop and Soil Science, 3017 Agriculture and Life Sciences Building, Oregon State University, Corvallis, OR 97331.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Eberhart</LastName><ForeName>Joyce</ForeName><Initials>J</Initials><AffiliationInfo><Affiliation>Department of Crop and Soil Science, 3017 Agriculture and Life Sciences Building, Oregon State University, Corvallis, OR 97331.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Parke</LastName><ForeName>Jennifer L</ForeName><Initials>JL</Initials><AffiliationInfo><Affiliation>Department of Botany and Plant Pathology, 2082 Cordley Hall, Oregon State University, Corvallis, OR 97331.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>Department of Crop and Soil Science, 3017 Agriculture and Life Sciences Building, Oregon State University, Corvallis, OR 97331.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2020</Year><Month>02</Month><Day>26</Day></ArticleDate></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>Plant Dis</MedlineTA><NlmUniqueID>9882809</NlmUniqueID><ISSNLinking>0191-2917</ISSNLinking></MedlineJournalInfo><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D006801" MajorTopicYN="N">Humans</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D007223" MajorTopicYN="N">Infant</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D018653" MajorTopicYN="Y">Juniperus</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D064307" MajorTopicYN="Y">Microbiota</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D009724" MajorTopicYN="Y">Nurseries, Infant</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D009922" MajorTopicYN="N" Type="Geographic">Oregon</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D010838" MajorTopicYN="Y">Phytophthora</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D010935" MajorTopicYN="N">Plant Diseases</DescriptorName></MeshHeading></MeshHeadingList><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">Phytophthora root rot</Keyword><Keyword MajorTopicYN="N">Russian cypress</Keyword><Keyword MajorTopicYN="N">Siberian cypress</Keyword><Keyword MajorTopicYN="N">conifer diseases</Keyword><Keyword MajorTopicYN="N">juniper</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="pubmed"><Year>2020</Year><Month>2</Month><Day>28</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2020</Year><Month>5</Month><Day>6</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2020</Year><Month>2</Month><Day>28</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">32105574</ArticleId><ArticleId IdType="doi">10.1094/PDIS-04-19-0808-RE</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>États-Unis</li></country><region><li>Oregon</li></region></list><tree><country name="États-Unis"><region name="Oregon"><name sortKey="Peterson, Ebba K" sort="Peterson, Ebba K" uniqKey="Peterson E" first="Ebba K" last="Peterson">Ebba K. Peterson</name></region><name sortKey="Eberhart, Joyce" sort="Eberhart, Joyce" uniqKey="Eberhart J" first="Joyce" last="Eberhart">Joyce Eberhart</name><name sortKey="Parke, Jennifer L" sort="Parke, Jennifer L" uniqKey="Parke J" first="Jennifer L" last="Parke">Jennifer L. Parke</name><name sortKey="Parke, Jennifer L" sort="Parke, Jennifer L" uniqKey="Parke J" first="Jennifer L" last="Parke">Jennifer L. Parke</name><name sortKey="Rupp, Franziska" sort="Rupp, Franziska" uniqKey="Rupp F" first="Franziska" last="Rupp">Franziska Rupp</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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