Effects of Set-Point Substrate Moisture Control on Oomycete Disease Risk in Containerized Annual Crops Based on the Tomato-Phytophthora capsici Pathosystem.
Identifieur interne : 000524 ( Main/Exploration ); précédent : 000523; suivant : 000525Effects of Set-Point Substrate Moisture Control on Oomycete Disease Risk in Containerized Annual Crops Based on the Tomato-Phytophthora capsici Pathosystem.
Auteurs : Johanna Del Castillo Múnera [États-Unis] ; Bruk Belayneh [États-Unis] ; John Lea-Cox [États-Unis] ; Cassandra L. Swett [États-Unis]Source :
- Phytopathology [ 0031-949X ] ; 2019.
Descripteurs français
- KwdFr :
- MESH :
- microbiologie : Lycopersicon esculentum, Maladies des plantes.
- physiologie : Phytophthora.
- Eau, Produits agricoles.
English descriptors
- KwdEn :
- MESH :
- chemical : Water.
- microbiology : Lycopersicon esculentum, Plant Diseases.
- physiology : Phytophthora.
- Crops, Agricultural.
Abstract
In containerized (potted) annual nursery and greenhouse crops, set point-controlled irrigation allows adaptation to increasing water insecurity by precisely reducing water inputs. A key factor influencing adoption is lack of information on disease risk. To facilitate adaptive water use, effects of set-point substrate moisture (SM) control on disease risk and water savings in containerized annual production were evaluated using the Phytophthora capsici-tomato pathosystem (a model system for water stress predisposition to pathogen infection), comparing outcomes of imposing midrange SM (15% volumetric water content [VWC]) and low-range SM (10% VWC) with well-watered (20% VWC) plants. Reducing soil moisture to 10% VWC differentially reduced stem water potential (P < 0.05) and enhanced rate of wilt progress (P = 0.006) and root rot severity (P = 0.03) in P. capsici inoculated plants compared with noninoculated plants. Furthermore, incidence of fine root infections in inoculated asymptomatic plants was greater under reduced SM (10% VWC) compared with in well-watered plants (P < 0.05). Mild reductions to 15% VWC did not influence plant performance (root and shoot weights and plant height) or pathogen infection in either inoculated or noninoculated plants compared with well-watered plants and reduced water inputs by 17%, indicating potential for reducing water usage without increasing disease risk. Furthermore, P. capsici inoculated plants had lower shoot biomass and greater root infection incidence when 15% VWC was applied to older compared with younger plants; the inverse was true for root rot severity, although root rot development was minor overall (P < 0.05). These results indicate that water use reductions pose disease risks, but there is potential to reduce water use and effectively manage plant pathogens in containerized production. Overall, this study indicates that physiological indices should not be solely relied on to develop water reduction methods.
DOI: 10.1094/PHYTO-03-18-0096-R
PubMed: 30973309
Affiliations:
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Swett</name><affiliation wicri:level="2"><nlm:affiliation>1Department of Plant Pathology, University of California, Davis, CA 95616.</nlm:affiliation><country xml:lang="fr">États-Unis</country><placeName><region type="state">Californie</region></placeName><wicri:cityArea>1Department of Plant Pathology, University of California, Davis</wicri:cityArea></affiliation></author></analytic><series><title level="j">Phytopathology</title><idno type="ISSN">0031-949X</idno><imprint><date when="2019" type="published">2019</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Crops, Agricultural (MeSH)</term><term>Lycopersicon esculentum (microbiology)</term><term>Phytophthora (physiology)</term><term>Plant Diseases (microbiology)</term><term>Water (MeSH)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Eau (MeSH)</term><term>Lycopersicon esculentum (microbiologie)</term><term>Maladies des plantes (microbiologie)</term><term>Phytophthora (physiologie)</term><term>Produits agricoles (MeSH)</term></keywords><keywords scheme="MESH" type="chemical" xml:lang="en"><term>Water</term></keywords><keywords scheme="MESH" qualifier="microbiologie" xml:lang="fr"><term>Lycopersicon esculentum</term><term>Maladies des plantes</term></keywords><keywords scheme="MESH" qualifier="microbiology" xml:lang="en"><term>Lycopersicon esculentum</term><term>Plant Diseases</term></keywords><keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Phytophthora</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Phytophthora</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Crops, Agricultural</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Eau</term><term>Produits agricoles</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">In containerized (potted) annual nursery and greenhouse crops, set point-controlled irrigation allows adaptation to increasing water insecurity by precisely reducing water inputs. A key factor influencing adoption is lack of information on disease risk. To facilitate adaptive water use, effects of set-point substrate moisture (SM) control on disease risk and water savings in containerized annual production were evaluated using the <i>Phytophthora capsici</i>-tomato pathosystem (a model system for water stress predisposition to pathogen infection), comparing outcomes of imposing midrange SM (15% volumetric water content [VWC]) and low-range SM (10% VWC) with well-watered (20% VWC) plants. Reducing soil moisture to 10% VWC differentially reduced stem water potential (<i>P</i> < 0.05) and enhanced rate of wilt progress (<i>P</i> = 0.006) and root rot severity (<i>P</i> = 0.03) in <i>P. capsici</i> inoculated plants compared with noninoculated plants. Furthermore, incidence of fine root infections in inoculated asymptomatic plants was greater under reduced SM (10% VWC) compared with in well-watered plants (<i>P</i> < 0.05). Mild reductions to 15% VWC did not influence plant performance (root and shoot weights and plant height) or pathogen infection in either inoculated or noninoculated plants compared with well-watered plants and reduced water inputs by 17%, indicating potential for reducing water usage without increasing disease risk. Furthermore, <i>P. capsici</i> inoculated plants had lower shoot biomass and greater root infection incidence when 15% VWC was applied to older compared with younger plants; the inverse was true for root rot severity, although root rot development was minor overall (<i>P</i> < 0.05). These results indicate that water use reductions pose disease risks, but there is potential to reduce water use and effectively manage plant pathogens in containerized production. Overall, this study indicates that physiological indices should not be solely relied on to develop water reduction methods.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" IndexingMethod="Curated" Owner="NLM"><PMID Version="1">30973309</PMID><DateCompleted><Year>2019</Year><Month>09</Month><Day>10</Day></DateCompleted><DateRevised><Year>2019</Year><Month>09</Month><Day>10</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Print">0031-949X</ISSN><JournalIssue CitedMedium="Print"><Volume>109</Volume><Issue>8</Issue><PubDate><Year>2019</Year><Month>Aug</Month></PubDate></JournalIssue><Title>Phytopathology</Title><ISOAbbreviation>Phytopathology</ISOAbbreviation></Journal><ArticleTitle>Effects of Set-Point Substrate Moisture Control on Oomycete Disease Risk in Containerized Annual Crops Based on the Tomato-<i>Phytophthora capsici</i> Pathosystem.</ArticleTitle><Pagination><MedlinePgn>1441-1452</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1094/PHYTO-03-18-0096-R</ELocationID><Abstract><AbstractText>In containerized (potted) annual nursery and greenhouse crops, set point-controlled irrigation allows adaptation to increasing water insecurity by precisely reducing water inputs. A key factor influencing adoption is lack of information on disease risk. To facilitate adaptive water use, effects of set-point substrate moisture (SM) control on disease risk and water savings in containerized annual production were evaluated using the <i>Phytophthora capsici</i>-tomato pathosystem (a model system for water stress predisposition to pathogen infection), comparing outcomes of imposing midrange SM (15% volumetric water content [VWC]) and low-range SM (10% VWC) with well-watered (20% VWC) plants. Reducing soil moisture to 10% VWC differentially reduced stem water potential (<i>P</i> < 0.05) and enhanced rate of wilt progress (<i>P</i> = 0.006) and root rot severity (<i>P</i> = 0.03) in <i>P. capsici</i> inoculated plants compared with noninoculated plants. Furthermore, incidence of fine root infections in inoculated asymptomatic plants was greater under reduced SM (10% VWC) compared with in well-watered plants (<i>P</i> < 0.05). Mild reductions to 15% VWC did not influence plant performance (root and shoot weights and plant height) or pathogen infection in either inoculated or noninoculated plants compared with well-watered plants and reduced water inputs by 17%, indicating potential for reducing water usage without increasing disease risk. Furthermore, <i>P. capsici</i> inoculated plants had lower shoot biomass and greater root infection incidence when 15% VWC was applied to older compared with younger plants; the inverse was true for root rot severity, although root rot development was minor overall (<i>P</i> < 0.05). These results indicate that water use reductions pose disease risks, but there is potential to reduce water use and effectively manage plant pathogens in containerized production. Overall, this study indicates that physiological indices should not be solely relied on to develop water reduction methods.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Del Castillo Múnera</LastName><ForeName>Johanna</ForeName><Initials>J</Initials><Identifier Source="ORCID">http://orcid.org/0000-0002-8054-407X</Identifier><AffiliationInfo><Affiliation>1Department of Plant Pathology, University of California, Davis, CA 95616.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Belayneh</LastName><ForeName>Bruk</ForeName><Initials>B</Initials><AffiliationInfo><Affiliation>2Department of Plant Sciences and Landscape Architecture, University of Maryland, College Park, MD 20742.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Lea-Cox</LastName><ForeName>John</ForeName><Initials>J</Initials><AffiliationInfo><Affiliation>2Department of Plant Sciences and Landscape Architecture, University of Maryland, College Park, MD 20742.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Swett</LastName><ForeName>Cassandra L</ForeName><Initials>CL</Initials><AffiliationInfo><Affiliation>1Department of Plant Pathology, University of California, Davis, CA 95616.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2019</Year><Month>07</Month><Day>05</Day></ArticleDate></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>Phytopathology</MedlineTA><NlmUniqueID>9427222</NlmUniqueID><ISSNLinking>0031-949X</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>059QF0KO0R</RegistryNumber><NameOfSubstance UI="D014867">Water</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D018556" MajorTopicYN="N">Crops, Agricultural</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D018551" MajorTopicYN="Y">Lycopersicon esculentum</DescriptorName><QualifierName UI="Q000382" MajorTopicYN="N">microbiology</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="Q000382" MajorTopicYN="Y">microbiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D014867" MajorTopicYN="N">Water</DescriptorName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="pubmed"><Year>2019</Year><Month>4</Month><Day>12</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2019</Year><Month>9</Month><Day>11</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2019</Year><Month>4</Month><Day>12</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">30973309</ArticleId><ArticleId IdType="doi">10.1094/PHYTO-03-18-0096-R</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>États-Unis</li></country><region><li>Californie</li><li>Maryland</li></region></list><tree><country name="États-Unis"><region name="Californie"><name sortKey="Del Castillo Munera, Johanna" sort="Del Castillo Munera, Johanna" uniqKey="Del Castillo Munera J" first="Johanna" last="Del Castillo Múnera">Johanna Del Castillo Múnera</name></region><name sortKey="Belayneh, Bruk" sort="Belayneh, Bruk" uniqKey="Belayneh B" first="Bruk" last="Belayneh">Bruk Belayneh</name><name sortKey="Lea Cox, John" sort="Lea Cox, John" uniqKey="Lea Cox J" first="John" last="Lea-Cox">John Lea-Cox</name><name sortKey="Swett, Cassandra L" sort="Swett, Cassandra L" uniqKey="Swett C" first="Cassandra L" last="Swett">Cassandra L. 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