Intraspecific functional diversity in hosts and its effect on disease risk across a climatic gradient.
Identifieur interne : 001A81 ( Main/Exploration ); précédent : 001A80; suivant : 001A82Intraspecific functional diversity in hosts and its effect on disease risk across a climatic gradient.
Auteurs : K A Garrett [États-Unis] ; L N Zú Iga ; E. Roncal ; G A Forbes ; C C Mundt ; Z. Su ; R J NelsonSource :
- Ecological applications : a publication of the Ecological Society of America [ 1051-0761 ] ; 2009.
Descripteurs français
- KwdFr :
- MESH :
- microbiologie : Maladies des plantes, Solanum tuberosum.
- physiologie : Phytophthora infestans.
- Climat, Facteurs de risque, Facteurs temps, Interactions hôte-pathogène, Modèles biologiques, Pérou, Équateur, États-Unis.
- Wicri :
- geographic : Équateur, Pérou, États-Unis.
English descriptors
- KwdEn :
- MESH :
- geographic : Ecuador, Peru, United States.
- microbiology : Plant Diseases, Solanum tuberosum.
- physiology : Phytophthora infestans.
- Climate, Host-Pathogen Interactions, Models, Biological, Risk Factors, Time Factors.
Abstract
The effects of host biodiversity on disease risk may vary greatly depending on host population structure and climatic conditions. Agricultural diseases such as potato late blight, caused by Phytophthora infestans, provide the opportunity to study the effects of intraspecific host diversity that is relatively well-defined in terms of disease resistance phenotypes and may have functional impacts on disease levels. When these systems are present across a climatic gradient, it is also possible to study how season length and conduciveness of the environment to disease may influence the effects of host diversity on disease risk. We developed a simple model of epidemic progress to evaluate the effects on disease risk of season length, environmental disease conduciveness, and host functional divergence for mixtures of a susceptible host and a host with some resistance. Differences in disease levels for the susceptible vs. resistant genotypes shifted over time, with the divergence in disease levels first increasing and then decreasing. Disease reductions from host diversity were greatest for high host divergence and combinations of environmental disease conduciveness and season length that led to moderate disease severity. We also compared the effects of host functional divergence on potato late-blight risk in Ecuador (long seasons), two sites in Peru (intermediate seasons) in El Niño and La Niña years, and the United States (short seasons). There was some evidence for greater disease risk reduction from host diversity where seasons were shorter, probably because of lower regional inoculum loads. There was strong evidence for greater disease reduction when host functional divergence was greater. These results indicate that consideration of season length, environmental conduciveness to disease, and host functional divergence can help to explain the variability in disease response to host diversity.
DOI: 10.1890/08-0942.1
PubMed: 19831076
Affiliations:
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Roncal</name></author><author><name sortKey="Forbes, G A" sort="Forbes, G A" uniqKey="Forbes G" first="G A" last="Forbes">G A Forbes</name></author><author><name sortKey="Mundt, C C" sort="Mundt, C C" uniqKey="Mundt C" first="C C" last="Mundt">C C Mundt</name></author><author><name sortKey="Su, Z" sort="Su, Z" uniqKey="Su Z" first="Z" last="Su">Z. Su</name></author><author><name sortKey="Nelson, R J" sort="Nelson, R J" uniqKey="Nelson R" first="R J" last="Nelson">R J Nelson</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2009">2009</date><idno type="RBID">pubmed:19831076</idno><idno type="pmid">19831076</idno><idno type="doi">10.1890/08-0942.1</idno><idno type="wicri:Area/Main/Corpus">001A07</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">001A07</idno><idno type="wicri:Area/Main/Curation">001A07</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Curation">001A07</idno><idno type="wicri:Area/Main/Exploration">001A07</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Intraspecific functional diversity in hosts and its effect on disease risk across a climatic gradient.</title><author><name sortKey="Garrett, K A" sort="Garrett, K A" uniqKey="Garrett K" first="K A" last="Garrett">K A Garrett</name><affiliation wicri:level="1"><nlm:affiliation>Department of Plant Pathology, 4024 Throckmorton Plant Sciences Center, Kansas State University, Manhattan, Kansas 66506, USA. kgarrett@ksu.edu</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Plant Pathology, 4024 Throckmorton Plant Sciences Center, Kansas State University, Manhattan, Kansas 66506</wicri:regionArea><wicri:noRegion>Kansas 66506</wicri:noRegion></affiliation></author><author><name sortKey="Zu Iga, L N" sort="Zu Iga, L N" uniqKey="Zu Iga L" first="L N" last="Zú Iga">L N Zú Iga</name></author><author><name sortKey="Roncal, E" sort="Roncal, E" uniqKey="Roncal E" first="E" last="Roncal">E. Roncal</name></author><author><name sortKey="Forbes, G A" sort="Forbes, G A" uniqKey="Forbes G" first="G A" last="Forbes">G A Forbes</name></author><author><name sortKey="Mundt, C C" sort="Mundt, C C" uniqKey="Mundt C" first="C C" last="Mundt">C C Mundt</name></author><author><name sortKey="Su, Z" sort="Su, Z" uniqKey="Su Z" first="Z" last="Su">Z. Su</name></author><author><name sortKey="Nelson, R J" sort="Nelson, R J" uniqKey="Nelson R" first="R J" last="Nelson">R J Nelson</name></author></analytic><series><title level="j">Ecological applications : a publication of the Ecological Society of America</title><idno type="ISSN">1051-0761</idno><imprint><date when="2009" type="published">2009</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Climate (MeSH)</term><term>Ecuador (MeSH)</term><term>Host-Pathogen Interactions (MeSH)</term><term>Models, Biological (MeSH)</term><term>Peru (MeSH)</term><term>Phytophthora infestans (physiology)</term><term>Plant Diseases (microbiology)</term><term>Risk Factors (MeSH)</term><term>Solanum tuberosum (microbiology)</term><term>Time Factors (MeSH)</term><term>United States (MeSH)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Climat (MeSH)</term><term>Facteurs de risque (MeSH)</term><term>Facteurs temps (MeSH)</term><term>Interactions hôte-pathogène (MeSH)</term><term>Maladies des plantes (microbiologie)</term><term>Modèles biologiques (MeSH)</term><term>Phytophthora infestans (physiologie)</term><term>Pérou (MeSH)</term><term>Solanum tuberosum (microbiologie)</term><term>Équateur (MeSH)</term><term>États-Unis (MeSH)</term></keywords><keywords scheme="MESH" type="geographic" xml:lang="en"><term>Ecuador</term><term>Peru</term><term>United States</term></keywords><keywords scheme="MESH" qualifier="microbiologie" xml:lang="fr"><term>Maladies des plantes</term><term>Solanum tuberosum</term></keywords><keywords scheme="MESH" qualifier="microbiology" xml:lang="en"><term>Plant Diseases</term><term>Solanum tuberosum</term></keywords><keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Phytophthora infestans</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Phytophthora infestans</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Climate</term><term>Host-Pathogen Interactions</term><term>Models, Biological</term><term>Risk Factors</term><term>Time Factors</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Climat</term><term>Facteurs de risque</term><term>Facteurs temps</term><term>Interactions hôte-pathogène</term><term>Modèles biologiques</term><term>Pérou</term><term>Équateur</term><term>États-Unis</term></keywords><keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Équateur</term><term>Pérou</term><term>États-Unis</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The effects of host biodiversity on disease risk may vary greatly depending on host population structure and climatic conditions. Agricultural diseases such as potato late blight, caused by Phytophthora infestans, provide the opportunity to study the effects of intraspecific host diversity that is relatively well-defined in terms of disease resistance phenotypes and may have functional impacts on disease levels. When these systems are present across a climatic gradient, it is also possible to study how season length and conduciveness of the environment to disease may influence the effects of host diversity on disease risk. We developed a simple model of epidemic progress to evaluate the effects on disease risk of season length, environmental disease conduciveness, and host functional divergence for mixtures of a susceptible host and a host with some resistance. Differences in disease levels for the susceptible vs. resistant genotypes shifted over time, with the divergence in disease levels first increasing and then decreasing. Disease reductions from host diversity were greatest for high host divergence and combinations of environmental disease conduciveness and season length that led to moderate disease severity. We also compared the effects of host functional divergence on potato late-blight risk in Ecuador (long seasons), two sites in Peru (intermediate seasons) in El Niño and La Niña years, and the United States (short seasons). There was some evidence for greater disease risk reduction from host diversity where seasons were shorter, probably because of lower regional inoculum loads. There was strong evidence for greater disease reduction when host functional divergence was greater. These results indicate that consideration of season length, environmental conduciveness to disease, and host functional divergence can help to explain the variability in disease response to host diversity.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">19831076</PMID><DateCompleted><Year>2009</Year><Month>11</Month><Day>06</Day></DateCompleted><DateRevised><Year>2019</Year><Month>09</Month><Day>17</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">1051-0761</ISSN><JournalIssue CitedMedium="Print"><Volume>19</Volume><Issue>7</Issue><PubDate><Year>2009</Year><Month>Oct</Month></PubDate></JournalIssue><Title>Ecological applications : a publication of the Ecological Society of America</Title><ISOAbbreviation>Ecol Appl</ISOAbbreviation></Journal><ArticleTitle>Intraspecific functional diversity in hosts and its effect on disease risk across a climatic gradient.</ArticleTitle><Pagination><MedlinePgn>1868-83</MedlinePgn></Pagination><Abstract><AbstractText>The effects of host biodiversity on disease risk may vary greatly depending on host population structure and climatic conditions. Agricultural diseases such as potato late blight, caused by Phytophthora infestans, provide the opportunity to study the effects of intraspecific host diversity that is relatively well-defined in terms of disease resistance phenotypes and may have functional impacts on disease levels. When these systems are present across a climatic gradient, it is also possible to study how season length and conduciveness of the environment to disease may influence the effects of host diversity on disease risk. We developed a simple model of epidemic progress to evaluate the effects on disease risk of season length, environmental disease conduciveness, and host functional divergence for mixtures of a susceptible host and a host with some resistance. Differences in disease levels for the susceptible vs. resistant genotypes shifted over time, with the divergence in disease levels first increasing and then decreasing. Disease reductions from host diversity were greatest for high host divergence and combinations of environmental disease conduciveness and season length that led to moderate disease severity. We also compared the effects of host functional divergence on potato late-blight risk in Ecuador (long seasons), two sites in Peru (intermediate seasons) in El Niño and La Niña years, and the United States (short seasons). There was some evidence for greater disease risk reduction from host diversity where seasons were shorter, probably because of lower regional inoculum loads. There was strong evidence for greater disease reduction when host functional divergence was greater. These results indicate that consideration of season length, environmental conduciveness to disease, and host functional divergence can help to explain the variability in disease response to host diversity.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Garrett</LastName><ForeName>K A</ForeName><Initials>KA</Initials><AffiliationInfo><Affiliation>Department of Plant Pathology, 4024 Throckmorton Plant Sciences Center, Kansas State University, Manhattan, Kansas 66506, USA. kgarrett@ksu.edu</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Zúñiga</LastName><ForeName>L N</ForeName><Initials>LN</Initials></Author><Author ValidYN="Y"><LastName>Roncal</LastName><ForeName>E</ForeName><Initials>E</Initials></Author><Author ValidYN="Y"><LastName>Forbes</LastName><ForeName>G A</ForeName><Initials>GA</Initials></Author><Author ValidYN="Y"><LastName>Mundt</LastName><ForeName>C C</ForeName><Initials>CC</Initials></Author><Author ValidYN="Y"><LastName>Su</LastName><ForeName>Z</ForeName><Initials>Z</Initials></Author><Author ValidYN="Y"><LastName>Nelson</LastName><ForeName>R J</ForeName><Initials>RJ</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType><PublicationType UI="D013486">Research Support, U.S. Gov't, Non-P.H.S.</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>Ecol Appl</MedlineTA><NlmUniqueID>9889808</NlmUniqueID><ISSNLinking>1051-0761</ISSNLinking></MedlineJournalInfo><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D002980" MajorTopicYN="Y">Climate</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D004484" MajorTopicYN="N" Type="Geographic">Ecuador</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D054884" MajorTopicYN="N">Host-Pathogen Interactions</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D008954" MajorTopicYN="N">Models, Biological</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D010568" MajorTopicYN="N" Type="Geographic">Peru</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D055750" MajorTopicYN="N">Phytophthora infestans</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D010935" MajorTopicYN="N">Plant Diseases</DescriptorName><QualifierName UI="Q000382" MajorTopicYN="Y">microbiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D012307" MajorTopicYN="N">Risk Factors</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D011198" MajorTopicYN="N">Solanum tuberosum</DescriptorName><QualifierName UI="Q000382" MajorTopicYN="Y">microbiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D013997" MajorTopicYN="N">Time Factors</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D014481" MajorTopicYN="N" Type="Geographic">United States</DescriptorName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="entrez"><Year>2009</Year><Month>10</Month><Day>17</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2009</Year><Month>10</Month><Day>17</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2009</Year><Month>11</Month><Day>7</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">19831076</ArticleId><ArticleId IdType="doi">10.1890/08-0942.1</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>États-Unis</li></country></list><tree><noCountry><name sortKey="Forbes, G A" sort="Forbes, G A" uniqKey="Forbes G" first="G A" last="Forbes">G A Forbes</name><name sortKey="Mundt, C C" sort="Mundt, C C" uniqKey="Mundt C" first="C C" last="Mundt">C C Mundt</name><name sortKey="Nelson, R J" sort="Nelson, R J" uniqKey="Nelson R" first="R J" last="Nelson">R J Nelson</name><name sortKey="Roncal, E" sort="Roncal, E" uniqKey="Roncal E" first="E" last="Roncal">E. Roncal</name><name sortKey="Su, Z" sort="Su, Z" uniqKey="Su Z" first="Z" last="Su">Z. Su</name><name sortKey="Zu Iga, L N" sort="Zu Iga, L N" uniqKey="Zu Iga L" first="L N" last="Zú Iga">L N Zú Iga</name></noCountry><country name="États-Unis"><noRegion><name sortKey="Garrett, K A" sort="Garrett, K A" uniqKey="Garrett K" first="K A" last="Garrett">K A Garrett</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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