Order of microbial succession affects rhizobia-mediated biocontrol efforts against Phytophthora root rot.
Identifieur interne : 000101 ( Main/Exploration ); précédent : 000100; suivant : 000102Order of microbial succession affects rhizobia-mediated biocontrol efforts against Phytophthora root rot.
Auteurs : J M Plett [Australie] ; J. Solomon [Australie] ; F. Snijders [Australie] ; J. Marlow-Conway [Australie] ; K L Plett [Australie] ; S L Bithell [Australie]Source :
- Microbiological research [ 1618-0623 ] ; 2020.
Abstract
The management of soilborne root diseases in pulse crops is challenged by a limited range of resistance sources and often a complete absence of in-crop management options. Therefore, alternative management strategies need to be developed. We evaluated disease limiting interactions between the rhizobia species Mesorhizobium ciceri, and the oomycete pathogen Phytophthora medicaginis, which causes Phytophthora root rot (PRR) of chickpea (Cicer arietinum). For the PRR susceptible var. Sonali plants, post-pathogen M. ciceri inoculation significantly improved probability of plant survival when compared to P. medicaginis infected plants only pre-inoculated with M. ciceri (75 % versus 35 %, respectively). Potential mechanisms for these effects were investigated: rhizobia inoculation benefits to plant nodulation were not demonstrated, but the highest nodule N-fixation activity of P. medicaginis inoculated plants occurred for the post-pathogen M. ciceri treatment; rhizobia inoculation treatment did not reduce lesion development but certain combinations of microbial inoculation led to significant reduction in root growth. Microcosm studies, however, showed that the presence of M. ciceri reduced growth of P. medicaginis isolates. Putative chickpea disease resistance gene expression was evaluated using qPCR in var. Sonali roots. When var. Sonali plants were treated with M. ciceri post-P. medicaginis inoculation, the gene regulation in the plant host became more similar to PRR moderately resistant var. PBA HatTrick. These results suggest that M. ciceri application post P. medicaginis inoculation may improve plant survival by inducing defense responses similar to a PRR moderately resistant chickpea variety. Altogether, these results indicate that order of microbial succession can significantly affect PRR plant survial in susceptible chickpea under controlled conditions and improved plant survival effects are due to a number of different mechanisms including improved host nutrition, through direct inhibiton of pathogen growth, as well as host defense priming.
DOI: 10.1016/j.micres.2020.126628
PubMed: 33153885
Affiliations:
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Therefore, alternative management strategies need to be developed. We evaluated disease limiting interactions between the rhizobia species Mesorhizobium ciceri, and the oomycete pathogen Phytophthora medicaginis, which causes Phytophthora root rot (PRR) of chickpea (Cicer arietinum). For the PRR susceptible var. Sonali plants, post-pathogen M. ciceri inoculation significantly improved probability of plant survival when compared to P. medicaginis infected plants only pre-inoculated with M. ciceri (75 % versus 35 %, respectively). Potential mechanisms for these effects were investigated: rhizobia inoculation benefits to plant nodulation were not demonstrated, but the highest nodule N-fixation activity of P. medicaginis inoculated plants occurred for the post-pathogen M. ciceri treatment; rhizobia inoculation treatment did not reduce lesion development but certain combinations of microbial inoculation led to significant reduction in root growth. Microcosm studies, however, showed that the presence of M. ciceri reduced growth of P. medicaginis isolates. Putative chickpea disease resistance gene expression was evaluated using qPCR in var. Sonali roots. When var. Sonali plants were treated with M. ciceri post-P. medicaginis inoculation, the gene regulation in the plant host became more similar to PRR moderately resistant var. PBA HatTrick. These results suggest that M. ciceri application post P. medicaginis inoculation may improve plant survival by inducing defense responses similar to a PRR moderately resistant chickpea variety. Altogether, these results indicate that order of microbial succession can significantly affect PRR plant survial in susceptible chickpea under controlled conditions and improved plant survival effects are due to a number of different mechanisms including improved host nutrition, through direct inhibiton of pathogen growth, as well as host defense priming.</div></front></TEI><pubmed><MedlineCitation Status="Publisher" Owner="NLM"><PMID Version="1">33153885</PMID><DateRevised><Year>2020</Year><Month>11</Month><Day>06</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1618-0623</ISSN><JournalIssue CitedMedium="Internet"><PubDate><Year>2020</Year><Month>Oct</Month><Day>19</Day></PubDate></JournalIssue><Title>Microbiological research</Title><ISOAbbreviation>Microbiol Res</ISOAbbreviation></Journal><ArticleTitle>Order of microbial succession affects rhizobia-mediated biocontrol efforts against Phytophthora root rot.</ArticleTitle><Pagination><MedlinePgn>126628</MedlinePgn></Pagination><ELocationID EIdType="pii" ValidYN="Y">S0944-5013(20)30496-1</ELocationID><ELocationID EIdType="doi" ValidYN="Y">10.1016/j.micres.2020.126628</ELocationID><Abstract><AbstractText>The management of soilborne root diseases in pulse crops is challenged by a limited range of resistance sources and often a complete absence of in-crop management options. Therefore, alternative management strategies need to be developed. We evaluated disease limiting interactions between the rhizobia species Mesorhizobium ciceri, and the oomycete pathogen Phytophthora medicaginis, which causes Phytophthora root rot (PRR) of chickpea (Cicer arietinum). For the PRR susceptible var. Sonali plants, post-pathogen M. ciceri inoculation significantly improved probability of plant survival when compared to P. medicaginis infected plants only pre-inoculated with M. ciceri (75 % versus 35 %, respectively). Potential mechanisms for these effects were investigated: rhizobia inoculation benefits to plant nodulation were not demonstrated, but the highest nodule N-fixation activity of P. medicaginis inoculated plants occurred for the post-pathogen M. ciceri treatment; rhizobia inoculation treatment did not reduce lesion development but certain combinations of microbial inoculation led to significant reduction in root growth. Microcosm studies, however, showed that the presence of M. ciceri reduced growth of P. medicaginis isolates. Putative chickpea disease resistance gene expression was evaluated using qPCR in var. Sonali roots. When var. Sonali plants were treated with M. ciceri post-P. medicaginis inoculation, the gene regulation in the plant host became more similar to PRR moderately resistant var. PBA HatTrick. These results suggest that M. ciceri application post P. medicaginis inoculation may improve plant survival by inducing defense responses similar to a PRR moderately resistant chickpea variety. Altogether, these results indicate that order of microbial succession can significantly affect PRR plant survial in susceptible chickpea under controlled conditions and improved plant survival effects are due to a number of different mechanisms including improved host nutrition, through direct inhibiton of pathogen growth, as well as host defense priming.</AbstractText><CopyrightInformation>Copyright © 2020 Elsevier GmbH. All rights reserved.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Plett</LastName><ForeName>J M</ForeName><Initials>JM</Initials><AffiliationInfo><Affiliation>Hawkesbury Institute for the Environment, University of Western Sydney, Richmond, NSW, 2753, Australia. Electronic address: j.plett@westernsydney.edu.au.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Solomon</LastName><ForeName>J</ForeName><Initials>J</Initials><AffiliationInfo><Affiliation>Hawkesbury Institute for the Environment, University of Western Sydney, Richmond, NSW, 2753, Australia.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Snijders</LastName><ForeName>F</ForeName><Initials>F</Initials><AffiliationInfo><Affiliation>Hawkesbury Institute for the Environment, University of Western Sydney, Richmond, NSW, 2753, Australia.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Marlow-Conway</LastName><ForeName>J</ForeName><Initials>J</Initials><AffiliationInfo><Affiliation>Hawkesbury Institute for the Environment, University of Western Sydney, Richmond, NSW, 2753, Australia.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Plett</LastName><ForeName>K L</ForeName><Initials>KL</Initials><AffiliationInfo><Affiliation>Hawkesbury Institute for the Environment, University of Western Sydney, Richmond, NSW, 2753, Australia.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Bithell</LastName><ForeName>S L</ForeName><Initials>SL</Initials><AffiliationInfo><Affiliation>New South Wales Department of Primary Industries, Tamworth, NSW, 2340, Australia.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2020</Year><Month>10</Month><Day>19</Day></ArticleDate></Article><MedlineJournalInfo><Country>Germany</Country><MedlineTA>Microbiol Res</MedlineTA><NlmUniqueID>9437794</NlmUniqueID><ISSNLinking>0944-5013</ISSNLinking></MedlineJournalInfo><CitationSubset>IM</CitationSubset><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">Chickpea</Keyword><Keyword MajorTopicYN="N">Disease resistance</Keyword><Keyword MajorTopicYN="N">Gene expression</Keyword><Keyword MajorTopicYN="N">Plant survival</Keyword><Keyword MajorTopicYN="N">Root disease</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2020</Year><Month>09</Month><Day>04</Day></PubMedPubDate><PubMedPubDate PubStatus="revised"><Year>2020</Year><Month>10</Month><Day>13</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2020</Year><Month>10</Month><Day>14</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2020</Year><Month>11</Month><Day>6</Day><Hour>5</Hour><Minute>43</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2020</Year><Month>11</Month><Day>7</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2020</Year><Month>11</Month><Day>7</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>aheadofprint</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">33153885</ArticleId><ArticleId IdType="pii">S0944-5013(20)30496-1</ArticleId><ArticleId IdType="doi">10.1016/j.micres.2020.126628</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>Australie</li></country></list><tree><country name="Australie"><noRegion><name sortKey="Plett, J M" sort="Plett, J M" uniqKey="Plett J" first="J M" last="Plett">J M Plett</name></noRegion><name sortKey="Bithell, S L" sort="Bithell, S L" uniqKey="Bithell S" first="S L" last="Bithell">S L Bithell</name><name sortKey="Marlow Conway, J" sort="Marlow Conway, J" uniqKey="Marlow Conway J" first="J" last="Marlow-Conway">J. Marlow-Conway</name><name sortKey="Plett, K L" sort="Plett, K L" uniqKey="Plett K" first="K L" last="Plett">K L Plett</name><name sortKey="Snijders, F" sort="Snijders, F" uniqKey="Snijders F" first="F" last="Snijders">F. Snijders</name><name sortKey="Solomon, J" sort="Solomon, J" uniqKey="Solomon J" first="J" last="Solomon">J. Solomon</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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