Combining Different Potato-Associated Pseudomonas Strains for Improved Biocontrol of Phytophthora infestans.
Identifieur interne : 000825 ( Main/Exploration ); précédent : 000824; suivant : 000826Combining Different Potato-Associated Pseudomonas Strains for Improved Biocontrol of Phytophthora infestans.
Auteurs : Mout De Vrieze [Suisse] ; Fanny Germanier [Suisse] ; Nicolas Vuille [Suisse] ; Laure Weisskopf [Suisse]Source :
- Frontiers in microbiology [ 1664-302X ] ; 2018.
Abstract
Late blight caused by Phytophthora infestans is considered as the most devastating disease of potato and is a re-emerging problem worldwide. Current late blight control practices rely mostly on synthetic fungicides or copper-based products, but growing awareness of the negative impact of these compounds on the environment has led to the search for alternative control measures. A collection of Pseudomonas strains isolated from both the rhizosphere and the phyllosphere of potato was recently characterized for in vitro protective effects against P. infestans. In the present study, we used a leaf disk assay with three different potato cultivars to compare the disease inhibition capacity of nine selected Pseudomonas strains when applied alone or in all possible dual and triple combinations. Results showed a strong cultivar effect and identified strains previously thought to be inactive based on in vitro assays as the best biocontrol candidates. One strain was much more active alone than in combination with other strains, while two other strains provided significantly better protection in dual combination than when applied alone. A subset of five strains was then further selected to determine their mutual influence on each other's survival and growth, as well as to characterize their activity against P. infestans in more details. This revealed that the two strains whose dual combination was particularly efficient were only weakly interfering with each other's growth and had complementary modes of action. Our results highlight the potential to harness the crop's native rhizosphere and phyllosphere microbiome through re-assembling strains with differing modes of action into small communities, thereby providing more consistent protection than with the application of single strains. We consider this as a first step toward more elaborate microbiome management efforts, which shall be integrated into global strategies for sustainable control of potato late blight.
DOI: 10.3389/fmicb.2018.02573
PubMed: 30420845
PubMed Central: PMC6215842
Affiliations:
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Current late blight control practices rely mostly on synthetic fungicides or copper-based products, but growing awareness of the negative impact of these compounds on the environment has led to the search for alternative control measures. A collection of <i>Pseudomonas</i> strains isolated from both the rhizosphere and the phyllosphere of potato was recently characterized for <i>in vitro</i> protective effects against <i>P. infestans.</i> In the present study, we used a leaf disk assay with three different potato cultivars to compare the disease inhibition capacity of nine selected <i>Pseudomonas</i> strains when applied alone or in all possible dual and triple combinations. Results showed a strong cultivar effect and identified strains previously thought to be inactive based on <i>in vitro</i> assays as the best biocontrol candidates. One strain was much more active alone than in combination with other strains, while two other strains provided significantly better protection in dual combination than when applied alone. A subset of five strains was then further selected to determine their mutual influence on each other's survival and growth, as well as to characterize their activity against <i>P. infestans</i> in more details. This revealed that the two strains whose dual combination was particularly efficient were only weakly interfering with each other's growth and had complementary modes of action. Our results highlight the potential to harness the crop's native rhizosphere and phyllosphere microbiome through re-assembling strains with differing modes of action into small communities, thereby providing more consistent protection than with the application of single strains. We consider this as a first step toward more elaborate microbiome management efforts, which shall be integrated into global strategies for sustainable control of potato late blight.</div></front></TEI><pubmed><MedlineCitation Status="PubMed-not-MEDLINE" Owner="NLM"><PMID Version="1">30420845</PMID><DateRevised><Year>2020</Year><Month>09</Month><Day>30</Day></DateRevised><Article PubModel="Electronic-eCollection"><Journal><ISSN IssnType="Print">1664-302X</ISSN><JournalIssue CitedMedium="Print"><Volume>9</Volume><PubDate><Year>2018</Year></PubDate></JournalIssue><Title>Frontiers in microbiology</Title><ISOAbbreviation>Front Microbiol</ISOAbbreviation></Journal><ArticleTitle>Combining Different Potato-Associated <i>Pseudomonas</i> Strains for Improved Biocontrol of <i>Phytophthora infestans</i>.</ArticleTitle><Pagination><MedlinePgn>2573</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.3389/fmicb.2018.02573</ELocationID><Abstract><AbstractText>Late blight caused by <i>Phytophthora infestans</i> is considered as the most devastating disease of potato and is a re-emerging problem worldwide. Current late blight control practices rely mostly on synthetic fungicides or copper-based products, but growing awareness of the negative impact of these compounds on the environment has led to the search for alternative control measures. A collection of <i>Pseudomonas</i> strains isolated from both the rhizosphere and the phyllosphere of potato was recently characterized for <i>in vitro</i> protective effects against <i>P. infestans.</i> In the present study, we used a leaf disk assay with three different potato cultivars to compare the disease inhibition capacity of nine selected <i>Pseudomonas</i> strains when applied alone or in all possible dual and triple combinations. Results showed a strong cultivar effect and identified strains previously thought to be inactive based on <i>in vitro</i> assays as the best biocontrol candidates. One strain was much more active alone than in combination with other strains, while two other strains provided significantly better protection in dual combination than when applied alone. A subset of five strains was then further selected to determine their mutual influence on each other's survival and growth, as well as to characterize their activity against <i>P. infestans</i> in more details. This revealed that the two strains whose dual combination was particularly efficient were only weakly interfering with each other's growth and had complementary modes of action. Our results highlight the potential to harness the crop's native rhizosphere and phyllosphere microbiome through re-assembling strains with differing modes of action into small communities, thereby providing more consistent protection than with the application of single strains. We consider this as a first step toward more elaborate microbiome management efforts, which shall be integrated into global strategies for sustainable control of potato late blight.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>De Vrieze</LastName><ForeName>Mout</ForeName><Initials>M</Initials><AffiliationInfo><Affiliation>Department of Biology, University of Fribourg, Fribourg, Switzerland.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>Institute for Plant Production Sciences, Agroscope, Nyon, Switzerland.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Germanier</LastName><ForeName>Fanny</ForeName><Initials>F</Initials><AffiliationInfo><Affiliation>Department of Biology, University of Fribourg, Fribourg, Switzerland.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Vuille</LastName><ForeName>Nicolas</ForeName><Initials>N</Initials><AffiliationInfo><Affiliation>Institute for Plant Production Sciences, Agroscope, Nyon, Switzerland.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Weisskopf</LastName><ForeName>Laure</ForeName><Initials>L</Initials><AffiliationInfo><Affiliation>Department of Biology, University of Fribourg, Fribourg, Switzerland.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2018</Year><Month>10</Month><Day>29</Day></ArticleDate></Article><MedlineJournalInfo><Country>Switzerland</Country><MedlineTA>Front Microbiol</MedlineTA><NlmUniqueID>101548977</NlmUniqueID><ISSNLinking>1664-302X</ISSNLinking></MedlineJournalInfo><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">Solanum tuberosum</Keyword><Keyword MajorTopicYN="N">biocontrol</Keyword><Keyword MajorTopicYN="N">consortium</Keyword><Keyword MajorTopicYN="N">late blight</Keyword><Keyword 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de Fribourg"><name sortKey="De Vrieze, Mout" sort="De Vrieze, Mout" uniqKey="De Vrieze M" first="Mout" last="De Vrieze">Mout De Vrieze</name></region><name sortKey="De Vrieze, Mout" sort="De Vrieze, Mout" uniqKey="De Vrieze M" first="Mout" last="De Vrieze">Mout De Vrieze</name><name sortKey="Germanier, Fanny" sort="Germanier, Fanny" uniqKey="Germanier F" first="Fanny" last="Germanier">Fanny Germanier</name><name sortKey="Vuille, Nicolas" sort="Vuille, Nicolas" uniqKey="Vuille N" first="Nicolas" last="Vuille">Nicolas Vuille</name><name sortKey="Weisskopf, Laure" sort="Weisskopf, Laure" uniqKey="Weisskopf L" first="Laure" last="Weisskopf">Laure Weisskopf</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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