Enhanced biological control of phytophthora blight of pepper by biosurfactant-producing pseudomonas.
Identifieur interne : 001334 ( Main/Exploration ); précédent : 001333; suivant : 001335Enhanced biological control of phytophthora blight of pepper by biosurfactant-producing pseudomonas.
Auteurs : Umit Ozyilmaz [Turquie] ; Kemal Benlioglu [Turquie]Source :
- The plant pathology journal [ 1598-2254 ] ; 2013.
Abstract
Pseudomonas isolates from different crop plants were screened for in vitro growth inhibition of Phytophthora capsici and production of biosurfactant. Two in vivo experiments were performed to determine the efficacy of selected Pseudomonas strains against Phytophthora blight of pepper by comparing two fungicide treatments [acibenzolar-S-methyl (ASM) and ASM + mefenoxam]. Bacterial isolates were applied by soil drenching (1 × 10(9) cells/ml), ASM (0.1 μg a.i./ml) and ASM + mefenoxam (0.2 mg product/ml) were applied by foliar spraying, and P. capsici inoculum was incorporated into the pot soil three days after treatments. In the first experiment, four Pseudomonas strains resulted in significant reduction from 48.4 to 61.3% in Phytophthora blight severity. In the second experiment, bacterial treatments combining with olive oil (5 mL per plant) significantly enhanced biological control activity, resulting in a reduction of disease level ranging from 56.8 to 81.1%. ASM + mefenoxam was the most effective treatment while ASM alone was less effective in both bioassays. These results indicate that our Pseudomonas fluorescens strains (6L10, 6ba6 and 3ss9) that have biosurfactant-producing abilities are effective against P. capsici on pepper, and enhanced disease suppression could be achieved when they were used in combination with olive oil.
DOI: 10.5423/PPJ.OA.11.2012.0176
PubMed: 25288970
PubMed Central: PMC4174822
Affiliations:
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Two in vivo experiments were performed to determine the efficacy of selected Pseudomonas strains against Phytophthora blight of pepper by comparing two fungicide treatments [acibenzolar-S-methyl (ASM) and ASM + mefenoxam]. Bacterial isolates were applied by soil drenching (1 × 10(9) cells/ml), ASM (0.1 μg a.i./ml) and ASM + mefenoxam (0.2 mg product/ml) were applied by foliar spraying, and P. capsici inoculum was incorporated into the pot soil three days after treatments. In the first experiment, four Pseudomonas strains resulted in significant reduction from 48.4 to 61.3% in Phytophthora blight severity. In the second experiment, bacterial treatments combining with olive oil (5 mL per plant) significantly enhanced biological control activity, resulting in a reduction of disease level ranging from 56.8 to 81.1%. ASM + mefenoxam was the most effective treatment while ASM alone was less effective in both bioassays. These results indicate that our Pseudomonas fluorescens strains (6L10, 6ba6 and 3ss9) that have biosurfactant-producing abilities are effective against P. capsici on pepper, and enhanced disease suppression could be achieved when they were used in combination with olive oil. </div></front></TEI><pubmed><MedlineCitation Status="PubMed-not-MEDLINE" Owner="NLM"><PMID Version="1">25288970</PMID><DateCompleted><Year>2014</Year><Month>10</Month><Day>07</Day></DateCompleted><DateRevised><Year>2020</Year><Month>09</Month><Day>29</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">1598-2254</ISSN><JournalIssue CitedMedium="Print"><Volume>29</Volume><Issue>4</Issue><PubDate><Year>2013</Year><Month>Dec</Month></PubDate></JournalIssue><Title>The plant pathology journal</Title><ISOAbbreviation>Plant Pathol J</ISOAbbreviation></Journal><ArticleTitle>Enhanced biological control of phytophthora blight of pepper by biosurfactant-producing pseudomonas.</ArticleTitle><Pagination><MedlinePgn>418-26</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.5423/PPJ.OA.11.2012.0176</ELocationID><Abstract><AbstractText>Pseudomonas isolates from different crop plants were screened for in vitro growth inhibition of Phytophthora capsici and production of biosurfactant. Two in vivo experiments were performed to determine the efficacy of selected Pseudomonas strains against Phytophthora blight of pepper by comparing two fungicide treatments [acibenzolar-S-methyl (ASM) and ASM + mefenoxam]. Bacterial isolates were applied by soil drenching (1 × 10(9) cells/ml), ASM (0.1 μg a.i./ml) and ASM + mefenoxam (0.2 mg product/ml) were applied by foliar spraying, and P. capsici inoculum was incorporated into the pot soil three days after treatments. In the first experiment, four Pseudomonas strains resulted in significant reduction from 48.4 to 61.3% in Phytophthora blight severity. In the second experiment, bacterial treatments combining with olive oil (5 mL per plant) significantly enhanced biological control activity, resulting in a reduction of disease level ranging from 56.8 to 81.1%. ASM + mefenoxam was the most effective treatment while ASM alone was less effective in both bioassays. These results indicate that our Pseudomonas fluorescens strains (6L10, 6ba6 and 3ss9) that have biosurfactant-producing abilities are effective against P. capsici on pepper, and enhanced disease suppression could be achieved when they were used in combination with olive oil. </AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Ozyilmaz</LastName><ForeName>Umit</ForeName><Initials>U</Initials><AffiliationInfo><Affiliation>Adnan Menderes University, Faculty of Agriculture, Plant Protection Dept. 09100/Aydin, Turkey.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Benlioglu</LastName><ForeName>Kemal</ForeName><Initials>K</Initials><AffiliationInfo><Affiliation>Adnan Menderes University, Faculty of Agriculture, Plant Protection Dept. 09100/Aydin, Turkey.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal 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