Effects of sophorolipids on fungal and oomycete pathogens in relation to pH solubility.
Identifieur interne : 000223 ( Main/Exploration ); précédent : 000222; suivant : 000224Effects of sophorolipids on fungal and oomycete pathogens in relation to pH solubility.
Auteurs : J. Chen [République populaire de Chine, États-Unis] ; X. Liu [République populaire de Chine] ; S. Fu [République populaire de Chine] ; Z. An [République populaire de Chine] ; Y. Feng [République populaire de Chine] ; R. Wang [République populaire de Chine] ; P. Ji [États-Unis]Source :
- Journal of applied microbiology [ 1365-2672 ] ; 2020.
Descripteurs français
- KwdFr :
- Acides oléiques (composition chimique), Acides oléiques (pharmacologie), Champignons (croissance et développement), Champignons (effets des médicaments et des substances chimiques), Concentration en ions d'hydrogène (MeSH), Maladies des plantes (microbiologie), Maladies des plantes (parasitologie), Maladies des plantes (prévention et contrôle), Mycelium (croissance et développement), Mycelium (effets des médicaments et des substances chimiques), Oomycetes (croissance et développement), Oomycetes (effets des médicaments et des substances chimiques), Solanum tuberosum (microbiologie), Solanum tuberosum (parasitologie), Solubilité (MeSH), Spores (croissance et développement), Spores (effets des médicaments et des substances chimiques).
- MESH :
- composition chimique : Acides oléiques.
- croissance et développement : Champignons, Mycelium, Oomycetes, Spores.
- effets des médicaments et des substances chimiques : Champignons, Mycelium, Oomycetes, Spores.
- microbiologie : Maladies des plantes, Solanum tuberosum.
- parasitologie : Maladies des plantes, Solanum tuberosum.
- pharmacologie : Acides oléiques.
- prévention et contrôle : Maladies des plantes.
- Concentration en ions d'hydrogène, Solubilité.
English descriptors
- KwdEn :
- Fungi (drug effects), Fungi (growth & development), Hydrogen-Ion Concentration (MeSH), Mycelium (drug effects), Mycelium (growth & development), Oleic Acids (chemistry), Oleic Acids (pharmacology), Oomycetes (drug effects), Oomycetes (growth & development), Plant Diseases (microbiology), Plant Diseases (parasitology), Plant Diseases (prevention & control), Solanum tuberosum (microbiology), Solanum tuberosum (parasitology), Solubility (MeSH), Spores (drug effects), Spores (growth & development).
- MESH :
- chemical , chemistry : Oleic Acids.
- drug effects : Fungi, Mycelium, Oomycetes, Spores.
- growth & development : Fungi, Mycelium, Oomycetes, Spores.
- microbiology : Plant Diseases, Solanum tuberosum.
- parasitology : Plant Diseases, Solanum tuberosum.
- chemical , pharmacology : Oleic Acids.
- prevention & control : Plant Diseases.
- Hydrogen-Ion Concentration, Solubility.
Abstract
AIMS
The objective of this study was to determine the effects of sophorolipids on several fungal and oomycete plant pathogens and the relationship between sophorolipids at different pH and antimicrobial activities.
METHODS AND RESULTS
Sophorolipids had different solubility at different pH with a dramatic increase in solubility when pH was 6 or higher. Inhibition of mycelial growth of Phytophthora infestans by sophorolipids was affected by pH values, showing that when the pH value was higher, the inhibition rate was lower. Sophorolipids inhibited spore germination and mycelial growth of several fungal and oomycete pathogens in vitro including Fusarium sp., F. oxysporum, F. concentricum, Pythium ultimum, Pyricularia oryzae, Rhizoctorzia solani, Alternaria kikuchiana, Gaeumannomyces graminis var. tritici and P. infestans and caused morphological changes in hyphae by microscope observation. Sophorolipids reduced β-1,3-glucanase activity in mycelia of P. infestans. In greenhouse studies, foliar application of sophorolipids at 3 mg ml
CONCLUSION
Sophorolipids influenced spore germination and hyphal tip growth of several plant pathogens and pH solubility of sophorolipids had an effect on their efficacy. Application of sophorolipids reduced late blight disease on potato under greenhouse conditions.
SIGNIFICANCE AND IMPACT OF THE STUDY
The findings indicated that sophorolipids have the potential to be developed as a convenient and easy-to-use formulation for managing plant diseases.
DOI: 10.1111/jam.14594
PubMed: 31995843
Affiliations:
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Chen</name><affiliation wicri:level="1"><nlm:affiliation>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan</wicri:regionArea><wicri:noRegion>Jinan</wicri:noRegion></affiliation><affiliation wicri:level="1"><nlm:affiliation>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan</wicri:regionArea><wicri:noRegion>Jinan</wicri:noRegion></affiliation><affiliation wicri:level="2"><nlm:affiliation>Department of Plant Pathology, University of Georgia, Tifton, GA, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Plant Pathology, University of Georgia, Tifton, GA</wicri:regionArea><placeName><region type="state">Géorgie (États-Unis)</region></placeName></affiliation></author><author><name sortKey="Liu, X" sort="Liu, X" uniqKey="Liu X" first="X" last="Liu">X. Liu</name><affiliation wicri:level="1"><nlm:affiliation>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan</wicri:regionArea><wicri:noRegion>Jinan</wicri:noRegion></affiliation><affiliation wicri:level="1"><nlm:affiliation>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan</wicri:regionArea><wicri:noRegion>Jinan</wicri:noRegion></affiliation></author><author><name sortKey="Fu, S" sort="Fu, S" uniqKey="Fu S" first="S" last="Fu">S. Fu</name><affiliation wicri:level="1"><nlm:affiliation>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan</wicri:regionArea><wicri:noRegion>Jinan</wicri:noRegion></affiliation><affiliation wicri:level="1"><nlm:affiliation>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan</wicri:regionArea><wicri:noRegion>Jinan</wicri:noRegion></affiliation></author><author><name sortKey="An, Z" sort="An, Z" uniqKey="An Z" first="Z" last="An">Z. An</name><affiliation wicri:level="1"><nlm:affiliation>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan</wicri:regionArea><wicri:noRegion>Jinan</wicri:noRegion></affiliation><affiliation wicri:level="1"><nlm:affiliation>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan</wicri:regionArea><wicri:noRegion>Jinan</wicri:noRegion></affiliation></author><author><name sortKey="Feng, Y" sort="Feng, Y" uniqKey="Feng Y" first="Y" last="Feng">Y. Feng</name><affiliation wicri:level="1"><nlm:affiliation>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan</wicri:regionArea><wicri:noRegion>Jinan</wicri:noRegion></affiliation><affiliation wicri:level="1"><nlm:affiliation>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan</wicri:regionArea><wicri:noRegion>Jinan</wicri:noRegion></affiliation></author><author><name sortKey="Wang, R" sort="Wang, R" uniqKey="Wang R" first="R" last="Wang">R. Wang</name><affiliation wicri:level="1"><nlm:affiliation>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan</wicri:regionArea><wicri:noRegion>Jinan</wicri:noRegion></affiliation><affiliation wicri:level="1"><nlm:affiliation>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan</wicri:regionArea><wicri:noRegion>Jinan</wicri:noRegion></affiliation></author><author><name sortKey="Ji, P" sort="Ji, P" uniqKey="Ji P" first="P" last="Ji">P. Ji</name><affiliation wicri:level="2"><nlm:affiliation>Department of Plant Pathology, University of Georgia, Tifton, GA, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Plant Pathology, University of Georgia, Tifton, GA</wicri:regionArea><placeName><region type="state">Géorgie (États-Unis)</region></placeName></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2020">2020</date><idno type="RBID">pubmed:31995843</idno><idno type="pmid">31995843</idno><idno type="doi">10.1111/jam.14594</idno><idno type="wicri:Area/Main/Corpus">000288</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">000288</idno><idno type="wicri:Area/Main/Curation">000288</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Curation">000288</idno><idno type="wicri:Area/Main/Exploration">000288</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Effects of sophorolipids on fungal and oomycete pathogens in relation to pH solubility.</title><author><name sortKey="Chen, J" sort="Chen, J" uniqKey="Chen J" first="J" last="Chen">J. Chen</name><affiliation wicri:level="1"><nlm:affiliation>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan</wicri:regionArea><wicri:noRegion>Jinan</wicri:noRegion></affiliation><affiliation wicri:level="1"><nlm:affiliation>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan</wicri:regionArea><wicri:noRegion>Jinan</wicri:noRegion></affiliation><affiliation wicri:level="2"><nlm:affiliation>Department of Plant Pathology, University of Georgia, Tifton, GA, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Plant Pathology, University of Georgia, Tifton, GA</wicri:regionArea><placeName><region type="state">Géorgie (États-Unis)</region></placeName></affiliation></author><author><name sortKey="Liu, X" sort="Liu, X" uniqKey="Liu X" first="X" last="Liu">X. Liu</name><affiliation wicri:level="1"><nlm:affiliation>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan</wicri:regionArea><wicri:noRegion>Jinan</wicri:noRegion></affiliation><affiliation wicri:level="1"><nlm:affiliation>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan</wicri:regionArea><wicri:noRegion>Jinan</wicri:noRegion></affiliation></author><author><name sortKey="Fu, S" sort="Fu, S" uniqKey="Fu S" first="S" last="Fu">S. Fu</name><affiliation wicri:level="1"><nlm:affiliation>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan</wicri:regionArea><wicri:noRegion>Jinan</wicri:noRegion></affiliation><affiliation wicri:level="1"><nlm:affiliation>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan</wicri:regionArea><wicri:noRegion>Jinan</wicri:noRegion></affiliation></author><author><name sortKey="An, Z" sort="An, Z" uniqKey="An Z" first="Z" last="An">Z. An</name><affiliation wicri:level="1"><nlm:affiliation>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan</wicri:regionArea><wicri:noRegion>Jinan</wicri:noRegion></affiliation><affiliation wicri:level="1"><nlm:affiliation>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan</wicri:regionArea><wicri:noRegion>Jinan</wicri:noRegion></affiliation></author><author><name sortKey="Feng, Y" sort="Feng, Y" uniqKey="Feng Y" first="Y" last="Feng">Y. Feng</name><affiliation wicri:level="1"><nlm:affiliation>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan</wicri:regionArea><wicri:noRegion>Jinan</wicri:noRegion></affiliation><affiliation wicri:level="1"><nlm:affiliation>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan</wicri:regionArea><wicri:noRegion>Jinan</wicri:noRegion></affiliation></author><author><name sortKey="Wang, R" sort="Wang, R" uniqKey="Wang R" first="R" last="Wang">R. Wang</name><affiliation wicri:level="1"><nlm:affiliation>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan</wicri:regionArea><wicri:noRegion>Jinan</wicri:noRegion></affiliation><affiliation wicri:level="1"><nlm:affiliation>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan</wicri:regionArea><wicri:noRegion>Jinan</wicri:noRegion></affiliation></author><author><name sortKey="Ji, P" sort="Ji, P" uniqKey="Ji P" first="P" last="Ji">P. Ji</name><affiliation wicri:level="2"><nlm:affiliation>Department of Plant Pathology, University of Georgia, Tifton, GA, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Plant Pathology, University of Georgia, Tifton, GA</wicri:regionArea><placeName><region type="state">Géorgie (États-Unis)</region></placeName></affiliation></author></analytic><series><title level="j">Journal of applied microbiology</title><idno type="eISSN">1365-2672</idno><imprint><date when="2020" type="published">2020</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Fungi (drug effects)</term><term>Fungi (growth & development)</term><term>Hydrogen-Ion Concentration (MeSH)</term><term>Mycelium (drug effects)</term><term>Mycelium (growth & development)</term><term>Oleic Acids (chemistry)</term><term>Oleic Acids (pharmacology)</term><term>Oomycetes (drug effects)</term><term>Oomycetes (growth & development)</term><term>Plant Diseases (microbiology)</term><term>Plant Diseases (parasitology)</term><term>Plant Diseases (prevention & control)</term><term>Solanum tuberosum (microbiology)</term><term>Solanum tuberosum (parasitology)</term><term>Solubility (MeSH)</term><term>Spores (drug effects)</term><term>Spores (growth & development)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Acides oléiques (composition chimique)</term><term>Acides oléiques (pharmacologie)</term><term>Champignons (croissance et développement)</term><term>Champignons (effets des médicaments et des substances chimiques)</term><term>Concentration en ions d'hydrogène (MeSH)</term><term>Maladies des plantes (microbiologie)</term><term>Maladies des plantes (parasitologie)</term><term>Maladies des plantes (prévention et contrôle)</term><term>Mycelium (croissance et développement)</term><term>Mycelium (effets des médicaments et des substances chimiques)</term><term>Oomycetes (croissance et développement)</term><term>Oomycetes (effets des médicaments et des substances chimiques)</term><term>Solanum tuberosum (microbiologie)</term><term>Solanum tuberosum (parasitologie)</term><term>Solubilité (MeSH)</term><term>Spores (croissance et développement)</term><term>Spores (effets des médicaments et des substances chimiques)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Oleic Acids</term></keywords><keywords scheme="MESH" qualifier="composition chimique" xml:lang="fr"><term>Acides oléiques</term></keywords><keywords scheme="MESH" qualifier="croissance et développement" xml:lang="fr"><term>Champignons</term><term>Mycelium</term><term>Oomycetes</term><term>Spores</term></keywords><keywords scheme="MESH" qualifier="drug effects" xml:lang="en"><term>Fungi</term><term>Mycelium</term><term>Oomycetes</term><term>Spores</term></keywords><keywords scheme="MESH" qualifier="effets des médicaments et des substances chimiques" xml:lang="fr"><term>Champignons</term><term>Mycelium</term><term>Oomycetes</term><term>Spores</term></keywords><keywords scheme="MESH" qualifier="growth & development" xml:lang="en"><term>Fungi</term><term>Mycelium</term><term>Oomycetes</term><term>Spores</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="parasitologie" xml:lang="fr"><term>Maladies des plantes</term><term>Solanum tuberosum</term></keywords><keywords scheme="MESH" qualifier="parasitology" xml:lang="en"><term>Plant Diseases</term><term>Solanum tuberosum</term></keywords><keywords scheme="MESH" qualifier="pharmacologie" xml:lang="fr"><term>Acides oléiques</term></keywords><keywords scheme="MESH" type="chemical" qualifier="pharmacology" xml:lang="en"><term>Oleic Acids</term></keywords><keywords scheme="MESH" qualifier="prevention & control" xml:lang="en"><term>Plant Diseases</term></keywords><keywords scheme="MESH" qualifier="prévention et contrôle" xml:lang="fr"><term>Maladies des plantes</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Hydrogen-Ion Concentration</term><term>Solubility</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Concentration en ions d'hydrogène</term><term>Solubilité</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p><b>AIMS</b></p><p>The objective of this study was to determine the effects of sophorolipids on several fungal and oomycete plant pathogens and the relationship between sophorolipids at different pH and antimicrobial activities.</p></div><div type="abstract" xml:lang="en"><p><b>METHODS AND RESULTS</b></p><p>Sophorolipids had different solubility at different pH with a dramatic increase in solubility when pH was 6 or higher. Inhibition of mycelial growth of Phytophthora infestans by sophorolipids was affected by pH values, showing that when the pH value was higher, the inhibition rate was lower. Sophorolipids inhibited spore germination and mycelial growth of several fungal and oomycete pathogens in vitro including Fusarium sp., F. oxysporum, F. concentricum, Pythium ultimum, Pyricularia oryzae, Rhizoctorzia solani, Alternaria kikuchiana, Gaeumannomyces graminis var. tritici and P. infestans and caused morphological changes in hyphae by microscope observation. Sophorolipids reduced β-1,3-glucanase activity in mycelia of P. infestans. In greenhouse studies, foliar application of sophorolipids at 3 mg ml</p></div><div type="abstract" xml:lang="en"><p><b>CONCLUSION</b></p><p>Sophorolipids influenced spore germination and hyphal tip growth of several plant pathogens and pH solubility of sophorolipids had an effect on their efficacy. Application of sophorolipids reduced late blight disease on potato under greenhouse conditions.</p></div><div type="abstract" xml:lang="en"><p><b>SIGNIFICANCE AND IMPACT OF THE STUDY</b></p><p>The findings indicated that sophorolipids have the potential to be developed as a convenient and easy-to-use formulation for managing plant diseases.</p></div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" IndexingMethod="Curated" Owner="NLM"><PMID Version="1">31995843</PMID><DateCompleted><Year>2020</Year><Month>08</Month><Day>21</Day></DateCompleted><DateRevised><Year>2020</Year><Month>08</Month><Day>21</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1365-2672</ISSN><JournalIssue CitedMedium="Internet"><Volume>128</Volume><Issue>6</Issue><PubDate><Year>2020</Year><Month>Jun</Month></PubDate></JournalIssue><Title>Journal of applied microbiology</Title><ISOAbbreviation>J Appl Microbiol</ISOAbbreviation></Journal><ArticleTitle>Effects of sophorolipids on fungal and oomycete pathogens in relation to pH solubility.</ArticleTitle><Pagination><MedlinePgn>1754-1763</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1111/jam.14594</ELocationID><Abstract><AbstractText Label="AIMS" NlmCategory="OBJECTIVE">The objective of this study was to determine the effects of sophorolipids on several fungal and oomycete plant pathogens and the relationship between sophorolipids at different pH and antimicrobial activities.</AbstractText><AbstractText Label="METHODS AND RESULTS" NlmCategory="RESULTS">Sophorolipids had different solubility at different pH with a dramatic increase in solubility when pH was 6 or higher. Inhibition of mycelial growth of Phytophthora infestans by sophorolipids was affected by pH values, showing that when the pH value was higher, the inhibition rate was lower. Sophorolipids inhibited spore germination and mycelial growth of several fungal and oomycete pathogens in vitro including Fusarium sp., F. oxysporum, F. concentricum, Pythium ultimum, Pyricularia oryzae, Rhizoctorzia solani, Alternaria kikuchiana, Gaeumannomyces graminis var. tritici and P. infestans and caused morphological changes in hyphae by microscope observation. Sophorolipids reduced β-1,3-glucanase activity in mycelia of P. infestans. In greenhouse studies, foliar application of sophorolipids at 3 mg ml<sup>-1</sup> reduced severity of late blight of potato caused by P. infestans significantly.</AbstractText><AbstractText Label="CONCLUSION" NlmCategory="CONCLUSIONS">Sophorolipids influenced spore germination and hyphal tip growth of several plant pathogens and pH solubility of sophorolipids had an effect on their efficacy. Application of sophorolipids reduced late blight disease on potato under greenhouse conditions.</AbstractText><AbstractText Label="SIGNIFICANCE AND IMPACT OF THE STUDY" NlmCategory="CONCLUSIONS">The findings indicated that sophorolipids have the potential to be developed as a convenient and easy-to-use formulation for managing plant diseases.</AbstractText><CopyrightInformation>© 2020 The Society for Applied Microbiology.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Chen</LastName><ForeName>J</ForeName><Initials>J</Initials><Identifier Source="ORCID">https://orcid.org/0000-0003-0451-2292</Identifier><AffiliationInfo><Affiliation>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>Department of Plant Pathology, University of Georgia, Tifton, GA, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Liu</LastName><ForeName>X</ForeName><Initials>X</Initials><AffiliationInfo><Affiliation>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Fu</LastName><ForeName>S</ForeName><Initials>S</Initials><AffiliationInfo><Affiliation>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>An</LastName><ForeName>Z</ForeName><Initials>Z</Initials><AffiliationInfo><Affiliation>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Feng</LastName><ForeName>Y</ForeName><Initials>Y</Initials><AffiliationInfo><Affiliation>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Wang</LastName><ForeName>R</ForeName><Initials>R</Initials><AffiliationInfo><Affiliation>State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Ji</LastName><ForeName>P</ForeName><Initials>P</Initials><Identifier Source="ORCID">https://orcid.org/0000-0003-3139-9117</Identifier><AffiliationInfo><Affiliation>Department of Plant Pathology, University of Georgia, Tifton, GA, USA.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><GrantList CompleteYN="Y"><Grant><GrantID>2018YYSP018</GrantID><Agency>Research and Development</Agency><Country></Country></Grant><Grant><Agency>Shandong Province</Agency><Country></Country></Grant></GrantList><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2020</Year><Month>02</Month><Day>20</Day></ArticleDate></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>J Appl Microbiol</MedlineTA><NlmUniqueID>9706280</NlmUniqueID><ISSNLinking>1364-5072</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D009829">Oleic Acids</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="C000627985">sophorolipid</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D005658" MajorTopicYN="N">Fungi</DescriptorName><QualifierName UI="Q000187" MajorTopicYN="Y">drug effects</QualifierName><QualifierName UI="Q000254" MajorTopicYN="N">growth & development</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D006863" MajorTopicYN="N">Hydrogen-Ion Concentration</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D025282" MajorTopicYN="N">Mycelium</DescriptorName><QualifierName UI="Q000187" MajorTopicYN="N">drug effects</QualifierName><QualifierName UI="Q000254" MajorTopicYN="N">growth & development</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D009829" MajorTopicYN="N">Oleic Acids</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName><QualifierName UI="Q000494" MajorTopicYN="Y">pharmacology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D009868" MajorTopicYN="N">Oomycetes</DescriptorName><QualifierName UI="Q000187" MajorTopicYN="Y">drug effects</QualifierName><QualifierName UI="Q000254" MajorTopicYN="N">growth & development</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D010935" MajorTopicYN="N">Plant Diseases</DescriptorName><QualifierName UI="Q000382" MajorTopicYN="N">microbiology</QualifierName><QualifierName UI="Q000469" MajorTopicYN="N">parasitology</QualifierName><QualifierName UI="Q000517" MajorTopicYN="N">prevention & control</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D011198" MajorTopicYN="N">Solanum tuberosum</DescriptorName><QualifierName UI="Q000382" MajorTopicYN="N">microbiology</QualifierName><QualifierName UI="Q000469" MajorTopicYN="N">parasitology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D012995" MajorTopicYN="N">Solubility</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D013170" MajorTopicYN="N">Spores</DescriptorName><QualifierName UI="Q000187" MajorTopicYN="N">drug effects</QualifierName><QualifierName UI="Q000254" MajorTopicYN="N">growth & development</QualifierName></MeshHeading></MeshHeadingList><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">Phytophthora infestans
</Keyword><Keyword MajorTopicYN="N">late blight of potato</Keyword><Keyword MajorTopicYN="N">pH solubility</Keyword><Keyword MajorTopicYN="N">plant pathogen</Keyword><Keyword MajorTopicYN="N">sophorolipids</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2019</Year><Month>10</Month><Day>14</Day></PubMedPubDate><PubMedPubDate PubStatus="revised"><Year>2019</Year><Month>12</Month><Day>30</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2020</Year><Month>01</Month><Day>17</Day></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2020</Year><Month>1</Month><Day>30</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2020</Year><Month>8</Month><Day>22</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2020</Year><Month>1</Month><Day>30</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">31995843</ArticleId><ArticleId IdType="doi">10.1111/jam.14594</ArticleId></ArticleIdList><ReferenceList><Title>References</Title><Reference><Citation>Asmer, H.J., Lang, S., Wagner, F. and Wray, V. 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An</name><name sortKey="Chen, J" sort="Chen, J" uniqKey="Chen J" first="J" last="Chen">J. Chen</name><name sortKey="Feng, Y" sort="Feng, Y" uniqKey="Feng Y" first="Y" last="Feng">Y. Feng</name><name sortKey="Feng, Y" sort="Feng, Y" uniqKey="Feng Y" first="Y" last="Feng">Y. Feng</name><name sortKey="Fu, S" sort="Fu, S" uniqKey="Fu S" first="S" last="Fu">S. Fu</name><name sortKey="Fu, S" sort="Fu, S" uniqKey="Fu S" first="S" last="Fu">S. Fu</name><name sortKey="Liu, X" sort="Liu, X" uniqKey="Liu X" first="X" last="Liu">X. Liu</name><name sortKey="Liu, X" sort="Liu, X" uniqKey="Liu X" first="X" last="Liu">X. Liu</name><name sortKey="Wang, R" sort="Wang, R" uniqKey="Wang R" first="R" last="Wang">R. Wang</name><name sortKey="Wang, R" sort="Wang, R" uniqKey="Wang R" first="R" last="Wang">R. Wang</name></country><country name="États-Unis"><region name="Géorgie (États-Unis)"><name sortKey="Chen, J" sort="Chen, J" uniqKey="Chen J" first="J" last="Chen">J. 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