Role of prodigiosin and chitinases in antagonistic activity of the bacterium Serratia marcescens against the fungus Didymella applanata

The molecular features of antagonism of the bacterium Serratia marcescens against the plant pathogenic fungus Didymella applanata have been studied. The chitinases and the red pigment prodigiosin (PG) of S. marcescens were isolated and characterized. Specific antifungal activity of the purified PG a...

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Bibliographic Details
Published in:Biochemistry (Moscow) 2012-08, Vol.77 (8), p.910-916
Main Authors: Duzhak, A. B., Panfilova, Z. I., Duzhak, T. G., Vasyunina, E. A., Shternshis, M. V.
Format: Article
Language:English
Subjects:
Antifungal agents
Antifungal Agents - chemistry
Antifungal Agents - isolation & purification
Antifungal Agents - pharmacology
Ascomycota - drug effects
Ascomycota - growth & development
Ascomycota - metabolism
Bacteria
Biochemistry
Biomedical and Life Sciences
Biomedicine
Bioorganic Chemistry
Chitinases - isolation & purification
Chitinases - metabolism
Didymella
Dose-Response Relationship, Drug
Enzymes
Fungi
Life Sciences
Microbial Sensitivity Tests
Microbiology
Molecular biology
Prodigiosin - chemistry
Prodigiosin - isolation & purification
Prodigiosin - pharmacology
Serratia marcescens
Serratia marcescens - metabolism
Structure-Activity Relationship
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Summary:The molecular features of antagonism of the bacterium Serratia marcescens against the plant pathogenic fungus Didymella applanata have been studied. The chitinases and the red pigment prodigiosin (PG) of S. marcescens were isolated and characterized. Specific antifungal activity of the purified PG and chitinases against D. applanata was tested in vitro . The antagonistic properties of several S. marcescens strains exhibiting different levels of PG and chitinase production were analyzed in vitro with regard to D. applanata . It was found that the ability of S. marcescens to suppress the vital functions of D. applanata depends mainly on the level of PG production, whereas chitinase production does not provide the bacterium with any competitive advantage over the fungus.
ISSN:0006-2979
1608-3040
DOI:10.1134/S0006297912080123