| Inhibition of citrus fungal pathogens by using lactic acid bacteria. | |
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MedLine Citation:
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PMID: 20722936 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The effect of lactic acid bacteria (LAB) on pathogenic fungi was evaluated and the metabolites involved in the antifungal effect were characterized. Penicillium digitatum (INTA 1 to INTA 7) and Geotrichum citri-aurantii (INTA 8) isolated from decayed lemon from commercial packinghouses were treated with imazalil and guazatine to obtain strains resistant to these fungicides. The most resistant strains (4 fungal strains) were selected for evaluating the antifungal activity of 33 LAB strains, among which only 8 strains gave positive results. The antifungal activity of these LAB strains was related to the production of lactic acid, acetic acid, and phenyllactic acid (PLA). A central composite design and the response surface methodology were used to evaluate the inhibitory effect of the organic acids produced by the LAB cultures. The antifungal activity of lactic acid was directly related to its concentration; however, acetic acid and PLA showed a peak of activity at 52.5 and 0.8 mM, respectively, with inhibition rates similar to those obtained with Serenade((R)) (3.0 ppm) imazalil (50 ppm) and guazatine (50 ppm). Beyond the peak of activity, a reduction in effectiveness of both acetic acid and PLA was observed. Comparing the inhibition rate of the organic acids, PLA was about 66- and 600-fold more effective than acetic acid and lactic acid, respectively. This study presents evidences on the antifungal effect of selected LAB strains and their end products. Studies are currently being undertaken to evaluate the effectiveness in preventing postharvest diseases on citrus fruits. |
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Authors:
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C L Gerez; M S Carbajo; G Rollán; G Torres Leal; G Font de Valdez |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of food science Volume: 75 ISSN: 1750-3841 ISO Abbreviation: J. Food Sci. Publication Date: 2010 Aug |
Date Detail:
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Created Date: 2010-08-20 Completed Date: 2011-01-18 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0014052 Medline TA: J Food Sci Country: United States |
Other Details:
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Languages: eng Pagination: M354-9 Citation Subset: IM |
Affiliation:
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Centro de Referencia para Lactobacilos, CONICET, Tucumán, Argentina. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acetic Acid
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metabolism,
pharmacology Antibiosis* Antifungal Agents / metabolism, pharmacology Bacteriocins / metabolism*, pharmacology* Citrus / microbiology* Drug Resistance, Multiple, Fungal Food Preservation / methods Fruit / microbiology Fungi / drug effects*, growth & development*, isolation & purification Fungicides, Industrial / pharmacology Geotrichum / drug effects, growth & development, isolation & purification Guanidines / pharmacology Imidazoles / pharmacology Lactates / metabolism, pharmacology Lactic Acid / metabolism, pharmacology Lactobacillales / metabolism* Models, Statistical Osmolar Concentration Penicillium / drug effects, growth & development, isolation & purification Pest Control, Biological Species Specificity |
| Chemical | |
Reg. No./Substance:
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0/Antifungal Agents; 0/Bacteriocins; 0/Fungicides, Industrial; 0/Guanidines; 0/Imidazoles; 0/Lactates; 13516-27-3/guazatine; 156-05-8/3-phenyllactic acid; 35554-44-0/imazalil; 50-21-5/Lactic Acid; 64-19-7/Acetic Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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