Production of prodigiosin and chitinases by tropical Serratia marcescens strains with potential to control plant pathogens
| Autor: | Ricardo Bello-Mendoza, Graciela Huerta-Palacios, Martha Ingrid Gutiérrez-Román, Karina Guillén-Navarro, Francisco Holguín-Meléndez, Michael F. Dunn |
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| Rok vydání: | 2011 |
| Předmět: |
DNA
Bacterial Physiology Metabolite Biological pest control Applied Microbiology and Biotechnology Microbiology Prodigiosin chemistry.chemical_compound Bacterial Proteins Chitin RNA Ribosomal 16S Colletotrichum Food science Mexico Serratia marcescens Mycelium Plant Diseases Tropical Climate Mangifera Base Sequence Strain (chemistry) biology Carica Chitinases food and beverages General Medicine biology.organism_classification Culture Media RNA Bacterial Biological Control Agents chemistry DNA Gyrase Genes Bacterial Germination Fruit Biotechnology |
| Zdroj: | World Journal of Microbiology and Biotechnology. 28:145-153 |
| ISSN: | 1573-0972 0959-3993 |
| Popis: | The potential of three Serratia marcescens strains (CFFSUR-B2, CFFSUR-B3 and CFFSUR-B4) isolated from tropical regions in Mexico to inhibit the mycelial growth and conidial germination of Colletotrichum gloeosporioides, causal agent of fruit anthracnose, was evaluated. The ability of these strains to produce prodigiosin and chitinases when cultivated in oil seed-based media (peanut, sesame, soybean and castor bean) and in Luria-Bertani medium was determined. All of the strains exhibited similar fungal antagonistic activities and inhibited myceliar growth by more than 40% while inhibiting conidial germination by 81-89% (P = 0.01). The highest level of prodigiosin (40 μg/ml) was produced in the peanut-based medium while growth in soybean-based medium allowed the highest production of chitinases (56 units/ml), independent of the strain used. Strain CFFSUR-B2 grown in peanut medium was used to evaluate the effect of inoculum density and initial pH on metabolite production. The amount of prodigiosin produced increased with greater inoculum densities, with an initial density of 1 × 10(12) resulting in the highest production (60 μg/ml). Prodigiosin production was not affected by pH. The strains studied have the advantage of being adapted to tropical climates and are able to produce chitinases in the absence of chitin induction in vitro. These characteristics suggest their potential as biocontrol agents for fungal pathogens in tropical regions of the world. |
| Databáze: | OpenAIRE |
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