Identification and characterization of chitinolytic bacteria isolated from a freshwater lake.
Biosci Biotechnol Biochem
; 82(2): 343-355, 2018 Feb.
Article
en En
| MEDLINE
| ID: mdl-29327645
ABSTRACT
To develop a novel type of biocontrol agent, we focus on bacteria that are characterized by both chitinase activity and biofilm development. Chitinolytic bacteria were isolated from sediments and chitin flakes immersed in the water of a sand dune lake, Sakata, in Niigata, Japan. Thirty-one isolates from more than 5100 isolated strains were examined chitinase activity and biofilm formation. Phylogenetic analysis of these isolates based on the 16S rRNA gene sequences revealed that most isolates belonged to the family Aeromonadaceae, followed by Paenibacillaceae, Enterobacteriaceae, and Neisseriaceae. The specific activity of chitinase of four selected strains was higher than that of a reference strain. The molecular size of one chitinase produced by Andreprevotia was greater than that of typical bacterial chitinases. The dialyzed culture supernatant containing chitinases of the four strains suppressed hyphal growth of Trichoderma reesei. These results indicate that these four strains are good candidates for biocontrol agents.
Palabras clave
AA10: auxiliary activities family 10; Bacteria; DDBJ: the DNA Data Bank of Japan; GHs: glycoside hydrolases; GlcNAc: N-acetyl-D-glucosamine; LB medium: Luria-Bertani medium; PDA: potato dextrose agar; SDSPAGE: sodium dodecyl sulfatepolyacrylamide gel electrophoresis; YEM medium: yeast extract-supplemented minimal medium; antifungal activity; biocontrol agent; biofilm; chitinase
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Bacterias
/
Lagos
/
Quitina
Tipo de estudio:
Diagnostic_studies
Idioma:
En
Revista:
Biosci Biotechnol Biochem
Asunto de la revista:
BIOQUIMICA
/
BIOTECNOLOGIA
Año:
2018
Tipo del documento:
Article
País de afiliación:
Japón