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Biological and chemical characterization of antimicrobial activity in Arthrobacter spp. isolated from disease-suppressive compost.
- Source :
-
Journal of basic microbiology [J Basic Microbiol] 2021 Aug; Vol. 61 (8), pp. 745-756. Date of Electronic Publication: 2021 Jul 06. - Publication Year :
- 2021
-
Abstract
- Antagonistic bacteria can act as biocontrol agents against various phytopathogens. Recently, Arthrobacter spp. demonstrated antifungal activity, but were not further characterized. In this study, the antimicrobial activity of Arthrobacter humicola strains M9-1A, M9-2, and M9-8, and Arthrobacter psychrophenolicus strain M9-17 were evaluated against nine plant pathogens in vitro, and their cell-free filtrates were additionally assessed for inhibition of Alternaria alternata and suppression of black mold disease on tomato fruit. Results indicated that A. humicola M9-1A and A. psychrophenolicus M9-17 were the most inhibitory, reducing growth of seven of the pathogens studied. Cell-free filtrates of A. psychrophenolicus M9-17 reduced the growth of most pathogens. All cell-free bacterial filtrates, except those from A. humicola M9-2, suppressed black mold on tomato fruit. Disk diffusion assays with ethyl acetate soluble culture filtrate extracts of all bacteria reduced the mycelial growth of A. alternata. Clear inhibition zones were observed for A. psychrophenolicus M9-17 extracts using drop bioassays. The antifungal compound N-acetyltryptamine was purified and characterized from the A. psychrophenolicus M9-17 cell-free ethyl acetate soluble extract. This study suggests that antibiosis may play a key role in the antimicrobial activity of Arthrobacter spp.<br /> (© 2021 Wiley-VCH GmbH.)
- Subjects :
- Alternaria drug effects
Antibiosis drug effects
Antifungal Agents chemistry
Antifungal Agents pharmacology
Fruit microbiology
Solanum lycopersicum microbiology
Micrococcaceae
Plant Diseases microbiology
Anti-Infective Agents chemistry
Anti-Infective Agents pharmacology
Arthrobacter isolation & purification
Arthrobacter metabolism
Composting
Subjects
Details
- Language :
- English
- ISSN :
- 1521-4028
- Volume :
- 61
- Issue :
- 8
- Database :
- MEDLINE
- Journal :
- Journal of basic microbiology
- Publication Type :
- Academic Journal
- Accession number :
- 34228381
- Full Text :
- https://doi.org/10.1002/jobm.202100213