Antifungal efficacy of bacteria isolated from marine sedentary organisms.
The antibiotic-producing ability of 57 bacteria isolated from 8 marine sedentary organisms, 6 sponges (Spirastrella sp., Phyllospongia sp., Ircinia sp., Aaptos sp., Azorica sp., Axinella sp.), 1 soft coral (Lobophytum sp.) and 1 alga (Sargassum sp.), was evaluated against 6 phytopathogenic fungi (Helminthosporium oryzae, Rhizoctonium solani, Pyricularia oryzae, Fusarium oxysporum, Aspergillus oryzae and A. fumigatus). Bacteria of the genus Bacillus (20%), Pseudomonas (33%) and Flavobacterium (40%) were predominant among the heterotrophic bacteria isolated from the marine sponges, soft coral and alga, respectively. Bioassay results revealed that 36 (63%) bacterial isolates displayed antifungal activity against at least one fungus, the alga (Sargassum sp.) being the source of highest number (80%) of producer strains. Twelve bacterial isolates inhibited all fungi. The MIC of the organic extracts of 12 bacteria ranged from 0.3 to 22.8 mg/L.
Mohapatra
B R
BR
Forest and Marine Products Division, Regional Research Laboratory CSIR, Bhubaneswar 751 013, Orissa, India.
Bapuji
M
M
Sree
A
A
D000348:Aflatoxins / Q000096:biosynthesis; D000818:Animals; D037421:Anthozoa / Q000382:microbiology*; D000898:Antibiosis; D000935:Antifungal Agents / Q000378:metabolism / Q000494:pharmacology*; D001419:Bacteria / Q000145:classification / Q000302:isolation & purification / Q000378:metabolism*; D056890:Eukaryota / Q000382:microbiology*; D005658:Fungi / Q000187:drug effects* / Q000378:metabolism; D007194:India; D008826:Microbial Sensitivity Tests; D012275:Oryza / Q000382:microbiology; D010935:Plant Diseases / Q000382:microbiology; D011161:Porifera / Q000382:microbiology*; D012623:Seawater / Q000382:microbiology
D000348:Aflatoxins; D000935:Antifungal Agents