Journal of Agriculture & Life Sciences

Mode of Algicidal Action and Microscopic Observations of Algicidal Process
Seong-Yun Jeong

Abstract
A total of 130 bacterial isolates were isolated for this study. Three isolates showed algicidal activity against A. catenella, C. marina, and C. polykrikoides. Isolate DC-11 showed algicidal activity (95%) against A. catenella. Isolate DC-43 exhibited the strongest algicidal activity (98%) against A. catenella. Isolate DC-43 showed strong algicidal activity (93%) against C. polykrikoides. Isolate DC-49 exhibited the strongest algicidal activity (97%) against C. marina. The results using commercially available tissue culture inserts revealed that Arthrobacter sp. DC-11, Brachybacterium sp. DC-43, and Bacillus sp. DC-49 killed HAB species through algicide release, as an indirect attacker. The algicidal effects of three isolates against three algal cells were observed under light microscope during the algicidal process.

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