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겨울철 담수내 유해조류 Stephanodiscus hantzschii 와 Peridinium bipes 의 살조세균의 분리 및 특성

Title
겨울철 담수내 유해조류 Stephanodiscus hantzschii 와 Peridinium bipes 의 살조세균의 분리 및 특성
Other Titles
Isolation, identification and characterization of algicidal bacteria against Stephanodiscus hantzschii and Peridinium bipes for the control of freshwater winter algal blooms
Author
강윤경
Alternative Author(s)
Kang, Yoon-Kyung
Advisor(s)
한명수
Issue Date
2007-08
Publisher
한양대학교
Degree
Master
Abstract
Five strains (HYY0510-SK04, HYY0511-SK09, HYK0512-SK12, HYK0512-PK04 and HYY0512-PK05) of algicidal bacteria against harmful blooming algae, diatom Stephanodiscus hantzschii and dinoflagellate Peridinium bipes, were isolated. Among these strains, HYY0510-SK04, HYY0511-SK09 and HYK0512-SK12 have an effective algicidal activity on S. hantzschii, while HYK0512-PK04 and HYY0512-PK05 have an algicidal effect against P. bipes. Sequence analysis of 16S rDNA showed that HYY0510-SK04 and HYY0511-SK09 were closely related to Acidovorax delafieldii ATCC 17505^(T). HYK0512-SK12, HYK0512-PK04 and HYY0512-PK05 showed high homology with Variovorax paradoxus IAM 12373^(T) (98.9%), Hydrogenophaga palleronii ATCC 49743^(T) (98.8%) and Pseudomonas plecoglossicida ATCC 700383^(T) (98.3%), respectively. HYY0510-SK04, HYY0511-SK09 and HYK0512-SK12 degraded S. hantzschii cells within two weeks when those bacteria were inoculated with densities of ≥10^(7)cells ml^(-1) to the lag or logarithmic growth phase of an algal culture. HYK0512-PK04 and HYY0512-PK05 degraded more than 90% of P. bipes cells within 14 and 8 days, respectively, when these bacteria were inoculated with densities of ≥10^(7)cells ml^(-1). Among the five bacterial strains, HYK0512-SK12 and HYY0512-PK05 showed the most effective growth inhibition of all the algae and cyanobacteria tested. Biochemical assays revealed that the main algicidal substance from all isolates were likely to be extracellular chemical-like substances. These results indicate that the bacterial strains isolated for this study are potential agents for the control of harmful algal blooms in eutrophic reservoirs.
URI
https://repository.hanyang.ac.kr/handle/20.500.11754/148590http://hanyang.dcollection.net/common/orgView/200000407016
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > ENVIRONMENTAL SCIENCE(환경과학과) > Theses (Master)
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