| Project/Area Number |
10460092
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Fisheries chemistry
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| Research Institution | THE UNIVERSITY OF TOKYO |
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Principal Investigator |
MURAKAMI Masahiro INSTITUTION, THE UNIVERSITY OF TOKYO ; DEPARTMENT, GRADUATE SCHOOL OF AGRICULTURAL LIFE SCIENCES ; TITLE OF POSITION, ASSOCIATE PROFESSOR, 大学院・農学生命科学研究科, 助教授 (70134517)
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| Co-Investigator(Kenkyū-buntansha) |
MITSUTANI Atsushi INSTITUTION, FUKUYAMA UNIVERSITY ; DEPARTMENT, FACULTY OF ENGINEERING ; TITLE OF POSITION, ASSOCIATE PROFESSOR, 工学部・海洋生物学科, 助教授 (80309632)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 1999: ¥3,500,000 (Direct Cost: ¥3,500,000)
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| Keywords | WATER-BLOOM / LYTIC BACTERIA / PROTEASE / PROTEASE INHIBITOR / CYANOBACTERIA / PEPTIDE |
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| Research Abstract |
A total of 212 heterotrophic bacterial strains were isolated from the colonies of the cyanobacteria Miocrocystis spp. collected at the Benkei Pond, Kyoto, Japan. These bacterial strains were assessed the productivity of extrace11ular protease. Although extrace11ular protease-active bacteria occupied around 50% of heterotrophic bacteria before the occurrence of the bloom of Microcytis (June) and the degradation period of the bloom (October), the proportion of them were lower, Iess then 20%, during the bloom of Microcystis (July, August and September). These results suggest the possibility that some protease inhibitors produced by Microcystis spp. actively growing in summer may inhibit the growth of extrace11ular protease-active bacteria living in the Microcystis colonies. Furthermore, sulfactin was isolated from the Bacillus SP., which was collected in the lake Kasumigaura at July, according to the antialgal activity.
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