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Detection of microcystins from cyanobacterial water blooms in Thailand fresh water
Author(s) -
Mahakhant Aparat,
Sano Tomoharu,
Ratanachot Pannarat,
Tongaram Taksawan,
Srivastava Vishal C.,
Watanabe Makoto M.,
Kaya Kunimitsu
Publication year - 1998
Publication title -
phycological research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.438
H-Index - 44
eISSN - 1440-1835
pISSN - 1322-0829
DOI - 10.1046/j.1440-1835.1998.00119.x
Subject(s) - microcystin , microcystis , biology , algal bloom , microcystis aeruginosa , cyanobacteria , environmental chemistry , ecology , bacteria , nutrient , phytoplankton , chemistry , genetics
SUMMARY Microcystin content and composition in water blooms collected from two reservoirs and a pond in Thailand were investigated. The dominant species in the water blooms were Microcystis aeruginosa Pleurocapsalean filamentous cyanobacterium. The water blooms contained 0.7–0.8 mg microcystin/g dried sample. This is the first identification of microcystin from Pleurocapsalean filamentous cyanobacterium. The major microcystins in the water blooms were microcystin ‐RR, ‐LR and their (Z) forms as geometrical isomers. Microcystin ‐YR, ‐LA, ‐ThtyrR and ‐AR were also detected as minor variants. A novel variant, L‐2‐amino‐ N ‐butyric acid‐containing microcystin (microcystin ‐lBu), was identified from water blooms in a pond in Bangkok.