Phytochemistry p. 731 - 736 (1988)
Update date:2022-08-10
Topics:
Kakisawa, Hiroshi
Asari, Fumika
Kusumi, Takenori
Toma, Takeshi
Sakurai, Takemaro
et al.
An allelopathic substance was isolated from the methanol extract of the brown alga, Cladosiphon okamuranus.Extraction and purification of the active substance was monitored by bioassays against the conchospores of Porphyra yezoensis and Heterosigma akashiwo.The compound was identified as 6Z,9Z,12Z,15Z/octadecatetraenoic acid and its activity was then tested againts 36 species of microalgae.Many of eukaryotes tested were affected at 5 ppm, but prokaryotes were unaffected at 25 ppm.The tetraunsaturated fatty acid exterminated toxic red tide planktons such as Chattonella antiqua at 1 ppm concentration.Key Word Index-Cladosiphon okamuranus; Chordariaceae; brown alga; allelopathy; red tide; toxic phytoplankton; fatty acid; octadecatetraenoic acid.
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