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Hydrobiologia

, Volume 543, Issue 1, pp 71–78 | Cite as

Anti-cyanobacterial fatty acids released from Myriophyllum spicatum

  • Satoshi NakaiEmail author
  • Shingo Yamada
  • Masaaki Hosomi
Primary Research Paper

Abstract

This study was carried out to identify unknown allelochemicals released from Myriophyllum spicatum and to investigate their anti-cyanobacterial effects. A series of analyses of culture solutions and methanol extracts of M. spicatum using gas chromatograph equipped with a mass selective detector revealed that M. spicatum released fatty acids, specifically, nonanoic, tetradecanoic, hexadecanoic, octadecanoic, and octadecenoic acids. Nonanoic, cis-6-octadecenoic, and cis-9-octadecenoic acids significantly inhibited growth of Microcystis aeruginosa, whereas tetradecanoic, hexadecanoic, and octadecanoic acids did not show any effect. When the inhibitory effect of nonanoic acid was compared with those of 4 polyphenols and eugeniin, which are anti-cyanobacterial compounds previously reported to be released by M. spicatum, nonanoic acid was found to be the most inhibitory to M. aeruginosa. These results indicate that not only polyphenols and eugeniin but also fatty acids such as nonanoic acid must be studied to reveal how M. spicatum exerts its allelopathic effect on M. aeruginosa.

Keywords

allelochemical fatty acid Microcystis aeruginosa Myriophyllum spicatum 

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Copyright information

© Springer 2005

Authors and Affiliations

  1. 1.Department of Chemical EngineeringTokyo University of Agriculture and TechnologyKoganeiJapan

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