Isolation and Structure Determination of Algicidal Compounds from Ulva fasciata

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概要

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• Thirty-seven species of seaweeds including 10 Chlorophyta, 13 Phaeophyta, and 14 Rhodophyta collected from the coast of Nagasaki Prefecture, Japan, were screened for algicidal activity against the red-tide phytoplankton Heterosigma akashiwo. The green alga Ulva fasciata (Ulvaceae, Chlorophyta) showed the strongest algicidal activity among the seaweeds tested. Bioassay-guided fractionation of the methanol extract of U. fasciata led to isolation of three algicidal compounds whose structures were determined to be hexadeca-4,7,10,13-tetraenoic acid (HDTA), octadeca-6,9,12,15-tetraenoic acid (ODTA), and α-linolenic acid on the basis of spectroscopic information. These polyunsaturated fatty acids (PUFAs) showed potent algicidal activity against H. akashiwo (LC50 1.35 μg/ml, 0.83 μg/ml, and 1.13 μg/ml for HDTA, ODTA, and α-linolenic acid, respectively), and the result demonstrated the potential of these PUFAs for practical harmful algal bloom control.

• 2005-11-23

著者

• ISHIBASHI Fumito

  Division of Marine Life Science and Biochemistry, Faculty of Fisheries, Nagasaki University

• FUJITA Yuji

  Graduate School of Science and Technology, Nagasaki University

• Alamsjah Mochammad

  Graduate School Of Sci. And Technol. Nagasaki Univ.

• Fujita Yuji

  Graduate School Of Sci. And Technol. Nagasaki Univ.

• Ishibashi Fumito

  Division Of Marine Life Science And Biochemistry Faculty Of Fisheries Nagasaki University

• Ishibashi Fumito

  Faculty Of Fisheries Nagasaki University

• HIRAO Shotaro

  Graduate School of Science and Technology, Nagasaki University

• Hirao Shotaro

  Graduate School Of Science And Technology Nagasaki University

関連論文

• Selective Toxic Effects of Polyunsaturated Fatty Acids Derived from Ulva fasciata on Red Tide Phyotoplankter Species
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