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Plant Physiology 80:834-837 (1986)
© 1986 American Society of Plant Biologists

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Articles

Activity of the Natural Algicide, Cyanobacterin, on Angiosperms 1

Florence K. Gleason and Deborah E. Case

Gray Freshwater Biological Institute, University of Minnesota, Navarre, Minnesota 55392

Cyanobacterin is a secondary metabolite produced by the cyanobacterium (blue-green alga) Scytonema hofmanni. The compound had previously been isolated and chemically characterized. It was shown to inhibit the growth of algae at a concentration of approximately 5 micromolar. Cyanobacterin also inhibited the growth of angiosperms, including the aquatic, Lemna, and terrestrial species such as corn and peas. In isolated pea chloroplasts, cyanobacterin inhibited the Hill reaction when p-benzoquinone, K3Fe(CN)6, dichlorophenolindophenol, or silicomolybdate were used as electron acceptors. The concentration needed to inhibit the Hill reaction in photosystem II was generally lower than the concentration of the known photosystem II inhibitor 3-(3,4-dichlorophenyl)-1,1-dimethyl urea. Cyanobacterin had no effect on electron transport in photosystem I. The data indicate that cyanobacterin inhibits O2 evolving photosynthetic electron transport in all plants and that the most probable site of action is in photosystem II.

1 Supported by the Minnesota Sea Grant College Program DOC/NA8 3AA-D-00056 R/NP-1. Research Contribution No. 184.




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E. Leu, A. Krieger-Liszkay, C. Goussias, and E. M. Gross
Polyphenolic Allelochemicals from the Aquatic Angiosperm Myriophyllum spicatum Inhibit Photosystem II
Plant Physiology, December 1, 2002; 130(4): 2011 - 2018.
[Abstract] [Full Text] [PDF]


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ASPB Publications PLANT PHYSIOLOGY THE PLANT CELL
Copyright © 1986 by the American Society of Plant Biologists