Elsevier

Phytochemistry

Volume 41, Issue 1, January 1996, Pages 133-138
Phytochemistry

Ecological biochemistry
Release and ecological impact of algicidal hydrolysable polyphenols in Myriophyllum spicatum

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Abstract

Aqueous acetone extracts of shoots of Eurasian watermilfoil (Myriophyllum spicatum) exhibit a strong inhibitory action against various coccoid and filamentous cyanobacteria and to a slightly less extent against chlorophytes and diatoms. Bioassay-directed fractionation led to the isolation of a hydrolysable polyphenol, tellimagrandin II, which turned out to be the main inhibitory substance. Myriophyllum spicatum contains large amounts of this compound (1.5% of dry wt). Part of the inhibitory activity is due to complexation and inactivation of algal extracellular enzymes (e.g. alkaline phosphatase) by hydrolysable polyphenols from M. spicatum.

Keywords

Myriophyllum spicatum
Haloragaceae
Eurasian watermilfoil
submerged macrophyte
plant defences
algicidal activity
allelopathy
hydrolysable polyphenol
tellimagrandin II
eugeniin

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Present address: Section of Ecology and systematics, Cornell University, Corson Hall, Ithaca, NY 14850-2701, U.S.A.