Abstract
The phenolic compounds ofAzolla imbricata andA. japonica have been examined in the present study. Both species were found to contain luteolinidin 5-glucoside and several phenolic compounds, particularly chlorogenic acid, aesculetin, caffeic acid 3,4-diglucoside and 6-(3′-glucosylcaffeoyl)-aesculetin. In addition, glucose esters ofp-coumaric acid and glucose, 1,6-diester of caffeic and chlorogenic acids were present in a small amount. The acid- and alkali-hydrolyzates ofAzolla plants yielded caffeic acid and aesculetin present at the level of about 0.047% and 0.012% in fresh plants, and a large part of the caffeic acid seems to be present as the ester.
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Ishikura, N. 3-Desoxyanthocyanin and other phenolics in the water fernAzolla . Bot Mag Tokyo 95, 303–308 (1982). https://doi.org/10.1007/BF02488541
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DOI: https://doi.org/10.1007/BF02488541