Chemotypes of the Antarctic moss Bryum algens delineated by their flavonoid constituents

The flavonoid composition of Bryum algens from Antarctica is presented. It is shown that there exist two extreme patterns, with a range of intermediate forms. The patterns range from a flavonol dominant one, containing some flavone glycosides, through to a flavone dominant pattern essentially lacking flavonols. The close proximity of plants with different flavonoid profiles, and the presence of plants with intermediate patterns, suggest the existence of chemotypes within this species.

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