Annals of Botany 74: 483-491, 1994
© 1994 Annals of Botany Company
Investigation of the Presence of Phenolic Compounds in Monocotyledonous Cell Walls, using UV Fluorescence Microscopy
Jodrell Laboratory, Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3DS, UK
Harris and Hartley (1976, 1980) demonstrated the presence of ferulic acid in cell walls of certain monocotyledons using UV fluorescence microscopy (fluorescing green after treatment with ammonium hydroxide solution). The presence or absence of this type of fluorescence is apparently critical in higher level systematics of monocotyledons. In order to evaluate the significance of this character, cell wall fluorescence was investigated in a range of monocotyledon species, particularly the Australian Xanthorrhoeaceae sensu lato (Bedford et al., 1986), which were not investigated in earlier studies. This family is widely regarded as polyphyletic and was divided into several families by Dahlgren, Clifford and Yeo (1985). Some of its constituent genera, such as Dasypogon, Kingia and Calectasia, have been linked with both commelinoid and non-commelinoid monocotyledons, and are of obscure affinity. Some genera of Xanthorrhoeaceae sensu lato (Baxteria, Calectasia, Dasypogon and Kingia) show this type of green cell wall fluorescence and may therefore be more closely linked with the commelinoid monocotyledons, rather than the Lilianae-Asparagales, as previously placed (Dahlgren et al., 1985).Copyright 1994, 1999 Academic Press
Asparagales, Dasypogonaceae, fluorescence, Hanguana, monocotyledons, systematics, Xanthorrhoeaceae
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