Phytochemical and morphological support for the existence of two species inMonoclea (Hepaticae) |
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| Authors: | S R Gradstein R Klein L Kraut R Mues J Spörle H Becker |
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| Institution: | (1) Institute of Systematic Botany, Heidelberglaan 2, 3584CS Utrecht, The Netherlands;(2) Botanik, Universität des Saarlandes, Fachrichtung 13.1, D-6600 Saarbrücken, Federal Republic of Germany;(3) Institut für Pharmakognosie und Analytische Phytochemie, Universität des Saarlandes, Fachr. 12.3, D-6600 Saarbrücken, Germany |
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| Abstract: | Recognition of two different species in the liverwort genusMonoclea
Hook. (monotypic orderMonocleales), viz.M. forsteri
Hook. in New Zealand andM. gottschei
Lindb. in the New World, is supported by characteristics of the sporophyte, antheridial receptacle and secondary metabolites.M. gottschei produces the greatest variety of flavonoids and the largest amount of bisbibenzyls ever encountered in a liverwort. In contrast,M. forsteri is poor in secondary metabolites. Two allopatric subspecies are recognized inM. gottschei, based on characteristics of the antheridial receptacle: subsp.gottschei in Chile (Valdivian region, Juan Fernandez Is.) and subsp.elongata
Gradst. & Mues, subsp. nova, in tropical America. The exclusive occurrence inMonoclea of glucuronide and galacturonide flavone glycosides and the fact that capsule dehiscence may take place before full elongation of the seta are new arguments in support of the placement ofMonocleales in theMarchantiidae.
Publication Nr. 43 of the  Arbeitskreis Chemie und Biologie der Moose , Universität des Saarlandes, Saarbrücken. This paper is dedicated to DrElla O. Campbell, Massey University, Department of Botany and Zoology, New Zealand on the occasion of her 80th birthday. |
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| Keywords: | Hepaticae Monocleales Monoclea Chemotaxonomy flavonoids bisbibenzyls terpenoids morphology sporophyte antheridial receptacle geographical variation |
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