HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Submit a response Alert me when this article is cited Alert me when eLetters are posted Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (8) Citing Articles via Google Scholar Google Scholar Articles by Weigend, M. Articles by Müller, A. A. Search for Related Content PubMed PubMed Citation Articles by Weigend, M. Articles by Müller, A. A. Agricola Articles by Weigend, M. Articles by Müller, A. A.

Phytochemistry and the systematics and ecology of Loasaceae and Gronoviaceae (Loasales)¹

² Institute of Systematic Botany, Ludwig Maximilians University, Menzinger Strasse 67, 80638 Munich, Germany; ³ Institute of Pharmacy, Department of Pharmaceutical Biology, Ludwig Maximilians University, Butenandtstrasse 5-13, Haus B, D-81377 Munich, Germany

ABSTRACT

A screening for iridoid compounds of 78 of 315 species from all major groups in Gronoviaceae and Loasaceae has been carried out. The results were compared to the systematic concepts in the family and distribution and ecology of the taxa. Iridoids are present in at least some species of all genera screened. Some simple, monomeric compounds (e.g., loganin, sweroside) are found in all major groups of the two families and represent the basic iridoid inventory. Other compounds are restricted to certain taxonomic groups: nine-carbon iridoids (e.g., deutzioside) are restricted to Mentzelia (Loasaceae subfam. Mentzelioideae), hetero-oligomeric iridoids (e.g., tricoloroside methyl ester, acerifolioside) are restricted to two small groups in Loasa (Loasa ser. Macrospermae and ser. Floribundae, Loasaceae subfam. Loasoideae), and oleosides (e.g., 10-hydroxyoleoside dimethyl ester) are restricted to the large genus Caiophora sensu Weigend). The distribution of certain iridoid compounds thus confirms some of the generic limits. Iridoid phytochemistry does not correlate with systematic entities above the generic level nor does it in any way correlate with the morphological evolution of taxa. Conversely, the amount and complexity of iridoid compounds present in taxa correlate positively with the aridity of their habitat and the extent of mammalian herbivore pressure.

Key Words: generic delimitation • Gronoviaceae • herbivory • iridoids • Loasaceae • oleosides • phytochemistry

This article has been cited by other articles:

				L. Hufford, M. M. McMahon, A. M. Sherwood, G. Reeves, and M. W. Chase The major clades of Loasaceae: phylogenetic analysis using the plastid matK and trnL-trnF regions Am. J. Botany, August 1, 2003; 90(8): 1215 - 1228. [Abstract] [Full Text] [PDF]