ibclogo XVI International Botanical Congess

Abstract Number: 3754
Poster No. = 1065


ULTRAVIOLET PATTERNS IN ANGIOSPERM FLOWERS: SYSTEMATIC AND ECOLOGICAL ASPECTS


Nadja Biedinger* & Wilhelm Barthlott# , *Botanisches Institut der Universität Rostock, Wismarsche Straße 8, 18057 Rostock, Germany. e-mail: stefan.porembski@biologie.uni-rostock.de #Botanisches Institut der Universität Bonn, Meckenheimer Allee 170, 53115 Bonn, Germany. e-mail: barthlott@uni-bonn.de


UV reflexion of flowers of more than 8500 angiosperm species out of 300 families was studied by using an electronic light-converter, that made a direct observation possible. The results were analysed under systematical and ecological aspects. The majority of all flowers absorbs UV light. 38% of the flowers reflect UV, 20% of the angiosperm flowers - mostly advanced, insect-pollinated taxa - have UV patterns. UV reflection can be correlated to other aspects of pollination ecology. A systematic analysis shows trends for higher taxonomic categories (i.e. genera, families) concerning UV absorption, reflexion and patterns.

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