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Original Articles

Morphologie und systematische Bedeutung des Pollens der Bromeliaceae

Pages 197-212 | Received 01 Feb 1991, Accepted 12 Dec 1991, Published online: 01 Sep 2009
 

Abstract

Der Pollen von 338 Arten aus 31 Gattungen der Familie der Bromeliaceae wurde untersucht und mit der systematischen Stellung der Arten in Verbindung gebracht. Der überwiegende Teil der Bromeliaceen besitzt sulcaten, ein kleinerer Teil poraten oder inaperturaten Pollen mit reticulater, foveolater oder glatter Oberfläche. Die Form und Ausbildung des Sulcus — es lassen sich 6 verschiedene Typen unterscheiden — kann in manchen Fällen als systematisches Merkmal dienen. Insgesamt spiegelt die Pollenmorphologie die Verwandtschaftsbeziehungen in der Familie wider. Gut abgegrenzte Sippen sind auch pollenmorphologisch einheitlich, umgekehrt sind systematisch problematische Sippen auch im Pollenbau heterogen.

The pollen morphology of 31 genera (338 species) of the Bromeliaceae was investigated. The pollen grains are mostly reticulate, but also foveolate or rarely smooth. 3 main aperture types occur: porate pollen (restricted to subfamily Bromelioideae), inaperturate pollen, and (predominantly) sulcate pollen. In taxa with sulcate pollen, six different furrow types can be distinguished. Although there are overlaps between sulcus types, there are often conspicuous correlations with taxonomic groups. The pollen morphology in general reflects the systematic situation within the family. In well circumscribed taxa the pollen morphology shows little variability. On the other hand, the heterogenous taxa exhibit much pollen diversity.

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