The fine structure of the pollen wall inStrelitzia reginae (Musaceae) |
| |
Authors: | Michael Hesse Maria Waha |
| |
Affiliation: | 1. Institute für Botanik und Botanischer Garten, Universit?t Wien, Rennweg 14, A-1030, Wien, Austria
|
| |
Abstract: | The pollen wall ofStrelitzia reginae (Musaceae) consists of a nearly unsculptured, very thin, highly reduced, but coherent exine, and a thick intine (with an outer, channeled layer and an inner, largely homogeneous layer). After short, incomplete acetolysis the exine covers the remaining, severely shrinked protoplast as a folded, but unaltered “skin”, while the intine has totally disappeared. After extended acetolysis only the coherent, skin-like exine remains. Thus, the term “exine-less pollen” sometimes used for similar sporoderm structures in other genera ofZingiberales is misleading and should be substituted by the term “skin-like exine”. Surprisingly, the peculiar pollen wall ultrastructure ofStrelitzia and some otherZingiberales is very similar to that of some genera of theLaurales, an example for convergent evolution within the angiosperms. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|