caa a22 4500 475806905 CHVBK 20180406123749.0 cr unu---uuuuu 170329e20000301xx s 000 0 eng 10.1007/BF00984107 doi (NATIONALLICENCE)springer-10.1007/BF00984107 Thread-forming structures in angiosperm anthers: Their diverse role in pollination ecology [Elektronische Daten] [M. Hesse, S. Vogel, H. Halbritter] This paper reviews the origin, nature, systematic distribution, and the respective function of the highly variable and diverse thread-forming structures in angiosperm anthers (including somewhat similar, rare features in ferns and gymnosperms). On one hand, such threads may function as pollen-connecting vectors in forming pollen dispersal units, as sporopollenin threads (viscin threads), e.g. in Onagraceae, or sporopollenin-less threads in surprisingly many other angiosperm families. On the other hand, as is known from theImpatiens — "pollen basket”, threads or ropes may be involved in pollen presentation. In addition, for the first time two new examples of "pollen baskets” in Boraginaceae and Scrophulariaceae are reported. InEchium the basket is formed by cellular elements from the modified septal regions, whereas inEsterhazya a similar effect is achieved in an analogous manner by trichomes of the epidermal layer of the thecal wall. There is obviously a different function of these seemingly very similar baskets: inEchium the feature acts preferably as a pollen presentation agent, whereas inEsterhazya the primary function is to prevent all the pollen from being dispersed too soon. Springer-Verlag, 2000 Angiosperms nationallicence Echium nationallicence Esterhazya nationallicence pollination ecology nationallicence anthers nationallicence pollen nationallicence secondary pollen presentation nationallicence sporopollenin nationallicence viscin threads nationallicence Hesse M. Institute of Botany and Botanical Garden, University of Vienna, Rennweg 14, A-1030, Wien, Austria aut Vogel S. Institute of Botany and Botanical Garden, University of Vienna, Rennweg 14, A-1030, Wien, Austria aut Halbritter H. Institute of Botany and Botanical Garden, University of Vienna, Rennweg 14, A-1030, Wien, Austria aut Plant Systematics and Evolution Springer-Verlag 222/1-4(2000-03-01), 281-292 0378-2697 222:1-4<281 2000 222 606 https://doi.org/10.1007/BF00984107 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00984107 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hesse M. Institute of Botany and Botanical Garden, University of Vienna, Rennweg 14, A-1030, Wien, Austria aut NATIONALLICENCE 700 1- Vogel S. Institute of Botany and Botanical Garden, University of Vienna, Rennweg 14, A-1030, Wien, Austria aut NATIONALLICENCE 700 1- Halbritter H. Institute of Botany and Botanical Garden, University of Vienna, Rennweg 14, A-1030, Wien, Austria aut NATIONALLICENCE 773 0- Plant Systematics and Evolution Springer-Verlag 222/1-4(2000-03-01), 281-292 0378-2697 222:1-4<281 2000 222 606 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer