NDLI: Thread-forming structures in angiosperm anthers: Their diverse role in pollination ecology

Content Provider	Springer Nature Link
Author	Hesse, M. Vogel, S. Halbritter, H.
Copyright Year	2000
Abstract	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.
Starting Page	281
Ending Page	292
Page Count	12
File Format	PDF
ISSN	03782697
Journal	Plant Systematics and Evolution
Volume Number	222
Issue Number	1-4
e-ISSN	16156110
Language	English
Publisher	Springer-Verlag
Publisher Date	2000-01-01
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Angiosperms Echium Esterhazya pollination ecology anthers pollen pollen presentation sporopollenin viscin threads Plant Ecology Plant Sciences Plant Anatomy/Development Plant Systematics/Taxonomy/Biogeography
Content Type	Text
Resource Type	Article
Subject	Plant Science Ecology, Evolution, Behavior and Systematics

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