Change search
ReferencesLink to record
Permanent link

Direct link
Connective structures between tapetal cells and spores in Lycophyta and pollen grains in angiosperms - A review
Stockholm University, Faculty of Science, Department of Botany.
2009 (English)In: Review of Palaeobotany and Palynology, ISSN 0034-6667, Vol. 156, no 1-2, 157-164 p.Article in journal (Refereed) Published
Abstract [en]

This article is a review of research and accumulated information about connective structures between, respectively, microspores in the locular space in anthers of angiospermis and the spores in the megasporangia of Lycophyta, as well as a comparison between these structures. The most extraordinary conclusion, if our interpretations of the results are correct, is that the reason for the great number of exine components and the great complexity of the micro- and mega-spore walls is that each exine unit structure acts as a plasmodesma and that each spore unit directs a wick-component to the cytoplasm. Pollen grains and spores that are literally covered by plasmodesmata or plasmodesmatal equivalents may be expected to grow and develop rapidly. These connections are believed to be routes of transport for substances between tapetal cells and the plasma membrane and cytoplasm in both pollen grains and spores. In Selaginella, "wicks" which are plasmodesmata equivalents extend from tapetal cells to exospore units and further to plasma membrane and megaspore cytoplasm. In angiosperm pollen grains plasmodesmata equivalents extend from the tapetum into and through exine and into the cytoplasm passing through the core of exine units (tufts), but in spores (e.g., Selaginella) the strand-like wicks traverse the space between the components of the exospore and the megaspore cytoplasm. These structures were successfully fixed with ruthenium red and Alcian blue, which tend to stabilize polysaccharides and glycoprotein as well as contrasting the components of the exine and exospore transfer systems.

Place, publisher, year, edition, pages
AMSTERDAM, NETHERLANDS: ELSEVIER SCIENCE BV , 2009. Vol. 156, no 1-2, 157-164 p.
Keyword [en]
URN: urn:nbn:se:su:diva-36267DOI: 10.1016/j.revpalbo.2009.01.006ISI: 000267570500015OAI: diva2:289117
Available from: 2010-01-22 Created: 2010-01-22 Last updated: 2010-01-22

Open Access in DiVA

No full text

Other links

Publisher's full text
By organisation
Department of Botany
In the same journal
Review of Palaeobotany and Palynology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 18 hits
ReferencesLink to record
Permanent link

Direct link