Skip Navigation



AOBPreview published online on November 18, 2005
Annals of Botany, doi:10.1093/aob/mcj022
This Article
Right arrow FREE Full Text (PDF) Freely available
Right arrow All Versions of this Article:
97/2/239    most recent
mcj022v1
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by ANGER, E. M.
Right arrow Articles by WEBER, M.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by ANGER, E. M.
Right arrow Articles by WEBER, M.
Agricola
Right arrow Articles by ANGER, E. M.
Right arrow Articles by WEBER, M.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© The Author 2005. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org
Received July 29, 2005
Revised August 31, 2005
Accepted October 11, 2005

Article

Pollen-wall Formation in Arum alpinum

ELISABETH M. ANGER 1 * and MARTINA WEBER 1

1 Department of Palynology and Structural Botany, Institute of Botany, University of Vienna, Rennweg 14, A-1030 Vienna, Austria

* To whom correspondence should be addressed.
ELISABETH M. ANGER, E-mail: martina.weber{at}univie.ac.at


  Abstract

• Background and Aims Arum alpinum has a quite uncommon pollen wall. A sporopolleninous ektexine is missing. The outermost pollen wall layer is formed by the endexine which is covered by polysaccharidic ornamentation elements. An ontogenetical investigation was accomplished to clarify pollen-wall development, with special reference to callose and pollen-wall development.

• Methods Plants of Arum alpinum grown in their natural habitat were collected once a week within the vegetative period and processed for semi- and ultra-thin sectioning.

• Key Results At any stage of pollen-wall formation callose is missing. Microspores are released from the tetrad by invagination of the amoeboid tapetum. The polysaccharidic wall ornamentations are formed by the tapetum.

• Conclusions There appears to be no truth in the dogma that callose is essential for microspore separation and release from the tetrad. The lack of callose does not influence fertility but could be the reason for the uncommon pollen wall, where a sporopolleninous ektexine is missing.

Keywords: Araceae, Arum alpinum, callose, pollen, spines, tapetum.
Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 J Exp BotHome page
Y. Ito-Inaba, M. Sato, H. Masuko, Y. Hida, K. Toyooka, M. Watanabe, and T. Inaba
Developmental changes and organelle biogenesis in the reproductive organs of thermogenic skunk cabbage (Symplocarpus renifolius)
J. Exp. Bot., September 1, 2009; 60(13): 3909 - 3922.
[Abstract] [Full Text] [PDF]


Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.