spacer gif spacer gif spacer gif spacer gif ARCHIVE ANNOUNCEMENT! spacer gif
QUICK SEARCH:   [advanced]


spacer gif
     Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents    

First published online 24 January 2007
doi: 10.1242/dev.02774

Development 134, 1045-1050 (2007)
Published by The Company of Biologists 2007
This Article
Right arrow Figures Only
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Supplementary Material
Right arrow All Versions of this Article:
dev.02774v1
134/6/1045    most recent
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 Related articles in Development
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 Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Peaucelle, A.
Right arrow Articles by Laufs, P.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Peaucelle, A.
Right arrow Articles by Laufs, P.

Research Report

Plants expressing a miR164-resistant CUC2 gene reveal the importance of post-meristematic maintenance of phyllotaxy in Arabidopsis

Alexis Peaucelle, Halima Morin, Jan Traas and Patrick Laufs*

Laboratoire de Biologie Cellulaire UR501, Institut J. P. Bourgin, INRA, F-78000 Versailles, France.

* Author for correspondence (e-mail: laufs{at}versailles.inra.fr)

Accepted 5 December 2006

SUMMARY

In plants, the arrangement of organs along the stem (phyllotaxy) follows a predictable pattern. Recent studies have shown that primordium position at the meristem is governed by local auxin gradients, but little is known about the subsequent events leading to the phyllotaxy along the mature stem. We show here that plants expressing a miR164-resistant CUP-SHAPED COTYLEDON2 (CUC2) gene have an abnormal phyllotactic pattern in the fully grown stem, despite the pattern of organ initiation by the meristem being normal. This implies that abnormal phyllotaxy is generated during stem growth. These plants ectopically express CUC2 in the stem, suggesting that the proper timing of CUC2 expression is required to maintain the pattern initiated in the meristem. Furthermore, by carefully comparing the phyllotaxy in the meristem and along the mature inflorescence in wild types, we show that such deviation also occurs during wild-type development, although to a smaller extent. We therefore suggest that the phyllotactic pattern in a fully grown stem results not only from the organogenetic activity of the meristem, but also from the subsequent growth pattern during stem development.

Key words: Phyllotaxy, CUP-SHAPED COTYLEDON, Boundary domain, Internode, miRNA, Arabidopsis


Related articles in Development:

Phyllotactic patterning: microRNAs made redundant?

Development 2007 134: e601. [Full Text]  



This article has been cited by other articles:


Home page
 Plant CellHome page
L. Ragni, E. Belles-Boix, M. Gunl, and V. Pautot
Interaction of KNAT6 and KNAT2 with BREVIPEDICELLUS and PENNYWISE in Arabidopsis Inflorescences
PLANT CELL, April 1, 2008; 20(4): 888 - 900.
[Abstract] [Full Text] [PDF]


© The Company of Biologists Ltd 2007