scholarly journals Nuclear import of the transcription factor SHOOT MERISTEMLESS depends on heterodimerization with BLH proteins expressed in discrete sub-domains of the shoot apical meristem of Arabidopsis thaliana

2006 ◽  
Vol 34 (4) ◽  
pp. 1281-1292 ◽  
Author(s):  
M. Cole
Keyword(s):  
Arabidopsis Thaliana ◽  
Transcription Factor ◽  
Nuclear Import ◽  
Shoot Apical Meristem ◽  
Apical Meristem ◽  
Shoot Meristemless

Formation of the shoot apical meristem in Arabidopsis thaliana: an analysis of development in the wild type and in the shoot meristemless mutant

Development ◽  
1993 ◽  
Vol 119 (3) ◽  
pp. 823-831 ◽  
Author(s):  
M. K. Barton ◽  
R. S. Poethig
Keyword(s):  
Tissue Culture ◽  
Arabidopsis Thaliana ◽  
Embryo Development ◽  
Shoot Apical Meristem ◽  
Apical Meristem ◽  
Adventitious Shoot ◽  
Shoot Meristem ◽  
Wild Type ◽  
In The Wild ◽  
Shoot Meristemless

The primary shoot apical meristem of Arabidopsis is initiated late in embryogenesis, after the initiation of the cotyledons. We have identified a gene, called SHOOT MERISTEMLESS, which is critical for this process. shoot meristemless mutant seedlings lack a shoot apical meristem but are otherwise healthy and viable. The anatomy of mutant embryos demonstrates that the shoot meristemless-1 mutation completely blocks the initiation of the shoot apical meristem, but has no other obvious effects on embryo development. The failure of shoot meristemless tissue to regenerate shoots in tissue culture suggests that this gene regulates adventitious shoot meristem formation, as well as embryonic shoot meristem formation.

Characterisation of three shoot apical meristem mutants of Arabidopsis thaliana

Development ◽  
1992 ◽  
Vol 116 (2) ◽  
pp. 397-403 ◽  
Author(s):  
H. M. Ottoline Leyser ◽  
I. J. Furner
Keyword(s):  
Arabidopsis Thaliana ◽  
Root Growth ◽  
Shoot Apical Meristem ◽  
Apical Meristem ◽  
Floral Development ◽  
Wild Type ◽  
Recessive Mutations ◽  
Phenotypic Characterisation ◽  
Dicotyledonous Plants ◽  
And Function

The shoot apical meristem of dicotyledonous plants is highly regulated both structurally and functionally, but little is known about the mechanisms involved in this regulation. Here we describe the genetic and phenotypic characterisation of recessive mutations at three loci of Arabidopsis thaliana in which meristem structure and function are disrupted. The loci are Clavata1 (Clv1), Fasciata1 (Fas1) and Fasciata2 (Fas2). Plants mutant at these loci are fasciated having broad, flat stems and disrupted phyllotaxy. In all cases, the fasciations are associated with shoot apical meristem enlargement and altered floral development. While all the mutants share some phenotypic features they can be divided into two classes. The pleiotropic fas1 and fas2 mutants are unable to initiate wild- type organs, show major alterations in meristem structure and have reduced root growth. In contrast, clv1 mutant plants show near wild-type organ phenotypes, more subtle changes in shoot apical meristem structure and wild-type root growth.

Combined SHOOT MERISTEMLESS and WUSCHEL trigger ectopic organogenesis inArabidopsis

Development ◽  
2002 ◽  
Vol 129 (13) ◽  
pp. 3207-3217 ◽  
Author(s):  
Jean-Luc Gallois ◽  
Claire Woodward ◽  
G. Venugopala Reddy ◽  
Robert Sablowski
Keyword(s):  
Stem Cells ◽  
Cell Division ◽  
Shoot Apical Meristem ◽  
Apical Meristem ◽  
Aerial Parts ◽  
Undifferentiated Cells ◽  
Activate Cell ◽  
Almost All ◽  
Differentiation Pathways ◽  
Shoot Meristemless

Almost all aerial parts of plants are continuously generated at the shoot apical meristem (SAM). To maintain a steady pool of undifferentiated cells in the SAM while continuously generating new organs, it is necessary to balance the rate of cell division with the rate of entrance into differentiation pathways. In the Arabidopsis meristem, SHOOT MERISTEMLESS (STM) and WUSCHEL (WUS) are necessary to keep cells undifferentiated and dividing. Here, we tested whether ectopic STM and WUS functions are sufficient to revert differentiation and activate cell division in differentiating tissues. Ectopic STM and WUS functions interacted non-additively and activated a subset of meristem functions, including cell division, CLAVATA1 expression and organogenesis, but not correct phyllotaxy or meristem self-maintenance. Our results suggest that WUS produces a non-cell autonomous signal that activates cell division in combination with STM and that combined WUS/STM functions can initiate the progression from stem cells to organ initiation.

scholarly journals Model of structuring the stem cell niche in shoot apical meristem of Arabidopsis thaliana

2013 ◽  
Vol 452 (1) ◽  
pp. 316-319 ◽  
Author(s):  
S. V. Nikolaev ◽  
U. S. Zubairova ◽  
A. V. Penenko ◽  
E. D. Mjolsness ◽  
B. E. Shapiro ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Stem Cell ◽  
Shoot Apical Meristem ◽  
Stem Cell Niche ◽  
Apical Meristem ◽  
Cell Niche

scholarly journals HANABA TARANU Is a GATA Transcription Factor That Regulates Shoot Apical Meristem and Flower Development in Arabidopsis

2004 ◽  
Vol 16 (10) ◽  
pp. 2586-2600 ◽  
Author(s):  
Yuanxiang Zhao ◽  
Leonard Medrano ◽  
Kazuaki Ohashi ◽  
Jennifer C. Fletcher ◽  
Hao Yu ◽  
...  
Keyword(s):  
Transcription Factor ◽  
Flower Development ◽  
Shoot Apical Meristem ◽  
Apical Meristem ◽  
Gata Transcription Factor
Sign in / Sign up

Export Citation Format

Share Document