scholarly journals Nitrate acts at the Arabidopsis thaliana shoot apical meristem to regulate flowering time

2019 ◽  
Vol 223 (2) ◽  
pp. 814-827 ◽  
Author(s):  
Justyna Jadwiga Olas ◽  
Judith Van Dingenen ◽  
Christin Abel ◽  
Magdalena Anna Działo ◽  
Regina Feil ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Flowering Time ◽  
Shoot Apical Meristem ◽  
Apical Meristem

scholarly journals PHOSPHORYLETHANOLAMINE CYTIDYLYLTRANSFERASE 1 modulates flowering in a florigen-independent manner by regulating SVP

Development ◽  
2020 ◽  
Vol 148 (1) ◽  
pp. dev193870
Author(s):  
Hendry Susila ◽  
Zeeshan Nasim ◽  
Katarzyna Gawarecka ◽  
Ji-Yul Jung ◽  
Suhyun Jin ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Flowering Time ◽  
Shoot Apical Meristem ◽  
Apical Meristem ◽  
Artificial Microrna ◽  
Flowering Locus T ◽  
Independent Manner ◽  
Vegetative Phase ◽  
Twin Sister ◽  
Short Vegetative Phase

ABSTRACTPHOSPHORYLETHANOLAMINE CYTIDYLYLTRANSFERASE 1 (PECT1) regulates phosphatidylethanolamine biosynthesis and controls the phosphatidylethanolamine:phosphatidylcholine ratio in Arabidopsis thaliana. Previous studies have suggested that PECT1 regulates flowering time by modulating the interaction between phosphatidylcholine and FLOWERING LOCUS T (FT), a florigen, in the shoot apical meristem (SAM). Here, we show that knockdown of PECT1 by artificial microRNA in the SAM (pFD::amiR-PECT1) accelerated flowering under inductive and even non-inductive conditions, in which FT transcription is almost absent, and in ft-10 twin sister of ft-1 double mutants under both conditions. Transcriptome analyses suggested that PECT1 affects flowering by regulating SHORT VEGETATIVE PHASE (SVP) and GIBBERELLIN 20 OXIDASE 2 (GA20ox2). SVP misexpression in the SAM suppressed the early flowering of pFD::amiR-PECT1 plants. pFD::amiR-PECT1 plants showed increased gibberellin (GA) levels in the SAM, concomitant with the reduction of REPRESSOR OF GA1-3 levels. Consistent with this, GA treatment had little effect on flowering time of pFD::amiR-PECT1 plants and the GA antagonist paclobutrazol strongly affected flowering in these plants. Together, these results suggest that PECT1 also regulates flowering time through a florigen-independent pathway, modulating SVP expression and thus regulating GA production.

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.

Establishment of the embryonic shoot apical meristem in Arabidopsis thaliana

2010 ◽  
Vol 124 (2) ◽  
pp. 211-219 ◽  
Author(s):  
Seiji Takeda ◽  
Mitsuhiro Aida
Keyword(s):  
Arabidopsis Thaliana ◽  
Shoot Apical Meristem ◽  
Apical Meristem

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 Cell-Based Model of the Generation and Maintenance of the Shape and Structure of the Multilayered Shoot Apical Meristem of Arabidopsis thaliana

2018 ◽  
Vol 81 (8) ◽  
pp. 3245-3281 ◽  
Author(s):  
Mikahl Banwarth-Kuhn ◽  
Ali Nematbakhsh ◽  
Kevin W. Rodriguez ◽  
Stephen Snipes ◽  
Carolyn G. Rasmussen ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Shoot Apical Meristem ◽  
Apical Meristem
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