scholarly journals Arabidopsis thaliana miRNAs promote embryo pattern formation beginning in the zygote

2017 ◽  
Vol 431 (2) ◽  
pp. 145-151 ◽  
Author(s):  
Alma Armenta-Medina ◽  
Daniel Lepe-Soltero ◽  
Daoquan Xiang ◽  
Raju Datla ◽  
Cei Abreu-Goodger ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Pattern Formation

The HKM gene, which is identical to the MS1 gene of Arabidopsis thaliana, is essential for primexine formation and exine pattern formation

2005 ◽  
Vol 18 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Tohru Ariizumi ◽  
Katsunori Hatakeyama ◽  
Kokichi Hinata ◽  
Shusei Sato ◽  
Tomohiko Kato ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Pattern Formation

scholarly journals Molecular analysis of NOZZLE, a gene involved in pattern formation and early sporogenesis during sex organ development in Arabidopsis thaliana

1999 ◽  
Vol 96 (20) ◽  
pp. 11664-11669 ◽  
Author(s):  
U. Schiefthaler ◽  
S. Balasubramanian ◽  
P. Sieber ◽  
D. Chevalier ◽  
E. Wisman ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Pattern Formation ◽  
Molecular Analysis ◽  
Organ Development

A series of novel mutants of Arabidopsis thaliana that are defective in the formation of continuous vascular network: calling the auxin signal flow canalization hypothesis into question

Development ◽  
2000 ◽  
Vol 127 (15) ◽  
pp. 3197-3204 ◽  
Author(s):  
K. Koizumi ◽  
M. Sugiyama ◽  
H. Fukuda
Keyword(s):  
Arabidopsis Thaliana ◽  
Pattern Formation ◽  
Genetic Analysis ◽  
Molecular Mechanisms ◽  
Vascular Tissue ◽  
Early Stage ◽  
Diffusion Reaction ◽  
Signal Flow ◽  
Vein Formation ◽  
Mutant Lines

For the genetic analysis of molecular mechanisms underlying temporal and spatial regulation of vascular pattern formation, we isolated mutants of Arabidopsis thaliana that are impaired in vascular patterning. Microscopic examination of the cotyledonary venation of 3,400 M(3) lines led to the identification of 12 mutant lines. Genetic analysis of 8 of these mutant lines indicated that vein pattern formation in these lines resulted from monogenic recessive mutations in 7 different genes, designated VAN1 through VAN7. Mutations in VAN1 through VAN6 genes caused fragmentation (disconnection or partial loss) of lateral veins of the cotyledon and tertiary veins of the rosette leaf whereas they were less injurious to the formation of major veins. Detailed characterization of the van3 mutant using pAthb8::GUS and pTED3::GUS, as molecular markers for the early stage of vascular tissue formation showed that the provascular tissue of the cotyledonary lateral veins was differentiated in fragments during late embryogenesis. These phenotypes of the van mutants are discussed in relation to the auxin signal flow canalization hypothesis and the diffusion-reaction prepattern hypothesis, with the fragility of the continuity in the minor vein formation favoring the latter hypothesis.

Dissection of sexual organ ontogenesis: a genetic analysis of ovule development in Arabidopsis thaliana

Development ◽  
1997 ◽  
Vol 124 (7) ◽  
pp. 1367-1376 ◽  
Author(s):  
K. Schneitz ◽  
M. Hulskamp ◽  
S.D. Kopczak ◽  
R.E. Pruitt
Keyword(s):  
Arabidopsis Thaliana ◽  
Pattern Formation ◽  
Large Scale ◽  
Control Level ◽  
Three Dimensional ◽  
Flowering Plant ◽  
Ovule Development ◽  
Cellular Processes ◽  
Mature Ovule ◽  
And Control

Understanding organogenesis remains a major challenge in biology. Specification, initiation, pattern formation and cellular morphogenesis, have to be integrated to generate the final three-dimensional architecture of a multicellular organ. To tackle this problem we have chosen the ovules of the flowering plant Arabidopsis thaliana as a model system. In a first step towards a functional analysis of ovule development, we performed a large-scale genetic screen and isolated a number of sterile mutants with aberrant ovule development, We provide indirect genetic evidence for the existence of proximal-distal pattern formation in the Arabidopsis ovule primordium. The analysis of the mutants has identified genes that act at an intermediate regulatory level and control initiation of morphogenesis in response to proximal-distal patterning. A second group of genes functions at a subordinate control level and regulates general cellular processes of morphogenesis. A large group of male and female sterile mutants shows defects restricted to early or late gametogenesis. In addition, we propose that the mature ovule obtains its overall curved shape by at least three different processes that act in only one domain of the ovule.

Pattern formation and growth during floral organogenesis: HUELLENLOS and AINTEGUMENTA are required for the formation of the proximal region of the ovule primordium in Arabidopsis thaliana

Development ◽  
1998 ◽  
Vol 125 (14) ◽  
pp. 2555-2563 ◽  
Author(s):  
K. Schneitz ◽  
S.C. Baker ◽  
C.S. Gasser ◽  
A. Redweik
Keyword(s):  
Arabidopsis Thaliana ◽  
Pattern Formation ◽  
Molecular Mechanisms ◽  
Embryo Sac ◽  
Typical Feature ◽  
Proximal Region ◽  
Ovule Development ◽  
Linear Arrangement ◽  
Floral Organogenesis ◽  
Temporal And Spatial

Our understanding of the molecular mechanisms that regulate and integrate the temporal and spatial control of cell proliferation during organ ontogenesis, particularly of floral organs, continues to be primitive. The ovule, the progenitor of the seed, of Arabidopsis thaliana has been used to develop an effective model system for the analysis of plant organogenesis. A typical feature of a generalized ovule is the linear arrangement of at least three distinct elements, the funiculus, chalaza and nucellus, along a proximal-distal axis. This pattern is supposed to be established during the early proliferative phase of ovule development. We provide genetic evidence that the young ovule primordium indeed is a composite structure. Two genes, HUELLENLOS and AINTEGUMENTA have overlapping functions in the ovule and differentially control the formation of the central and proximal elements of the primordium. The results indicate that proximal-distal pattern formation in the Arabidopsis ovule takes place in a sequential fashion, starting from the distal end. Furthermore, we show that HUELLENLOS also regulates the initiation and/or maintenance of integument and embryo sac ontogenesis and interestingly prevents inappropriate cell death in the young ovule.

Spatial pattern formation in the flower of Arabidopsis thaliana: Mathematical modeling

2005 ◽  
Vol 401 (1-6) ◽  
pp. 133-135 ◽  
Author(s):  
D. V. Alexeev ◽  
T. A. Ezhova ◽  
V. N. Kozlov ◽  
V. B. Kudryavtsev ◽  
M. V. Nosov ◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Arabidopsis Thaliana ◽  
Pattern Formation ◽  
Spatial Pattern ◽  
Spatial Pattern Formation

scholarly journals Dynamics of MONOPTEROS and PIN-FORMED1 expression during leaf vein pattern formation in Arabidopsis thaliana

2007 ◽  
Vol 49 (3) ◽  
pp. 387-398 ◽  
Author(s):  
Carol L. Wenzel ◽  
Mathias Schuetz ◽  
Qian Yu ◽  
Jim Mattsson
Keyword(s):  
Arabidopsis Thaliana ◽  
Pattern Formation ◽  
Vein Pattern ◽  
Leaf Vein
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