scholarly journals RICE SALT SENSITIVE3 Forms a Ternary Complex with JAZ and Class-C bHLH Factors and Regulates Jasmonate-Induced Gene Expression and Root Cell Elongation

2013 ◽  
Vol 25 (5) ◽  
pp. 1709-1725 ◽  
Author(s):  
Yosuke Toda ◽  
Maiko Tanaka ◽  
Daisuke Ogawa ◽  
Kyo Kurata ◽  
Ken-ichi Kurotani ◽  
...  
Keyword(s):  
Gene Expression ◽  
Cell Elongation ◽  
Ternary Complex ◽  
Root Cell ◽  
Bhlh Factors ◽  
Class C

scholarly journals Arabidopsis thaliana RALF1 opposes brassinosteroid effects on root cell elongation and lateral root formation

2014 ◽  
Vol 65 (8) ◽  
pp. 2219-2230 ◽  
Author(s):  
Tábata Bergonci ◽  
Bianca Ribeiro ◽  
Paulo H.O. Ceciliato ◽  
Juan Carlos Guerrero-Abad ◽  
Marcio C. Silva-Filho ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Cell Elongation ◽  
Lateral Root ◽  
Root Formation ◽  
Root Cell ◽  
Lateral Root Formation

scholarly journals The Effects of High Steady State Auxin Levels on Root Cell Elongation in Brachypodium

2016 ◽  
Vol 28 (5) ◽  
pp. 1009-1024 ◽  
Author(s):  
David Pacheco-Villalobos ◽  
Sara M. Díaz-Moreno ◽  
Alja van der Schuren ◽  
Takayuki Tamaki ◽  
Yeon Hee Kang ◽  
...  
Keyword(s):  
Steady State ◽  
Cell Elongation ◽  
Root Cell

scholarly journals Identification of genes involved in the ACC-mediated control of root cell elongation in Arabidopsis thaliana

2012 ◽  
Vol 12 (1) ◽  
pp. 208 ◽  
Author(s):  
Marios Markakis ◽  
Tinne De Cnodder ◽  
Michal Lewandowski ◽  
Damien Simon ◽  
Agnieszka Boron ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Cell Elongation ◽  
Root Cell

scholarly journals The Ubiquitin Carboxyl Hydrolase BAP1 Forms a Ternary Complex with YY1 and HCF-1 and Is a Critical Regulator of Gene Expression

2010 ◽  
Vol 30 (21) ◽  
pp. 5071-5085 ◽  
Author(s):  
Helen Yu ◽  
Nazar Mashtalir ◽  
Salima Daou ◽  
Ian Hammond-Martel ◽  
Julie Ross ◽  
...  
Keyword(s):  
Gene Expression ◽  
Ternary Complex ◽  
Transcriptional Control ◽  
Molecular Mechanisms ◽  
Mitochondrial Protein ◽  
Coiled Coil ◽  
Dependent Manner ◽  
Cellular Processes ◽  
Rich Domain

ABSTRACT The candidate tumor suppressor BAP1 is a deubiquitinating enzyme (DUB) involved in the regulation of cell proliferation, although the molecular mechanisms governing its function remain poorly defined. BAP1 was recently shown to interact with and deubiquitinate the transcriptional regulator host cell factor 1 (HCF-1). Here we show that BAP1 assembles multiprotein complexes containing numerous transcription factors and cofactors, including HCF-1 and the transcription factor Yin Yang 1 (YY1). Through its coiled-coil motif, BAP1 directly interacts with the zinc fingers of YY1. Moreover, HCF-1 interacts with the middle region of YY1 encompassing the glycine-lysine-rich domain and is essential for the formation of a ternary complex with YY1 and BAP1 in vivo. BAP1 activates transcription in an enzymatic-activity-dependent manner and regulates the expression of a variety of genes involved in numerous cellular processes. We further show that BAP1 and HCF-1 are recruited by YY1 to the promoter of the cox7c gene, which encodes a mitochondrial protein used here as a model of BAP1-activated gene expression. Our findings (i) establish a direct link between BAP1 and the transcriptional control of genes regulating cell growth and proliferation and (ii) shed light on a novel mechanism of transcription regulation involving ubiquitin signaling.

Genetic analysis of the floral initiation process (FLIP) in Arabidopsis

Development ◽  
1993 ◽  
Vol 119 (3) ◽  
pp. 745-765 ◽  
Author(s):  
E. A. Schultz ◽  
G. W. Haughn
Keyword(s):  
Gene Expression ◽  
Gradual Transition ◽  
Altered Expression ◽  
Phase Switching ◽  
Terminal Flower ◽  
Class A ◽  
Lateral Shoots ◽  
Organ Identity ◽  
Terminal Flower 1 ◽  
Class C

Within the Arabidopsis inflorescence, two distinct developmental phases exist. The early inflorescence phase is characterized by nodes bearing coflorescences and leaves, and the late inflorescence phase by nodes bearing flowers. Four genes, TERMINAL FLOWER 1, LEAFY, APETALA1 and APETALA2 are necessary to initiate the switch from formation of early to formation of late inflorescence nodes at the appropriate time. We have investigated the relative roles of these genes in development by isolating and characterizing new alleles of TERMINAL FLOWER 1, LEAFY and APETALA1, and by constructing double mutants to test gene interactions. We suggest that the TERMINAL FLOWER 1 gene product is part of a mechanism that controls the timing of phase- switching in Arabidopsis. We propose that this mechanism involves factor(s) whose activity changes in response to shoot development and environmental variation. TERMINAL FLOWER 1 influences phase transitions in Arabidopsis, and appears to regulate the timing of expression of LEAFY, APETALA1 and APETALA2. LEAFY, APETALA1 and APETALA2 have partially redundant functions in initiating the floral program. In the absence of any one of the three genes, there is a gradual transition from coflorescence to flower-like lateral shoots. This suggests that (1) LEAFY, APETALA1 and APETALA2 are required in combination to ensure that the floral program is initiated rapidly and completely and (2) in the absence of one of the three genes, the others are activated slowly in response to the mechanism controlling timing of phase switching. Besides their role in establishing the floral program, phenotypes of flower-like lateral shoots in mutant inflorescences suggest that all three, LEAFY, APETALA1 and APETALA2, influence expression of whorl identity genes. Loss of LEAFY results in decreased Class B gene expression, as well as altered expression patterns of Class A and Class C genes. In the absence of either APETALA2 or APETALA1, reproductive organs develop in the perianth whorls, suggesting that both genes should be considered Class A organ identity genes, restricting Class C gene expression to inner whorls.

Reduced pectin content of cell walls prevents stress-induced root cell elongation in Arabidopsis

2020 ◽  
Author(s):  
Xiaohui Liu ◽  
Huiying Cui ◽  
Bochao Zhang ◽  
Min Song ◽  
Shaolin Chen ◽  
...  
Keyword(s):  
Cell Wall ◽  
Cell Elongation ◽  
Cell Walls ◽  
Microscopic Analysis ◽  
Root Cell ◽  
Cellulose Microfibrils ◽  
Composition Analysis ◽  
Cellulose Content ◽  
Cell Extension ◽  
Mechanistic Basis

Abstract The primary cell walls of plants provide mechanical strength while maintaining the flexibility needed for cell extension growth. Cell extension involves loosening the bonds between cellulose microfibrils, hemicelluloses and pectins. Pectins have been implicated in this process, but it remains unclear if this depends on the abundance of certain pectins, their modifications, and/or structure. Here, cell wall-related mutants of the model plant Arabidopsis were characterized by biochemical and immunohistochemical methods and Fourier-transform infrared microspectroscopy. Mutants with reduced pectin or hemicellulose content showed no root cell elongation in response to simulated drought stress, in contrast to wild-type plants or mutants with reduced cellulose content. While no association was found between the degrees of pectin methylesterification and cell elongation, cell wall composition analysis suggested an important role of the pectin rhamnogalacturonan II (RGII), which was corroborated in experiments with the RGII-modifying chemical 2β-deoxy-Kdo. The results were complemented by expression analysis of cell wall synthesis genes and microscopic analysis of cell wall porosity. It is concluded that a certain amount of pectin is necessary for stress-induced root cell elongation, and hypotheses regarding the mechanistic basis of this result are formulated.

scholarly journals Ethylene Upregulates Auxin Biosynthesis in Arabidopsis Seedlings to Enhance Inhibition of Root Cell Elongation

2007 ◽  
Vol 19 (7) ◽  
pp. 2186-2196 ◽  
Author(s):  
Ranjan Swarup ◽  
Paula Perry ◽  
Dik Hagenbeek ◽  
Dominique Van Der Straeten ◽  
Gerrit T.S. Beemster ◽  
...  
Keyword(s):  
Cell Elongation ◽  
Root Cell ◽  
Auxin Biosynthesis
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