Salicylic acid promotes quiescent center cell division through ROS accumulation and down‐regulation of PLT1, PLT2, and WOX5

2020 ◽  
Author(s):  
Zhuqing Wang ◽  
Duoyan Rong ◽  
Dixing Chen ◽  
Yang Xiao ◽  
Renyi Liu ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Cell Division ◽  
Quiescent Center ◽  
Down Regulation ◽  
Ros Accumulation ◽  
Center Cell

ERF115 Controls Root Quiescent Center Cell Division and Stem Cell Replenishment

Science ◽  
2013 ◽  
Vol 342 (6160) ◽  
pp. 860-863 ◽  
Author(s):  
J. Heyman ◽  
T. Cools ◽  
F. Vandenbussche ◽  
K. S. Heyndrickx ◽  
J. Van Leene ◽  
...  
Keyword(s):  
Stem Cell ◽  
Cell Division ◽  
Quiescent Center ◽  
Center Cell

scholarly journals Two SLENDER AND CRINKLY LEAF dioxygenases play an essential role in rice shoot development

2019 ◽  
Vol 71 (4) ◽  
pp. 1387-1401 ◽  
Author(s):  
Xiong Liu ◽  
Wen-Jing Cai ◽  
Xiaoming Yin ◽  
Di Yang ◽  
Tian Dong ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Leaf Development ◽  
Essential Role ◽  
Shoot Development ◽  
Down Regulation ◽  
Altered Expression ◽  
Encoding Genes

Abstract It is clear that 2-oxoglutarate-dependent dioxygenases have critical functions in salicylic acid (SA) metabolism in plants, yet their role in SA biosynthesis is poorly understood. Here, we report that two dioxygenase-encoding genes, SLENDER AND CRINKLY LEAF1 (SLC1) and SLC2, play essential roles in shoot development and SA production in rice. Overexpression of SLC1 (SLC1-OE) or SLC2 (SLC2-OE) in rice produced infertile plants with slender and crinkly leaves. Disruption of SLC1 or SLC2 led to dwarf plants, while simultaneous down-regulation of SLC1 and SLC2 resulted in a severe defect in early leaf development. Enhanced SA levels in SLC1-OE plants and decreased SA levels in slc1 and slc2 mutants were observed. Accordingly, these lines all showed altered expression of a set of SA-related genes. We demonstrated that SLC1 interacts with homeobox1 (OSH1), and that either the knotted1-like homeobox (KNOX1) or glutamate, leucine, and lysine (ELK) domain of OSH1 is sufficient for accomplishing this interaction. Collectively, our data reveal the importance of SLC1 and SLC2 in rice shoot development.

scholarly journals Contribution of Aggregation-Promoting Factor to Maintenance of Cell Shape in Lactobacillusgasseri 4B2

2003 ◽  
Vol 185 (11) ◽  
pp. 3288-3296 ◽  
Author(s):  
Ivana Jankovic ◽  
Marco Ventura ◽  
Valerie Meylan ◽  
Martine Rouvet ◽  
Marina Elli ◽  
...  
Keyword(s):  
Cell Division ◽  
Copy Number ◽  
Promoter Region ◽  
Cell Shape ◽  
Down Regulation ◽  
Copy Number Plasmid ◽  
Recombinant Cells ◽  
High Copy Number Plasmid ◽  
Induced Changes ◽  
First Time

ABSTRACT Aggregation-promoting factor (APF) was originally described as a protein involved in the conjugation and autoaggregation of Lactobacillus gasseri 4B2, whose corresponding apf gene was cloned and sequenced. In this report, we identified and sequenced an additional apf gene located in the region upstream of the previously published one. Inactivation of both apf genes was unsuccessful, indicating that APF function may be essential for the cell. Overproduction of APF proteins caused drastic alteration in the cell shape of this strain. These cells were irregular, twisted, enlarged, and tightly bound in unbreakable clumps of chains. Down-regulation of APF synthesis was achieved by cloning of the apf2 promoter region on a high-copy-number plasmid, which recruited a putative apf activator. As a consequence, the shape of the corresponding recombinant cells was elongated (filamentous) and cell division sites were no longer visible. None of the induced changes in APF production levels was clearly correlated with modifications of the aggregation phenotype. This report shows, for the first time, that APF proteins are mainly critical for L. gasseri 4B2 cell shape maintenance.

scholarly journals The ASH1-RELATED3 SET-Domain Protein Controls Cell Division Competence of the Meristem and the Quiescent Center of the Arabidopsis Primary Root

2014 ◽  
Vol 166 (2) ◽  
pp. 632-643 ◽  
Author(s):  
R. Kumpf ◽  
T. Thorstensen ◽  
M. A. Rahman ◽  
J. Heyman ◽  
H. Z. Nenseth ◽  
...  
Keyword(s):  
Cell Division ◽  
Primary Root ◽  
Quiescent Center ◽  
Set Domain ◽  
Domain Protein

scholarly journals Regulation of postreceptor signaling in the pheromone response pathway of Saccharomyces cerevisiae

1989 ◽  
Vol 9 (9) ◽  
pp. 3720-3726
Author(s):  
D Blinder ◽  
D D Jenness
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Cell Division ◽  
Prolonged Exposure ◽  
Pheromone Response ◽  
Down Regulation ◽  
Constitutive Activation ◽  
Pheromone Response Pathway ◽  
A Cells ◽  
Alpha Factor

alpha-Factor pheromone inhibits division of yeast a cells. After prolonged exposure to alpha-factor, the cells adapt to the stimulus and resume cell division. The sst2 mutation is known to inhibit adaptation. This report examines adaptation in scg1 (also designated gpa1) and STE4Hpl (Hpl indicates haploid lethal) mutants that exhibit constitutive activation of the pheromone response pathway. Recovery of the STE4Hpl mutant was blocked by the sst2-1 mutation, whereas recovery of the scg1-7 mutant was not completely blocked by sst2-1. These results indicate that both SST2-dependent and -independent mechanisms regulate postreceptor events in the pheromone response pathway. Down regulation of receptors in response to alpha-factor was independent of the signal that was generated in the scg1 mutant.

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