scholarly journals Arabidopsis INCURVATA2 Regulates Salicylic Acid and Abscisic Acid Signaling, and Oxidative Stress Responses

2015 ◽  
pp. pcv132 ◽  
Author(s):  
Rosa Micol-Ponce ◽  
Ana Belén Sánchez-García ◽  
Qian Xu ◽  
José María Barrero ◽  
José Luis Micol ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Salicylic Acid ◽  
Abscisic Acid ◽  
Stress Responses ◽  
Abscisic Acid Signaling ◽  
Oxidative Stress Responses ◽  
And Oxidative Stress

scholarly journals Salicylic acid antagonism of EDS1-driven cell death is important for immune and oxidative stress responses in Arabidopsis

2010 ◽  
Vol 62 (4) ◽  
pp. 628-640 ◽  
Author(s):  
Marco R. Straus ◽  
Steffen Rietz ◽  
Emiel Ver Loren van Themaat ◽  
Michael Bartsch ◽  
Jane E. Parker
Keyword(s):  
Oxidative Stress ◽  
Cell Death ◽  
Salicylic Acid ◽  
Stress Responses ◽  
Oxidative Stress Responses ◽  
And Oxidative Stress

scholarly journals The Arabidopsis mediator complex subunit 8 regulates oxidative stress responses

2021 ◽  
Author(s):  
Huaming He ◽  
Jordi Denecker ◽  
Katrien Van Der Kelen ◽  
Patrick Willems ◽  
Robin Pottie ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Gene Expression ◽  
Salicylic Acid ◽  
Jasmonic Acid ◽  
Stress Responses ◽  
Negative Regulator ◽  
Mediator Complex ◽  
Defense Gene Expression ◽  
A Genome ◽  
Oxidative Stress Responses

Abstract Signaling events triggered by hydrogen peroxide (H2O2) regulate plant growth and defense by orchestrating a genome-wide transcriptional reprogramming. However, the specific mechanisms that govern H2O2-dependent gene expression are still poorly understood. Here, we identify the Arabidopsis Mediator complex subunit MED8 as a regulator of H2O2 responses. The introduction of the med8 mutation in a constitutive oxidative stress genetic background (catalase-deficient, cat2) was associated with enhanced activation of the salicylic acid pathway and accelerated cell death. Interestingly, med8 seedlings were more tolerant to oxidative stress generated by the herbicide methyl viologen (MV) and exhibited transcriptional hyperactivation of defense signaling, in particular salicylic acid- and jasmonic acid-related pathways. The med8-triggered tolerance to MV was manipulated by the introduction of secondary mutations in salicylic acid and jasmonic acid pathways. In addition, analysis of the Mediator interactome revealed interactions with components involved in mRNA processing and microRNA biogenesis, hence expanding the role of Mediator beyond transcription. Notably, MED8 interacted with the transcriptional regulator NEGATIVE ON TATA-LESS, NOT2, to control the expression of H2O2-inducible genes and stress responses. Our work establishes MED8 as a component regulating oxidative stress responses and demonstrates that it acts as a negative regulator of H2O2-driven activation of defense gene expression.

The ECF sigma factor σTis involved in osmotic and oxidative stress responses in Caulobacter crescentus

2007 ◽  
Vol 66 (5) ◽  
pp. 1240-1255 ◽  
Author(s):  
Cristina E. Alvarez-Martinez ◽  
Rogério F. Lourenço ◽  
Regina L. Baldini ◽  
Michael T. Laub ◽  
Suely L. Gomes
Keyword(s):  
Oxidative Stress ◽  
Stress Responses ◽  
Sigma Factor ◽  
Caulobacter Crescentus ◽  
Ecf Sigma Factor ◽  
Oxidative Stress Responses ◽  
And Oxidative Stress
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