scholarly journals The Arabidopsis MYB96 Transcription Factor Is a Positive Regulator of ABSCISIC ACID-INSENSITIVE4 in the Control of Seed Germination

2015 ◽  
Vol 168 (2) ◽  
pp. 677-689 ◽  
Author(s):  
Kyounghee Lee ◽  
Hong Gil Lee ◽  
Seongmun Yoon ◽  
Hyun Uk Kim ◽  
Pil Joon Seo
Keyword(s):  
Transcription Factor ◽  
Abscisic Acid ◽  
Seed Germination ◽  
Positive Regulator

scholarly journals The AtMYB60 transcription factor regulates stomatal opening by modulating oxylipin synthesis in guard cells

2022 ◽  
Vol 12 (1) ◽  
Author(s):  
Fabio Simeoni ◽  
Aleksandra Skirycz ◽  
Laura Simoni ◽  
Giulia Castorina ◽  
Leonardo Perez de Souza ◽  
...  
Keyword(s):  
Transcription Factor ◽  
Abscisic Acid ◽  
Jasmonic Acid ◽  
Stomatal Closure ◽  
Guard Cells ◽  
Stomatal Opening ◽  
Gas Exchanges ◽  
Positive Regulator ◽  
Stomatal Regulation ◽  
Negative Modulator

AbstractStomata are epidermal pores formed by pairs of specialized guard cells, which regulate gas exchanges between the plant and the atmosphere. Modulation of transcription has emerged as an important level of regulation of stomatal activity. The AtMYB60 transcription factor was previously identified as a positive regulator of stomatal opening, although the details of its function remain unknown. Here, we propose a role for AtMYB60 as a negative modulator of oxylipins synthesis in stomata. The atmyb60-1 mutant shows reduced stomatal opening and accumulates increased levels of 12-oxo-phytodienoic acid (12-OPDA), jasmonic acid (JA) and jasmonoyl-l-isoleucine (JA-Ile) in guard cells. We provide evidence that 12-OPDA triggers stomatal closure independently of JA and cooperatively with abscisic acid (ABA) in atmyb60-1. Our study highlights the relevance of oxylipins metabolism in stomatal regulation and indicates AtMYB60 as transcriptional integrator of ABA and oxylipins responses in guard cells.

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