scholarly journals Arabidopsis plants deficient in plastidial glyceraldehyde-3-phosphate dehydrogenase show alterations in abscisic acid (ABA) signal transduction: interaction between ABA and primary metabolism

2010 ◽  
Vol 62 (3) ◽  
pp. 1229-1239 ◽  
Author(s):  
Jesús Muñoz-Bertomeu ◽  
María Angeles Bermúdez ◽  
Juan Segura ◽  
Roc Ros
Keyword(s):  
Signal Transduction ◽  
Abscisic Acid ◽  
Primary Metabolism ◽  
Aba Signal Transduction

scholarly journals MAP3Kinase-dependent SnRK2-kinase activation is required for abscisic acid signal transduction and rapid osmotic stress response

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Yohei Takahashi ◽  
Jingbo Zhang ◽  
Po-Kai Hsu ◽  
Paulo H. O. Ceciliato ◽  
Li Zhang ◽  
...  
Keyword(s):  
Signal Transduction ◽  
Abscisic Acid ◽  
Osmotic Stress ◽  
Knock Out ◽  
Kinase Activation ◽  
Aba Signal Transduction ◽  
Osmotic Stress Response ◽  
Stress Signal ◽  
Biochemical Analyses

AbstractAbiotic stresses, including drought and salinity, trigger a complex osmotic-stress and abscisic acid (ABA) signal transduction network. The core ABA signalling components are snf1-related protein kinase2s (SnRK2s), which are activated by ABA-triggered inhibition of type-2C protein-phosphatases (PP2Cs). SnRK2 kinases are also activated by a rapid, largely unknown, ABA-independent osmotic-stress signalling pathway. Here, through a combination of a redundancy-circumventing genetic screen and biochemical analyses, we have identified functionally-redundant MAPKK-kinases (M3Ks) that are necessary for activation of SnRK2 kinases. These M3Ks phosphorylate a specific SnRK2/OST1 site, which is indispensable for ABA-induced reactivation of PP2C-dephosphorylated SnRK2 kinases. ABA-triggered SnRK2 activation, transcription factor phosphorylation and SLAC1 activation require these M3Ks in vitro and in plants. M3K triple knock-out plants show reduced ABA sensitivity and strongly impaired rapid osmotic-stress-induced SnRK2 activation. These findings demonstrate that this M3K clade is required for ABA- and osmotic-stress-activation of SnRK2 kinases, enabling robust ABA and osmotic stress signal transduction.

scholarly journals Signalling of abscisic acid to regulate plant growth

1998 ◽  
Vol 353 (1374) ◽  
pp. 1439-1444 ◽  
Author(s):  
Axel Himmelbach ◽  
Monika Iten ◽  
Erwin Grill
Keyword(s):  
Signal Transduction ◽  
Abscisic Acid ◽  
Mammalian Cells ◽  
Growth Control ◽  
Signal Transduction Pathway ◽  
Negative Control ◽  
Transduction Pathway ◽  
Aba Signal Transduction ◽  
Experimental Approaches ◽  
Main Components

Abscisic acid (ABA) mediated growth control is a fundamental response of plants to adverse environmental cues. The linkage between ABA perception and growth control is currently being unravelled by using different experimental approaches such as mutant analysis and microinjection experiments. So far, two protein phosphatases, ABI1 and ABI2, cADPR, pH and Ca 2+ have been identified as main components of the ABA signalling pathway. Here, the ABA signal transduction pathway is compared to signalling cascades from yeast and mammalian cells. A model for a bifurcated ABA signal transduction pathway exerting a positive and negative control mechanism is proposed.

scholarly journals Roles of Glutathione in Mediating Abscisic Acid Signaling and Its Regulation of Seed Dormancy and Drought Tolerance

Genes ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 1620
Author(s):  
Murali Krishna Koramutla ◽  
Manisha Negi ◽  
Belay T. Ayele
Keyword(s):  
Signal Transduction ◽  
Abscisic Acid ◽  
Seed Dormancy ◽  
Growth And Development ◽  
Current Knowledge ◽  
Stomatal Closure ◽  
Redox Homeostasis ◽  
Critical Role ◽  
Stress Conditions ◽  
Signal Perception

Plant growth and development and interactions with the environment are regulated by phytohormones and other signaling molecules. During their evolution, plants have developed strategies for efficient signal perception and for the activation of signal transduction cascades to maintain proper growth and development, in particular under adverse environmental conditions. Abscisic acid (ABA) is one of the phytohormones known to regulate plant developmental events and tolerance to environmental stresses. The role of ABA is mediated by both its accumulated level, which is regulated by its biosynthesis and catabolism, and signaling, all of which are influenced by complex regulatory mechanisms. Under stress conditions, plants employ enzymatic and non-enzymatic antioxidant strategies to scavenge excess reactive oxygen species (ROS) and mitigate the negative effects of oxidative stress. Glutathione (GSH) is one of the main antioxidant molecules playing a critical role in plant survival under stress conditions through the detoxification of excess ROS, maintaining cellular redox homeostasis and regulating protein functions. GSH has recently emerged as an important signaling molecule regulating ABA signal transduction and associated developmental events, and response to stressors. This review highlights the current knowledge on the interplay between ABA and GSH in regulating seed dormancy, germination, stomatal closure and tolerance to drought.

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