Journal
CURRENT PROTEIN & PEPTIDE SCIENCE
Volume 22, Issue 5, Pages 430-440Publisher
BENTHAM SCIENCE PUBL LTD
DOI: 10.2174/1389203722666210322144442
Keywords
Abiotic stress; dephosphorylation; phosphorylation; phytohormones PP2Cs; ABA signaling
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Funding
- Ministry of Science and Technology (MOST), Vietnam [DTDL.CN-12/19]
- Vingroup Joint Stock Company
- Domestic Master/PhD Scholarship Programme of Vingroup Innovation Foundation (VINIF), Vingroup Big Data Institute (VINBIGDATA) [VINIF.2020.TS.09]
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Plants, as sessile organisms, have developed multiple mechanisms to sense and transduce environmental stimuli for appropriate responses to abiotic stress factors over the course of evolution. Phosphorylation and dephosphorylation, regulated by protein kinases and protein phosphatases, play crucial roles in signal transduction mechanisms, with protein phosphatases type 2C (PP2Cs) representing a significant division in this process. PP2Cs have been found to have regulatory functions in the ABA-signaling pathway, highlighting their importance in plant adaptation to adverse environmental factors.
Plants, as sessile organisms, are susceptible to a myriad of stress factors, especially abiotic stresses. Over the course of evolution, they have developed multiple mechanisms to sense and transduce environmental stimuli for appropriate responses. Among those, phosphorylation and dephosphorylation, regulated by protein kinases and protein phosphatases, respectively, are considered crucial signal transduction mechanisms. Regarding the latter group, protein phosphatases type 2C (PP2Cs) represent the largest division of PPs. In addition, the discovery of regulatory functions of PP2Cs in the abscisic acid (ABA)-signaling pathway, the major signal transduction pathway in abiotic stress responses, indicates the significant importance of PP2C members in plant adaptation to adverse environmental factors. In this review, current understanding of the roles of PP2Cs in different phytohormone-dependent pathways related to abiotic stress is summarized, highlighting the crosstalk between the ABA-signaling pathway with other hormonal pathways via certain ABA-related PP2Cs. We also updated the progress of in planta characterization studies of PP2Cs under abiotic stress conditions, providing knowledge of PP2C manipulation in developing abiotic stress-tolerant crops.
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