ArticlePlant physiology2011
Regulatory subunit B'gamma of protein phosphatase 2A prevents unnecessary defense reactions under low light in Arabidopsis.
Article in Plant physiology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 39 papers.
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39 citing papers in PubMed, 82 citations in OpenAlex.
- Post-translational modifications: emerging directors of cell-fate decisions during endoplasmic reticulum stress in Arabidopsis thaliana.Biochemical Society transactions · 2024Review
- Genome-wide association studies for earliness, MYMIV resistance, and other associated traits in mungbean (PeerJ · 2024Article
- Differential expression of the genes encoding immune system components in response to3 Biotech · 2024Article
- Distinct Clades of Protein Phosphatase 2A Regulatory B'/B56 Subunits Engage in Different Physiological Processes.International journal of molecular sciences · 2023Review
- Protein-Protein Interactions and Quantitative Phosphoproteomic Analysis Reveal Potential Mitochondrial Substrates of Protein Phosphatase 2A-B'ζ Holoenzyme.Plants (Basel, Switzerland) · 2023Article
- ALA reverses ABA-induced stomatal closure by modulating PP2AC and SnRK2.6 activity in apple leaves.Horticulture research · 2023Article
- "B" Regulatory Subunits of PP2A: Their Roles in Plant Development and Stress Reactions.International journal of molecular sciences · 2023Review
- Systemic Signaling: A Role in Propelling Crop Yield.Plants (Basel, Switzerland) · 2022Review
- Article
- The protein phosphatase 2A catalytic subunit StPP2Ac2b enhances susceptibility to Phytophthora infestans and senescence in potato.PloS one · 2022Article
- ACONITASE 3 is part of theANAC017 transcription factor-dependent mitochondrial dysfunction response.Plant physiology · 2021Article
- The Arabidopsis mediator complex subunit 8 regulates oxidative stress responses.The Plant cell · 2021Article
- Protein Phosphatase 2A Catalytic Subunit PP2A-1 Enhances Rice Resistance to Sheath Blight Disease.Frontiers in genome editing · 2021Article
- Proteomics and phosphoproteomics revealed molecular networks of stomatal immune responses.Planta · 2020Article
- PROTEIN PHOSPHATASE 2A-B'Plant physiology · 2020Article
- The Protein Phosphatase PP2A-B'Plant physiology · 2020Article
- Evolutionary conservation and post-translational control of S-adenosyl-L-homocysteine hydrolase in land plants.PloS one · 2020Article
- The Role of Serine-Threonine Protein Phosphatase PP2A in Plant Oxidative Stress Signaling-Facts and Hypotheses.International journal of molecular sciences · 2019Review
- PP2A Phosphatases Take a Giant Leap in the Post-Genomics Era.Current genomics · 2019Review
- Silencing of the Wheat Protein Phosphatase 2A Catalytic Subunit TaPP2Ac Enhances Host Resistance to the Necrotrophic PathogenFrontiers in plant science · 2018Article
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Authors and funding
15 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Light is an important environmental factor that modulates acclimation strategies and defense responses in plants. We explored the functional role of the regulatory subunit B'γ (B'γ) of protein phosphatase 2A (PP2A) in light-dependent stress responses of Arabidopsis (Arabidopsis thaliana). The predominant form of PP2A consists of catalytic subunit C, scaffold subunit A, and highly variable regulatory subunit B, which determines the substrate specificity of PP2A holoenzymes. Mutant leaves of knockdown pp2a-b'γ plants show disintegration of chloroplasts and premature yellowing conditionally under moderate light intensity. The cell-death phenotype is accompanied by the accumulation of hydrogen peroxide through a pathway that requires CONSTITUTIVE EXPRESSION OF PR GENES5 (CPR5). Moreover, the pp2a-b'γ cpr5 double mutant additionally displays growth suppression and malformed trichomes. Similar to cpr5, the pp2a-b'γ mutant shows constitutive activation of both salicylic acid- and jasmonic acid-dependent defense pathways. In contrast to cpr5, however, pp2a-b'γ leaves do not contain increased levels of salicylic acid or jasmonic acid. Rather, the constitutive defense response associates with hypomethylation of DNA and increased levels of methionine-salvage pathway components in pp2a-b'γ leaves. We suggest that the specific B'γ subunit of PP2A is functionally connected to CPR5 and operates in the basal repression of defense responses under low irradiance.
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