ArticleProceedings of the National Academy of Sciences of the United States of America2006
Protein phosphatase 1 positively regulates stomatal opening in response to blue light in Vicia faba.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2006. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 60 papers.
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Who cites it
60 citing papers in PubMed, 136 citations in OpenAlex.
- Guard cell signal transduction mechanisms controlling stomatal movements by light, abscisic acid, CO2, VPD and heat.Plant physiology · 2026Review
- Phosphorylation of WDR48 by phototropins drives starch degradation to promote stomatal opening.Nature communications · 2026Article
- ABA receptor isoforms differently regulate stomatal movements and generation of reactive oxygen species in ABA signaling in Arabidopsis guard cells.Plant & cell physiology · 2025Article
- Identification of a novel stomatal opening chemical, PP242, that inhibits early abscisic acid signal transduction in guard cells.Plant & cell physiology · 2025Article
- A CRY1-HY5-MYB signaling cascade fine-tunes guard cell reactive oxygen species levels and triggers stomatal opening.The Plant cell · 2025Article
- Article
- Starch metabolism in guard cells: At the intersection of environmental stimuli and stomatal movement.Plant physiology · 2024Review
- Light-induced stomatal opening requires phosphorylation of the C-terminal autoinhibitory domain of plasma membrane HNature communications · 2024Article
- Phosphorylation of plasma membrane HNature communications · 2024Article
- Review
- Genome-wide identification and expression analysis of the cucumber PP2C gene family.BMC genomics · 2022Article
- Phosphorylation of the plasma membrane H+-ATPase AHA2 by BAK1 is required for ABA-induced stomatal closure in Arabidopsis.The Plant cell · 2022Article
- Type 2C protein phosphatase clade D family members dephosphorylate guard cell plasma membrane H+-ATPase.Plant physiology · 2022Article
- Identification of stomatal-regulating molecules from de novo arylamine collection through aromatic C-H amination.Scientific reports · 2022Article
- Tryptophan synthase ß subunit 1 affects stomatal phenotypes inFrontiers in plant science · 2022Article
- Rice protein phosphatase 1 regulatory subunits OsINH2 and OsINH3 participate actively in growth and adaptive responses under abscisic acid.Frontiers in plant science · 2022Article
- Guard-Cell-Specific Expression of Phototropin2 C-Terminal Fragment Enhances Leaf Transpiration.Plants (Basel, Switzerland) · 2021Article
- Wheat Type One Protein Phosphatase Participates in the Brassinosteroid Control of Root Growth via Activation of BES1.International journal of molecular sciences · 2021Article
- A BLUS1 kinase signal and a decrease in intercellular CO2 concentration are necessary for stomatal opening in response to blue light.The Plant cell · 2021Article
- Genome-wide characterization and expression analysis of TOPP-type protein phosphatases in soybean (Glycine max L.) reveal the role of GmTOPP13 in drought tolerance.Genes & genomics · 2021Article
Corrections and comments
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Authors and funding
4 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Phototropins, plant blue light receptors, mediate stomatal opening through the activation of the plasma membrane H(+)-ATPase by unknown mechanisms. Here we report that type 1 protein phosphatase (PP1) positively regulates the blue light signaling between phototropins and the H(+)-ATPase in guard cells of Vicia faba. We cloned the four catalytic subunits of PP1 (PP1c) from guard cells and determined the expression of the isoforms in various tissues. Transformation of Vicia guard cells with PP1c isoforms that had lost enzymatic activity by one amino acid mutation, or with human inhibitor-2, a specific inhibitor protein of PP1c, suppressed blue light-induced stomatal opening. Addition of fusicoccin, an activator of the plasma membrane H(+)-ATPase, to these transformed guard cells induced normal stomatal opening, suggesting that the transformations did not affect the basic mechanisms for stomatal opening. Tautomycin, an inhibitor of PP1, inhibited blue light-induced H(+) pumping, phosphorylation of the plasma membrane H(+)-ATPase in guard cell protoplasts, and stomatal opening. However, tautomycin did not inhibit the blue light-dependent phosphorylation of phototropins. We conclude that PP1 functions downstream of phototropins and upstream of the H(+)-ATPase in the blue light signaling pathway of guard cells.
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