ArticleMolecular horticulture2023
The ABA-AtNAP-SAG113 PP2C module regulates leaf senescence by dephoshorylating SAG114 SnRK3.25 in Arabidopsis.
Article in Molecular horticulture, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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7 citing papers in PubMed, 10 citations in OpenAlex.
- The HD-Zip II Transcription FactorAntioxidants (Basel, Switzerland) · 2026Article
- Regulatory Role of Jasmonate Signaling in Dark-, Drought-, and Salt-Induced Leaf Senescence.International journal of molecular sciences · 2026Review
- Genome-wide identification and functional characterization of PP2C genes in the wild relative of sweet potato Ipomoea trifida.BMC plant biology · 2025Article
- The NAC Transcription FactorsInternational journal of molecular sciences · 2025Article
- Genome-wide identification and expression analysis of PP2C gene families in two Chimonanthus species.Genetica · 2025Article
- Phytohormonal Regulation of Abiotic Stress Tolerance, Leaf Senescence and Yield Response in Field Crops: A Comprehensive Review.Biotech (Basel (Switzerland)) · 2025Review
- Transcriptional Control of Seed Life: New Insights into the Role of the NAC Family.International journal of molecular sciences · 2024Review
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Authors and funding
3 authors at 3 institutions in 2 countries.
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No grant is acknowledged in the PubMed record.
Abstract
We previously reported that ABA inhibits stomatal closure through AtNAP-SAG113 PP2C regulatory module during leaf senescence. The mechanism by which this module exerts its function is unknown. Here we report the identification and functional analysis of SAG114, a direct target of the regulatory module. SAG114 encodes SnRK3.25. Both bimolecular fluorescence complementation (BiFC) and yeast two-hybrid assays show that SAG113 PP2C physically interacts with SAG114 SnRK3.25. Biochemically the SAG113 PP2C dephosphorylates SAG114 in vitro and in planta. RT-PCR and GUS reporter analyses show that SAG114 is specifically expressed in senescing leaves in Arabidopsis. Functionally, the SAG114 knockout mutant plants have a significantly bigger stomatal aperture and a much faster water loss rate in senescing leaves than those of wild type, and display a precocious senescence phenotype. The premature senescence phenotype of sag114 is epistatic to sag113 (that exhibits a remarkable delay in leaf senescence) because the sag113 sag114 double mutant plants show an early leaf senescence phenotype, similar to that of sag114. These results not only demonstrate that the ABA-AtNAP-SAG113 PP2C regulatory module controls leaf longevity by dephosphorylating SAG114 kinase, but also reveal the involvement of the SnRK3 family gene in stomatal movement and water loss during leaf senescence.
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