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Related Experiment Video

Updated: Sep 10, 2025

Author Spotlight: Image-Based Methods to Study Membrane Trafficking Events in Stomatal Lineage Cells

Author Spotlight: Image-Based Methods to Study Membrane Trafficking Events in Stomatal Lineage Cells

Published on: May 12, 2023

S-nitrosylation coordinates stomatal development and functions.

Christine Helen Foyer¹

¹School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK.

Developmental Cell

|August 19, 2025

Summary

Nitric oxide (NO) controls plant stomatal development. NO-mediated S-nitrosylation inhibits a key protein kinase, stabilizing a transcription factor essential for stomatal formation.

Area of Science:

Plant biology
Molecular biology
Cell signaling

Background:

Nitric oxide (NO) is a crucial signaling molecule in plants.
NO regulates various physiological processes, including stomatal development.
The exact molecular mechanisms by which NO influences stomatal formation are not fully understood.

Purpose of the Study:

To elucidate the molecular mechanisms underlying nitric oxide's role in stomatal development.
To identify specific targets and pathways modulated by NO during stomatal formation.

Main Methods:

The study utilized molecular and biochemical techniques.
Investigated the interaction between NO, protein kinases, and transcription factors.
Focused on the SPEECHLESS (SPCH) transcription factor and mitogen-activated protein kinase 6 (MPK6).

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Last Updated: Sep 10, 2025

Author Spotlight: Image-Based Methods to Study Membrane Trafficking Events in Stomatal Lineage Cells

Author Spotlight: Image-Based Methods to Study Membrane Trafficking Events in Stomatal Lineage Cells

Published on: May 12, 2023

Identification of the Genes Involved in Stomatal Development via Epidermal Phenotype Scoring

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Published on: January 20, 2023

Author Spotlight: Advancing Stomatal Research with Automated Aperture Measurement

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Published on: February 9, 2024

Main Results:

Nitric oxide-mediated S-nitrosylation was found to inhibit the phosphorylation activity of MPK6.
This inhibition leads to the stabilization of the SPEECHLESS (SPCH) transcription factor.
Stabilization of SPCH is critical for promoting stomatal initiation and development.

Conclusions:

NO plays a regulatory role in stomatal development through S-nitrosylation of MPK6.
This mechanism ensures proper stomatal formation by controlling SPCH stability.
Provides a new understanding of NO signaling in plant development.