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Hydrogen sulphide as a guard cell network regulator.

Rosario Pantaleno¹, Denise Scuffi¹, Carlos García-Mata¹

¹Instituto de Investigaciones Biológicas, Universidad Nacional de Mar del Plata, Consejo Nacional de Investigaciones Científicas y Técnicas, Mar del Plata, 7600, Argentina.

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|November 30, 2020

Summary

Hydrogen sulphide (H₂ S) is a gasotransmitter regulating plant stomatal movement. This study shows H₂ S acts as a key regulator within the guard cell signaling network controlling stomatal pore size.

Keywords:

gasotransmitters guard cell signalling hydrogen sulphide (H2S)persulphidation signalling stomatal movement

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Area of Science:

Plant Physiology
Molecular Signaling
Biochemistry

Background:

Hydrogen sulphide (H₂ S) is an endogenous gasotransmitter involved in plant signaling.
Stomatal movement, regulated by guard cells (GCs), is crucial for plant gas exchange and water balance.
Guard cell signaling networks integrate environmental and endogenous signals to control stomatal aperture.

Purpose of the Study:

To investigate the role of H₂ S in the guard cell signaling network.
To elucidate the interplay between H₂ S and key components of guard cell signaling.
To determine if H₂ S regulates the core signaling pathway in guard cells.

Main Methods:

Literature review and synthesis of existing evidence on H₂ S and guard cell signaling.
Analysis of signaling pathways within guard cells.
Identification of core components in the guard cell signaling network.

Main Results:

H₂ S is an active signaling component in multiple plant processes, including stomatal movement.
Guard cells act as signal transducers, controlling stomatal pore size via a complex signaling network.
A core set of highly connected components links most pathways within the guard cell network.

Conclusions:

Evidence suggests H₂ S interacts with key components of guard cell networks.
H₂ S emerges as a significant regulator of the guard cell core signaling pathway.
H₂ S plays a vital role in modulating stomatal movement through guard cell signaling.