The regulatory role of H2S in stomatal movement, including the dynamic regulation of phytohormones, ion homeostasis, and cell structural components

Interplay between hydrogen sulfide and other signaling molecules in the regulation of guard cell signaling and abiotic/biotic stress response

Liu H., Xue S. (2021)

Hai Liu, Shaowu Xue,

College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China

===

Plant Communications 2(3): 100179 – https://doi.org/10.1016/j.xplc.2021.100179 –

https://www.sciencedirect.com/science/article/pii/S2590346221000572

Abstract

Stomatal aperture controls the balance between transpirational water loss and photosynthetic carbon dioxide (CO₂) uptake. Stomata are surrounded by pairs of guard cells that sense and transduce environmental or stress signals to induce diverse endogenous responses for adaptation to environmental changes. In a recent decade, hydrogen sulfide (H₂S) has been recognized as a signaling molecule that regulates stomatal movement. In this review, we summarize recent progress in research on the regulatory role of H₂S in stomatal movement, including the dynamic regulation of phytohormones, ion homeostasis, and cell structural components. We focus especially on the cross talk among H₂S, nitric oxide (NO), and hydrogen peroxide (H₂O₂) in guard cells, as well as on H₂S-mediated post-translational protein modification (cysteine thiol persulfidation). Finally, we summarize the mechanisms by which H₂S interacts with other signaling molecules in plants under abiotic or biotic stress. Based on evidence and clues from existing research, we propose some issues that need to be addressed in the future.