A Subtilisin-like Serine Protease Involved in the Regulation of Stomatal Density and Distribution in Arabidopsis Thaliana
Overview
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Stomata are specialized cellular structures in the epidermis of aerial plant organs that control gas exchange (H(2)O release and CO(2) uptake) between leaves and the atmosphere by modulating the aperture of a pore flanked by two guard cells. Stomata are nonrandomly distributed, and their density is controlled by endogenous and environmental factors. To gain insight into the molecular mechanisms regulating stomatal distribution, Arabidopsis thaliana mutants with altered stomatal characteristics were isolated and examined. The sdd1-1 mutant exhibits a two- to fourfold increase of stomatal density and formation of clustered stomata (i.e., stomata that are not separated by intervening pavement cells), whereas the internal leaf architecture is not altered. The SDD1 gene was identified by map-based cloning. It encodes a subtilisin-like serine protease related to prokaryotic and eukaryotic proteins. We propose that SDD1 acts as a processing protease involved in the mediation of a signal that controls the development of cell lineages that lead to guard cell formation.
Stomatal patterning is differently regulated in adaxial and abaxial epidermis in Arabidopsis.
Jalakas P, Tulva I, Berzina N, Horak H J Exp Bot. 2024; 75(20):6476-6488.
PMID: 39158985 PMC: 11523041. DOI: 10.1093/jxb/erae354.
Century-long timelines of herbarium genomes predict plant stomatal response to climate change.
Lang P, Erberich J, Lopez L, Weiss C, Amador G, Fung H Nat Ecol Evol. 2024; 8(9):1641-1653.
PMID: 39117952 PMC: 11383800. DOI: 10.1038/s41559-024-02481-x.
Genot B, Grogan M, Yost M, Iacono G, Archer S, Burns J J Eukaryot Microbiol. 2024; 71(6):e13041.
PMID: 38952030 PMC: 11603287. DOI: 10.1111/jeu.13041.
Del Corpo D, Coculo D, Greco M, De Lorenzo G, Lionetti V Plant Commun. 2024; 5(8):100931.
PMID: 38689495 PMC: 11371470. DOI: 10.1016/j.xplc.2024.100931.
Zhao X, Zhang K, Zhang H, Bi M, He Y, Cui Y Front Plant Sci. 2023; 14:1283489.
PMID: 38078095 PMC: 10704031. DOI: 10.3389/fpls.2023.1283489.