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Stomatal regulators are co-opted for seta development in the astomatous liverwort Marchantia polymorpha

Abstract : The evolution of special types of cells requires the acquisition of new gene regulatory networks controlled by transcription factors (TFs). In stomatous plants, a TF module formed by subfamilies Ia and IIIb basic helix-loop-helix TFs (Ia-IIIb bHLH) regulates stomatal formation; however, how this module evolved during land plant diversification remains unclear. Here, we show that, in the astomatous liverwort Marchantia polymorpha , a Ia-IIIb bHLH module regulates the development of a unique sporophyte tissue, the seta, which is found in mosses and liverworts. The sole Ia bHLH gene, Mp SETA , and a IIIb bHLH gene, Mp ICE2 , regulate the cell division and/or differentiation of seta lineage cells. MpSETA can partially replace the stomatal function of Ia bHLH TFs in Arabidopsis thaliana , suggesting that a common regulatory mechanism underlies the setal and stomatal formation. Our findings reveal the co-option of a Ia-IIIb bHLH TF module for regulating cell fate determination and/or cell division of distinct types of cells during land plant evolution.
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Preprints, Working Papers, ...
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https://hal-cnrs.archives-ouvertes.fr/hal-03812124
Contributor : Gwyneth Ingram Connect in order to contact the contributor
Submitted on : Wednesday, October 12, 2022 - 2:35:10 PM
Last modification on : Thursday, October 13, 2022 - 3:43:34 AM

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Kenta Moriya, Makoto Shirakawa, Jeanne Loue-Manifel, Yoriko Matsuda, Yen-Ting Lu, et al.. Stomatal regulators are co-opted for seta development in the astomatous liverwort Marchantia polymorpha. {date}. ⟨hal-03812124⟩

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