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Regulation of gametangia and gametangiophore initiation in the liverwort Marchantia polymorpha

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The liverwort Marchantia polymorpha regulates gametangia and gametangiophore development by using evolutionarily conserved regulatory modules that are shared with angiosperm mechanisms regulating flowering and germ cell differentiation.

Abstract

Bryophytes, the earliest diverged lineage of land plants comprised of liverworts, mosses, and hornworts, produce gametes in gametangia, reproductive organs evolutionarily conserved but lost in extant angiosperms. Initiation of gametangium development is dependent on environmental factors such as light, although the underlying mechanisms remain elusive. Recent studies showed that the liverwort Marchantia polymorpha regulates development of gametangia and stalked receptacles called gametangiophores by using conserved regulatory modules which, in angiosperms, are involved in light signaling, microRNA-mediated flowering regulation, and germ cell differentiation. These findings suggest that these modules were acquired by a common ancestor of land plants before divergence of bryophytes, and were later recruited to flowering mechanism in angiosperms.

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Acknowledgements

This work is supported by MEXT/JSPS KAKENHI grants JP20H05780, JP19H04860, JP18K06285 (to S.Y.), JP20K15818 (to K.I.), JP19H03244, and 25113005 (to T.A.). S.Y. is also supported by Takeda Science Foundation and Asahi Glass Foundation.

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Correspondence to Shohei Yamaoka or Takashi Araki.

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Communicated by Frederic Berger.

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Yamaoka, S., Inoue, K. & Araki, T. Regulation of gametangia and gametangiophore initiation in the liverwort Marchantia polymorpha. Plant Reprod 34, 297–306 (2021). https://doi.org/10.1007/s00497-021-00419-y

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  • DOI: https://doi.org/10.1007/s00497-021-00419-y

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