Journal
PLANT REPRODUCTION
Volume 34, Issue 4, Pages 297-306Publisher
SPRINGER
DOI: 10.1007/s00497-021-00419-y
Keywords
Gametangium; Gametangiophore; Light signaling; microRNA; Germ cell; Marchantia polymorpha
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Funding
- MEXT/JSPS KAKENHI [JP20H05780, JP19H04860, JP18K06285, JP20K15818, JP19H03244, 25113005]
- Takeda Science Foundation
- Asahi Glass Foundation
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The liverwort Marchantia polymorpha regulates gametangia and gametangiophore development using evolutionarily conserved regulatory modules shared with angiosperms. These modules were likely acquired by a common ancestor of land plants before the divergence of bryophytes.
Key message 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. 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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