Reproductive Induction is a Far-Red High Irradiance Response that is Mediated by Phytochrome and PHYTOCHROME INTERACTING FACTOR in Marchantia polymorpha

Plant & Cell Physiology
Keisuke InoueTakayuki Kohchi

Abstract

Land plants have evolved a series of photoreceptors to precisely perceive environmental information. Among these, phytochromes are the sole photoreceptors for red light (R) and far-red light (FR), and play pivotal roles in modulating various developmental processes. Most extant land plants possess multiple phytochromes that probably evolved from a single phytochrome in the common ancestor of land plants. However, the ancestral phytochrome signaling mechanism remains unknown due to a paucity of knowledge regarding phytochrome functions in basal land plants. It has recently been reported that Mpphy, a single phytochrome in the liverwort Marchantia polymorpha, regulates typical photoreversible responses collectively classified as low fluence response (LFR). Here, we show that Mpphy also regulates the gametangiophore formation analogous to the mode of action of the far-red high irradiance response (FR-HIR) in angiosperms. Our phenotypic analyses using mutant plants obtained by CRISPR/Cas9-based genome editing revealed that MpFHY1, an ortholog of FAR-RED ELONGATED HYPOCOTYL1, as well as Mpphy is critical for the FR-HIR signaling in M. polymorpha. In addition, knockout of MpPIF, a single PHYTOCHROME INTERACTING FACTOR gene in M. poly...Continue Reading

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Citations

Nov 21, 2019·Nature Communications·Martina LegrisChristian Fankhauser
Nov 28, 2020·Planta·Durga Prasad Biswal, Kishore Chandra Sekhar Panigrahi
Dec 29, 2020·The New Phytologist·Facundo Romani, Javier E Moreno
Mar 9, 2021·Annual Review of Plant Biology·Takayuki KohchiRyuichi Nishihama
Jul 3, 2021·Current Biology : CB·Jorge Hernández-GarcíaMiguel A Blázquez

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