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Research article - Peer-reviewed, 2022

MS1/MMD1 homologues in the moss Physcomitrium patens are required for male and female gametogenesis

Landberg, Katarina; Lopez-Obando, Mauricio; Vera, Victoria Sanchez; Sundberg, Eva; Thelander, Mattias;

Abstract

The Arabidopsis Plant HomeoDomain (PHD) proteins AtMS1 and AtMMD1 provide chromatin-mediated transcriptional regulation essential for tapetum-dependent pollen formation. This pollen-based male gametogenesis is a derived trait of seed plants. Male gametogenesis in the common ancestors of land plants is instead likely to have been reminiscent of that in extant bryophytes where flagellated sperms are produced by an elaborate gametophyte generation. Still, also bryophytes possess MS1/MMD1-related PHD proteins. We addressed the function of two MS1/MMD1-homologues in the bryophyte model moss Physcomitrium patens by the generation and analysis of reporter and loss-of-function lines. The two genes are together essential for both male and female fertility by providing functions in the gamete-producing inner cells of antheridia and archegonia. They are furthermore expressed in the diploid sporophyte generation suggesting a function during sporogenesis, a process proposed related by descent to pollen formation in angiosperms. We propose that the moss MS1/MMD1-related regulatory network required for completion of male and female gametogenesis, and possibly for sporogenesis, represent a heritage from ancestral land plants.

Keywords

bryophyte; PHD protein; Physcomitrium patens; pollen; reproductive development; spore; sporogenesis; tapetum

Published in

New Phytologist

2022, volume: 236, number: 2, pages: 512-524
Publisher: WILEY

Authors' information

Swedish University of Agricultural Sciences, Department of Plant Biology
Swedish University of Agricultural Sciences, Department of Plant Biology
Sanchez vera, Victoria (Sanchez vera, Victoria)
Swedish University of Agricultural Sciences, Department of Plant Biology
Swedish University of Agricultural Sciences, Department of Plant Biology
Swedish University of Agricultural Sciences, Department of Plant Biology

UKÄ Subject classification

Agricultural Science

Publication Identifiers

DOI: https://doi.org/10.1111/nph.18352

URI (permanent link to this page)

https://res.slu.se/id/publ/118458