Physcomitrium LATERAL SUPPRESSOR genes promote formative cell divisions to produce germ cell lineages in both male and female gametangia.

ABSTRACT: The evolution of green plants from aquatic to terrestrial environments is thought to have been facilitated by the acquisition of gametangia, specialized multicellular organs housing gametes. Antheridia and archegonia, responsible for producing and protecting sperm and egg cells, undergo formative cell divisions to produce a cell to differentiate into germ cell lineages and the other cell to give rise to surrounding structures. However, the genes governing this process remain unidentified. We isolated genes expressed during gametangia development from previously established gene-trap lines of Physcomitrium patens and characterized their function during gametangia formation. We identified P. patens LATERAL SUPPRESSOR 1 (PpLAS1) from the gene-trap library, encoding a GRAS transcription factor

SUBMITTER: Horiuchi Y 

PROVIDER: S-EPMC11798890 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature