4.7 Review

What can hornworts teach us?

Journal

FRONTIERS IN PLANT SCIENCE
Volume 14, Issue -, Pages -

Publisher

FRONTIERS MEDIA SA
DOI: 10.3389/fpls.2023.1108027

Keywords

terrestrialization of plants; land plants; polyplastidy; pyrenoid; RNA editing; evo-devo; plant-cyanobacteria symbiosis; plant-mycorrhizal symbiosis

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Hornworts are a small group of land plants with 11 families and around 220 species. Their phylogenetic position and unique biology make them highly significant. The establishment of Anthoceros agrestis as an experimental model system has led to recent advances in hornwort research. This perspective discusses the development of A. agrestis as a model system, its comparison with other plant models, and its importance in comparative developmental studies, plant biology, and crop improvement.
The hornworts are a small group of land plants, consisting of only 11 families and approximately 220 species. Despite their small size as a group, their phylogenetic position and unique biology are of great importance. Hornworts, together with mosses and liverworts, form the monophyletic group of bryophytes that is sister to all other land plants (Tracheophytes). It is only recently that hornworts became amenable to experimental investigation with the establishment of Anthoceros agrestis as a model system. In this perspective, we summarize the recent advances in the development of A. agrestis as an experimental system and compare it with other plant model systems. We also discuss how A. agrestis can help to further research in comparative developmental studies across land plants and to solve key questions of plant biology associated with the colonization of the terrestrial environment. Finally, we explore the significance of A. agrestis in crop improvement and synthetic biology applications in general.

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