E.g. The cycle starts with the release of haploid spores from the sporangium that developed on the sporophyte. Some gametophytes form lobate green structures, as seen in Figure 2. Arthropods can assist in transfer of sperm.[13]. One point that must be remembered here is Sporophytes produce haploid spores by meiosis, that grow into gametophytes. Some primitive traits of green algae, such as flagellated sperm, are still present in mosses that are dependent on water for reproduction.
and a diploid sporophyte generation,
[6], Bryophytes exist in a wide variety of habitats. It generally involves the fusion of gametes. [34], Terrestrial plants that lack vascular tissue, Similarities to algae and vascular plants, List of British county and local bryophyte floras, "Bryophytes (Mosses and liverworts) — The Plant List", "Major transitions in the evolution of early land plants: a bryological perspective", "The effects of quantitative fecundity in the haploid stage on reproductive success and diploid fitness in the aquatic peat moss Sphagnum macrophyllum", "The deepest divergences in land plants inferred from phylogenomic evidence", "Conflicting Phylogenies for Early Land Plants are Caused by Composition Biases among Synonymous Substitutions", "Phylogeny of the moss class Polytrichopsida (BRYOPHYTA): Generic-level structure and incongruent gene trees", "Complete plastome sequences of Equisetum arvense and Isoetes flaccida: implications for phylogeny and plastid genome evolution of early land plant lineages", "Regeneration of Little Ice Age bryophytes emerging from a polar glacier with implications of totipotency in extreme environments", International Code of Nomenclature for algae, fungi, and plants, International Code of Nomenclature for Cultivated Plants, International Association for Plant Taxonomy, https://en.wikipedia.org/w/index.php?title=Bryophyte&oldid=983392080, Articles with unsourced statements from March 2020, Articles with sections that need to be turned into prose from April 2017, Creative Commons Attribution-ShareAlike License, This page was last edited on 14 October 2020, at 00:19. true. The short, blue-green gametophyte is the dominant phase of the lifecycle of a hornwort. The bryophytes show an alternation of generations between the independent gametophyte generation, which produces the sex organs and sperm and eggs, and the dependent sporophyte generation, which produces the spores.In contrast to vascular plants, the bryophyte sporophyte usually lacks a complex vascular system and produces only one spore-containing organ (sporangium) rather than many. Bryophytes are the group of plants that are the closest extant relative of early terrestrial plants. life cycle of a typical Bryophyte. By the end of this section, you will have completed the following objectives: Bryophytes are the group of plants that are the closest extant relative of early terrestrial plants.
Production of gametes involves mitosis, so the gametes are also haploid. Professor of Botany, University of British Columbia, Vancouver.