ArticlePlant physiology2017
Hornwort Stomata: Architecture and Fate Shared with 400-Million-Year-Old Fossil Plants without Leaves.
Article in Plant physiology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.
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Who cites it
33 citing papers in PubMed.
- Mosses Reveal a Universal Genome-Cell Size Relationship Across Land Plants Shaped by Shared Evolutionary Pressures.Plant, cell & environment · 2026Article
- Evolutionary-based remodeling of ABA receptors reveals the structural basis of hormone perception and regulation.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
- Guardians of Water and Gas Exchange: Adaptive Dynamics of Stomatal Development and Patterning.Plants (Basel, Switzerland) · 2025Review
- In situ cavitation bubble manometry reveals a lack of light-activated guard cell turgor modulation in bryophytes.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- Pan-phylum genomes of hornworts reveal conserved autosomes but dynamic accessory and sex chromosomes.Nature plants · 2025Article
- Molecular and morphological insights intoPhytoKeys · 2025Article
- Gaining or cutting SLAC: the evolution of plant guard cell signalling pathways.The New phytologist · 2024Article
- Architecture and functions of stomatal cell walls in eudicots and grasses.Annals of botany · 2024Review
- Sporogenesis inFrontiers in cell and developmental biology · 2023Article
- What can hornworts teach us?Frontiers in plant science · 2023Review
- Stress, senescence, and specialized metabolites in bryophytes.Journal of experimental botany · 2022Review
- Arabinogalactan Protein-Like Proteins FromFrontiers in plant science · 2022Article
- An Agrobacterium-mediated stable transformation technique for the hornwort model Anthoceros agrestis.The New phytologist · 2021Article
- Stomata: the holey grail of plant evolution.American journal of botany · 2021Article
- The hornworts: morphology, evolution and development.The New phytologist · 2021Review
- An Intrinsic Geometric Constraint on Morphological Stomatal Traits.Frontiers in plant science · 2021Article
- Origins and Evolution of Cuticle Biosynthetic Machinery in Land Plants.Plant physiology · 2020Article
- Anthoceros genomes illuminate the origin of land plants and the unique biology of hornworts.Nature plants · 2020Article
- Stomata and Sporophytes of the Model MossFrontiers in plant science · 2020Article
- A Permeable Cuticle, Not Open Stomata, Is the Primary Source of Water Loss From Expanding Leaves.Frontiers in plant science · 2020Article
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Authors and funding
5 authors.
Funding
Abstract
As one of the earliest plant groups to evolve stomata, hornworts are key to understanding the origin and function of stomata. Hornwort stomata are large and scattered on sporangia that grow from their bases and release spores at their tips. We present data from development and immunocytochemistry that identify a role for hornwort stomata that is correlated with sporangial and spore maturation. We measured guard cells across the genera with stomata to assess developmental changes in size and to analyze any correlation with genome size. Stomata form at the base of the sporophyte in the green region, where they develop differential wall thickenings, form a pore, and die. Guard cells collapse inwardly, increase in surface area, and remain perched over a substomatal cavity and network of intercellular spaces that is initially fluid filled. Following pore formation, the sporophyte dries from the outside inwardly and continues to do so after guard cells die and collapse. Spore tetrads develop in spore mother cell walls within a mucilaginous matrix, both of which progressively dry before sporophyte dehiscence. A lack of correlation between guard cell size and DNA content, lack of arabinans in cell walls, and perpetually open pores are consistent with the inactivity of hornwort stomata. Stomata are expendable in hornworts, as they have been lost twice in derived taxa. Guard cells and epidermal cells of hornworts show striking similarities with the earliest plant fossils. Our findings identify an architecture and fate of stomata in hornworts that is ancient and common to plants without sporophytic leaves.
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