Bichir external gills arise via heterochronic shift that accelerates hyoid arch development
| Autor: | Robert Cerny, Martin Minarik, Jan Stundl, Barbora Dobiasova, Brian D. Metscher, Peter Fabian, Vladimir Soukup, Anna Pospisilova, David Jandzik |
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| Přispěvatelé: | Stundl, Jan [0000-0002-3740-3378], Pospisilova, Anna [0000-0002-8252-0709], Fabian, Peter [0000-0002-1096-6875], Minarik, Martin [0000-0001-6660-0031], Metscher, Brian D [0000-0002-6514-4406], Soukup, Vladimir [0000-0002-1914-283X], Cerny, Robert [0000-0002-0022-0199], Apollo - University of Cambridge Repository |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0301 basic medicine Gills pharynx animal structures breathing QH301-705.5 Science 010603 evolutionary biology 01 natural sciences General Biochemistry Genetics and Molecular Biology 03 medical and health sciences developmental biology bichir medicine Animals Bichir Biology (General) Body Patterning External gills biology General Immunology and Microbiology General Neuroscience Pharynx evolutionary biology Fishes Neural crest Gene Expression Regulation Developmental Embryo Anatomy General Medicine head biology.organism_classification 030104 developmental biology medicine.anatomical_structure Branchial Region embryonic structures Medicine Other external gills Heterochrony Developmental biology Pharyngeal arch Research Article |
| Zdroj: | eLife eLife, Vol 8 (2019) |
| ISSN: | 2050-084X |
| DOI: | 10.7554/elife.43531 |
| Popis: | In most vertebrates, pharyngeal arches form in a stereotypic anterior-to-posterior progression. To gain insight into the mechanisms underlying evolutionary changes in pharyngeal arch development, here we investigate embryos and larvae of bichirs. Bichirs represent the earliest diverged living group of ray-finned fishes, and possess intriguing traits otherwise typical for lobe-finned fishes such as ventral paired lungs and larval external gills. In bichir embryos, we find that the anteroposterior way of formation of cranial segments is modified by the unique acceleration of the entire hyoid arch segment, with earlier and orchestrated development of the endodermal, mesodermal, and neural crest tissues. This major heterochronic shift in the anteroposterior developmental sequence enables early appearance of the external gills that represent key breathing organs of bichir free-living embryos and early larvae. Bichirs thus stay as unique models for understanding developmental mechanisms facilitating increased breathing capacity. |
| Databáze: | OpenAIRE |
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