Variation in the schedules of somite and neural development in frogs.

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dc.careerCiencias Biológicases
dc.category.authorprincipalen_US
dc.contributor.authorDel Pino Veintimilla, Eugenia
dc.contributor.correspondingSáenz Ponce, Natalia
dc.countryEcuadores
dc.date.accessioned2023-11-04T21:37:40Z
dc.date.available2023-11-04T21:37:40Z
dc.date.issued2012
dc.dedication.authorTCes
dc.description.abstractThe timing of notochrod, somite, and neural development was analyzed in the embryos of six differnt frog species, which have been divided into two groups, according to their developmental speed. Rapid developing species investigated were Xenopus laevis (Pipidae), Engystomops coloradorum, and Engystomops randi (Leiuperidae). the slow developers were Epipedobates machalilla and Epipedobates tricolor (Dendrobatidae) and Gastrotheca riobambae (Hemiphractidae). Blastopore closure, notochord formation, somite development, neural tube closure, and the formation of cranial neural crest cell-streams were detected by light and scanning electron microscopy and by immuno-hisochemical detection of somite and neural crest marker proteins. The data were analyzed using event pairing to determine common developmental aspects and their relationship to life-history traits. In embryos of rapidly developing frogs, elongation of the notochord occured earlier relative to the time point of blastopore closure in comparison with slowly developing species. The development of cranial neural crest cell-streams relative to somite formation is accelerated in rapidly developing frogs, and it is delayed in slowly developing frogs. The timing of neural tube closure seemed to be temporally uncoupled with somite formation. We propose that these changes are achieved through differential timing of developmental modules that begin with the elongation of the notochord during gastrulation in the rapidly developing species. The differences might be related to the necessity of developing a free-living tadpole quickly in rapid devleopers.en_US
dc.facultyCiencias Exactas y Naturaleses
dc.id.author1700860479
dc.id.type1
dc.identifier.doi10.1073/pnas.1219307110
dc.identifier.issn00278424 - 10916490
dc.identifier.urihttps://repositorio.puce.edu.ec/handle/123456789/5621
dc.identifier.urihttp://www.pnas.org/content/109/50/20503.short
dc.indexed.databaseOtheres
dc.language.isoen
dc.list.authorsSáenz, N., Ponce, N., Mitgustsch, C., Del Pino, E.
dc.magazine.pageRange20503–20507
dc.magazine.titleProceedings of the National Academy of Sciences of the United States of Americaen_US
dc.magazine.volumeChapter109 (50)
dc.rightsClosedAccessen
dc.statepublisheden_US
dc.titleVariation in the schedules of somite and neural development in frogs.en_US
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