Analysis of cell size in the gastrula of ten frog species reveals a correlation of egg with cell sizes, and a conserved pattern of small cells in the marginal zone

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dc.careerCiencias Biológicases
dc.category.authorprincipalen_US
dc.contributor.authorDel Pino Veintimilla, Eugenia; Vargas, Alexandra
dc.contributor.correspondingDel Pino Veintimilla, Eugenia
dc.countryEcuadores
dc.date.accessioned2023-11-04T21:46:25Z
dc.date.available2023-11-04T21:46:25Z
dc.date.issued2016-07-10
dc.dedication.authorTCes
dc.description.abstractWe investigated the relationship between egg and cell sizes in the early gastrula of ten species of frogs with eggs of 1,100-3,500 μm diameters. We asked whether differences in cell size of the vegetal region, blastocoel roof, and marginal zone of the early gastrula were associated with egg size. Alternatively, we proposed that cell size differences may associate with gastrulation characteristics. The analyzed species were as follows: Xenopus laevis, Engystomops randi, Engystomops coloradorum, Espadarana callistomma, Epipedobates machalilla, Epipedobates anthonyi, Epipedobates tricolor, Dendrobates auratus, Gastrotheca riobambae, and Eleutherodactylus coqui. A positive correlation between egg and cell size was detected in the three regions of the gastrula. The correlation was strong in the vegetal region and blastocoel roof, and weak in the marginal zone. Large eggs allowed the evolution of frog terrestrial reproductive modes by storing nourishment for the developing embryos. Large cells, laden with yolk, occur in the vegetal region. However, small cell size characterized the marginal zone and blastocoel roof. We proposed that small cells of the marginal zone are required for involution and blastopore formation. The evolution pressure toward small cells in the marginal zone contributed to maintain the blastopore as a universal feature of frog gastrulation in eggs of different sizes and gastrulation modes. Our comparative analysis revealed two fundamental and conserved properties of the frog early gastrula, the correlation of egg with cell sizes, and the general small size of cells in the marginal zone.en_US
dc.facultyCiencias Exactas y Naturaleses
dc.id.author1700860479
dc.id.type1
dc.identifier.doi10.1002/jez.b.22685.
dc.identifier.issn0022-104X
dc.identifier.urihttps://repositorio.puce.edu.ec/handle/123456789/6136
dc.identifier.urihttps://www.ncbi.nlm.nih.gov/pubmed/27381278
dc.indexed.databaseScimago Journal Rankes
dc.language.isoen
dc.list.authorsVargas, A., Del Pino, E.
dc.magazine.pageRange1-9
dc.magazine.titleJournal of Experimental Zoologyen_US
dc.magazine.volumeChapter3 (3)
dc.rightsClosedAccessen
dc.statepublisheden_US
dc.subjectTécnicas de Cultivoes
dc.subjectCitologíaes
dc.subjectGenética Animales
dc.subjectRanases
dc.subjectTécnicas de Cultivo
dc.subjectCitología
dc.subjectGenética Animal
dc.subjectRanas
dc.titleAnalysis of cell size in the gastrula of ten frog species reveals a correlation of egg with cell sizes, and a conserved pattern of small cells in the marginal zoneen_US
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