Gastrulation of Gastrotheca riobambae in comparison with other frogs

Moya, Iván M.; Alarcón, Ingrid; Pino, Eugenia M. del

doi:10.1016/j.ydbio.2006.12.036

Cited by 27 publications

(67 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…2B). In contrast, an embryonic disk was not found in the gastrula of the dendrobatid frogs C. machalilla and E. anthonyi (7). The involuted cells, however, accumulated in the blastopore lip and formed a large CBC (Fig.…”

Section: Resultsmentioning

confidence: 95%

“…Thereafter, bottle cells occur on the dorsal side, before the formation of the faint dorsal lip of the blastopore (7). In contrast, the delimitation of the blastopore is gradual in embryos of X. laevis and of the dendrobatid frog, Colostethus machalilla (7,10).…”

mentioning

confidence: 95%

“…This pattern resembles development of the chick, although the G. riobambae embryos have holoblastic cleavage and form a blastopore with involution at the lip of the blastopore (5,6). At the onset of gastrulation [stage (st) 10], the blastoporal rim develops around the future yolk plug (7). This feature has not been described for other frogs.…”

mentioning

confidence: 99%

“…The cells that involuted during gastrulation remain in the blastopore lip, which consequently thickens to form a large CBC and embryonic disk (7). In X. laevis, in contrast, CE movements begin in the midgastrula.…”

mentioning

confidence: 99%

“…Moreover, CE occurs after blastopore closure, as in G. riobambae but without formation of an embryonic disk. In contrast, elongation of the archenteron begins in the midgastrula (7,19,20). It is of interest to know whether the gastrulation pattern is altered in dendrobatid frogs with much larger eggs.…”

mentioning

confidence: 99%

See 4 more Smart Citations

A comparative analysis of frog early development

Pino

Venegas-Ferrín

Romero‐Carvajal

et al. 2007

Proc. Natl. Acad. Sci. U.S.A.

Self Cite

View full text Add to dashboard Cite

The current understanding of Xenopus laevis development provides a comparative background for the analysis of frog developmental modes. Our analysis of development in various frogs reveals that the mode of gastrulation is associated with developmental rate and is unrelated to egg size. In the gastrula of the rapidly developing embryos of the foam-nesting frogs Engystomops coloradorum and Engystomops randi, archenteron and notochord elongation overlapped with involution at the blastopore lip, as in X. laevis embryos. In embryos of dendrobatid frogs and in the frog without tadpoles Eleutherodactylus coqui, which develop somewhat more slowly than X. laevis, involution and archenteron elongation concomitantly occurred during gastrulation; whereas elongation of the notochord and, therefore, dorsal convergence and extension, occurred in the postgastrula. In contrast, in the slow developing embryos of the marsupial frog Gastrotheca riobambae, only involution occurred during gastrulation. The processes of archenteron and notochord elongation and convergence and extension were postgastrulation events. We produced an Ab against the homeodomain protein Lim1 from X. laevis as a tool for the comparative analysis of development. By the expression of Lim1, we were able to identify the dorsal side of the G. riobambae early gastrula, which otherwise was difficult to detect. Moreover, the Lim1 expression in the dorsal lip of the blastopore and notochord differed among the studied frogs, indicating variation in the timing of developmental events. The variation encountered gives evidence of the modular character of frog gastrulation.Brachyury ͉ Gastrotheca ͉ Lim1

show abstract

Section: Resultsmentioning

confidence: 95%

mentioning

confidence: 95%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

A comparative analysis of frog early development

Pino

Venegas-Ferrín

Romero‐Carvajal

et al. 2007

Proc. Natl. Acad. Sci. U.S.A.

Self Cite

View full text Add to dashboard Cite

show abstract

Embryogenesis and laboratory maintenance of the foam‐nesting túngara frogs, genus Engystomops (= Physalaemus)

Romero‐Carvajal

Sáenz-Ponce

Venegas-Ferrín

et al. 2009

Developmental Dynamics

Self Cite

View full text Add to dashboard Cite

The vast majority of embryological research on amphibians focuses on just a single genus of frogs, Xenopus. To attain a more comprehensive understanding of amphibian development, experimentation on non-model frogs will be essential. Here, we report on the early development, rearing, and embryological analysis of tú ngara frogs (genus Engystomops, also called Physalaemus). The frogs Engystomops pustulosus, Engystomops coloradorum, and Engystomops randi construct floating foam-nests with small eggs. We define a table of 23 stages for the developmental period in the foam-nest. Embryos were immunostained against Lim1, neural, and somite-specific proteins and the expression pattern of RetinoBlastoma Binding Protein 6 (RBBP6) was analyzed by in situ hybridization. Due to their brief life-cycle, frogs belonging to the genus Engystomops are attractive for comparative and genetic studies of development.

show abstract

Morphogenic machines evolve more rapidly than the signals that pattern them: lessons from amphibians

Shook

Keller

2007

J Exp Zool Pt B

View full text Add to dashboard Cite

The induction of mesoderm and the patterning of its dorsal-ventral and anterior-posterior axes seems to be relatively conserved throughout the chordates, as do the morphogenic movements that produce a phylotypic stage embryo. What is not conserved is the initial embryonic architecture of the fertilized egg, and the specific cell behaviors used to drive mesoderm morphogenesis. How then do conserved patterning pathways adapt to diverse architectures and where do they diverge to direct the different cell behaviors used to shape the phylotypic body plan? Amphibians in particular, probably because of their broad range of reproductive strategies, show diverse embryonic architectures across their class and use diverse cell behaviors during their early morphogenesis, making them an interesting comparative group. We examine three examples from our work on amphibians that show variations in the use of cell behaviors to drive the morphogenesis of the same tissues. We also consider possible points where the conserved patterning pathways might diverge to produce different cell behaviors.

show abstract

Gastrulation of Gastrotheca riobambae in comparison with other frogs

Cited by 27 publications

References 33 publications

A comparative analysis of frog early development

A comparative analysis of frog early development

Embryogenesis and laboratory maintenance of the foam‐nesting túngara frogs, genus Engystomops (= Physalaemus)

Morphogenic machines evolve more rapidly than the signals that pattern them: lessons from amphibians

Contact Info

Product

Resources

About