Developmental sources of conservation and variation in the evolution of the primate eye
| Autor: | Michael A. Dyer, Constance L. Cepko, José Augusto P. C. Muniz, Rodrigo A. P. Martins, Barbara L. Finlay, Manoel da Silva Filho, Luiz Carlos L. Silveira |
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| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
Mammalian eye
genetic structures Zoology Gene Expression Eye Retina Aotus azarae biology.animal medicine Animals Cebus Primate Phylogeny New World monkey Cell Proliferation Multidisciplinary biology Stem Cells Neurogenesis Cell Cycle Organ Size Biological Sciences biology.organism_classification Embryonic stem cell Biological Evolution medicine.anatomical_structure Evolutionary biology Cell Cycle Kinetics Aotidae sense organs |
| Popis: | Conserved developmental programs, such as the order of neurogenesis in the mammalian eye, suggest the presence of useful features for evolutionary stability and variability. The owl monkey, Aotus azarae , has developed a fully nocturnal retina in recent evolution. Description and quantification of cell cycle kinetics show that embryonic cytogenesis is extended in Aotus compared with the diurnal New World monkey Cebus apella. Combined with the conserved mammalian pattern of retinal cell specification, this single change in retinal progenitor cell proliferation can produce the multiple alterations of the nocturnal retina, including coordinated reduction in cone and ganglion cell numbers, increase in rod and rod bipolar numbers, and potentially loss of the fovea. |
| Databáze: | OpenAIRE |
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