Cytological Aspects of the Differentiation of Barb Cells During the Formation of the Ramus of Feathers

The present ultrastructural study on developing and regenerating feathers of chick and zebrafinch describes the ultrastructural changes that occur during the differentiation of barb cells that leads to the formation of the ramus of barbs. Differently from barbule and barb cortical cells that accumul...

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Autor principal:	Alibardi,Lorenzo
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2007
Materias:	Feathers Barbs Differentiation Lipidization Ultrastructure
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022007000100010
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spelling	oai:scielo:S0717-950220070001000102007-07-26Cytological Aspects of the Differentiation of Barb Cells During the Formation of the Ramus of FeathersAlibardi,Lorenzo Feathers Barbs Differentiation Lipidization Ultrastructure The present ultrastructural study on developing and regenerating feathers of chick and zebrafinch describes the ultrastructural changes that occur during the differentiation of barb cells that leads to the formation of the ramus of barbs. Differently from barbule and barb cortical cells that accumulate feather keratin, barb medullary cells undergo to lipid degeneration. Eventually, lipids disappear and medullary cells become empty cavities in the central part of the ramus. In barb medullary cells feather keratin is accumulated in few peripheral bundles that merge with those of cortical cells to fom the wall of the ramus. The latter is joined with branching barbules. The process that controls the transition from keratin-synthesizing to lipid-producing barb cells remains unknown. The accumulation of lipids among keratin bundles confirms the capability of beta-keratin cells to undergo an intense lipidogenesis under specific conditionsinfo:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.25 n.1 20072007-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022007000100010en10.4067/S0717-95022007000100010
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Feathers Barbs Differentiation Lipidization Ultrastructure
spellingShingle	Feathers Barbs Differentiation Lipidization Ultrastructure Alibardi,Lorenzo Cytological Aspects of the Differentiation of Barb Cells During the Formation of the Ramus of Feathers
description	The present ultrastructural study on developing and regenerating feathers of chick and zebrafinch describes the ultrastructural changes that occur during the differentiation of barb cells that leads to the formation of the ramus of barbs. Differently from barbule and barb cortical cells that accumulate feather keratin, barb medullary cells undergo to lipid degeneration. Eventually, lipids disappear and medullary cells become empty cavities in the central part of the ramus. In barb medullary cells feather keratin is accumulated in few peripheral bundles that merge with those of cortical cells to fom the wall of the ramus. The latter is joined with branching barbules. The process that controls the transition from keratin-synthesizing to lipid-producing barb cells remains unknown. The accumulation of lipids among keratin bundles confirms the capability of beta-keratin cells to undergo an intense lipidogenesis under specific conditions
author	Alibardi,Lorenzo
author_facet	Alibardi,Lorenzo
author_sort	Alibardi,Lorenzo
title	Cytological Aspects of the Differentiation of Barb Cells During the Formation of the Ramus of Feathers
title_short	Cytological Aspects of the Differentiation of Barb Cells During the Formation of the Ramus of Feathers
title_full	Cytological Aspects of the Differentiation of Barb Cells During the Formation of the Ramus of Feathers
title_fullStr	Cytological Aspects of the Differentiation of Barb Cells During the Formation of the Ramus of Feathers
title_full_unstemmed	Cytological Aspects of the Differentiation of Barb Cells During the Formation of the Ramus of Feathers
title_sort	cytological aspects of the differentiation of barb cells during the formation of the ramus of feathers
publisher	Sociedad Chilena de Anatomía
publishDate	2007
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022007000100010
work_keys_str_mv	AT alibardilorenzo cytologicalaspectsofthedifferentiationofbarbcellsduringtheformationoftheramusoffeathers
_version_	1718444596595261440

Cytological Aspects of the Differentiation of Barb Cells During the Formation of the Ramus of Feathers

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