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Cell interactions in barb ridges of developing chick downfeather and the origin of feather branching

Published on Jun 1, 2007in Italian Journal of Zoology1.12
· DOI :10.1080/11250000701246674
L. Alibardi4
Estimated H-index: 4
(UNIBO: University of Bologna)
Abstract
The epidermis of developing feathers comprises outer and inner periderm, subperiderm and germinal layer. The inner periderm gives origin to sheath and barb ridge vane cells that contain alpha‐keratin and form a belt around feather filaments. This produces mechanical resistance, forcing the inner epidermal cell layers to fold inward and form barb ridges. Mesenchymal‐epidermal contacts occur from the mesenchymal core to external regions of barb ridges and involve thin cytoplasmic processes (filopodia) from mesenchymal cells. Subperiderm cells produce feather keratin that remains in derived barb and barbule cells displaced into two barbule plates and a ramus. Barb medullary cells undergo lipid degeneration while barbule cells accumulate feather keratin and cornify. Supporting cells surround barb and barbule cells and later degenerate leaving separate barbules, while marginal plate cells disappear leaving separate barbs. Caspase‐3, a marker for apoptosis, is absent in cells of barb ridges. Degenerating cells ...
  • References (33)
  • Citations (13)
References33
Newest
#1Roger H. Sawyer (USC: University of South Carolina)H-Index: 30
#2Loren Rogers (USC: University of South Carolina)H-Index: 1
Last.Loren W. Knapp (USC: University of South Carolina)H-Index: 17
view all 5 authors...
#1Randall B. Widelitz (SC: University of Southern California)H-Index: 40
#2Ting Xin Jiang (SC: University of Southern California)H-Index: 17
Last.Cheng-Ming Chuong (SC: University of Southern California)H-Index: 61
view all 8 authors...
Cited By13
Newest
#1Lida Xing (China University of Geosciences)H-Index: 18
#2Ryan C. McKellar (University of Regina)H-Index: 5
Last.Alexander P. Wolfe (U of A: University of Alberta)H-Index: 47
view all 14 authors...
#1Lorenzo Alibardi (UNIBO: University of Bologna)H-Index: 27
#2Ping Wu (SC: University of Southern California)H-Index: 23
Last.Cheng-Ming Chuong (SC: University of Southern California)H-Index: 61
view all 3 authors...
#1Paul F. A. Maderson (Brooklyn College)H-Index: 20
#2Willem J. Hillenius (CofC: College of Charleston)H-Index: 13
Last.Carla C. Dove (Smithsonian Institution)H-Index: 1
view all 4 authors...
View next paperCell structure of developing barbs and barbules in downfeathers of the chick: Central role of barb ridge morphogenesis for the evolution of feathers.