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Dorsal dermis of the scaleless ( sc/sc ) embryo directs normal feather pattern formation until day 8 of development
Author(s) -
Song Hee Kyung,
Sawyer Roger H.
Publication year - 1996
Publication title -
developmental dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.634
H-Index - 141
eISSN - 1097-0177
pISSN - 1058-8388
DOI - 10.1002/(sici)1097-0177(199601)205:1<82::aid-aja8>3.0.co;2-1
Subject(s) - dermis , feather , biology , embryo , epidermis (zoology) , anatomy , incubation , dorsum , embryogenesis , microbiology and biotechnology , zoology , biochemistry
We have examined the ability of the scaleless ( sc/sc ) backskin dermis (6 to 16 daysof incubation) to regulate pattern formation using the presumptive scutate scale epidermis from11‐day normal embryos as the responding tissue. Prior to 8 days of incubation the sc/sc backskin dermis is able to induce hexagonally patterned and uniformly oriented feather germs innormal epidermis. This ability is lost during day 8 and follows a central to lateral gradient. Suchgradients are characteristic of normal feather development in the spinal tract. We discuss thechange in the inductive ability of the sc/sc dermis in relation to the stabilization of thefeather pattern, which occurs all at once throughout the dorsal dermis at 7.5–8 days ofdevelopment. After day 8 until day 10, the sc/sc backskin dermis only supports theformation of sporadic, unpatterned feather germs; thereafter it will not support feather formation.© 1996 Wiley‐Liss, Inc.