AVIAN SCALE DEVELOPMENT .3. ULTRASTRUCTURE OF KERATINIZING CELLS OF OUTER AND INNER EPIDERMAL SURFACES OF SCALE RIDGE
AVIAN SCALE DEVELOPMENT .3. ULTRASTRUCTURE OF KERATINIZING CELLS OF OUTER AND INNER EPIDERMAL SURFACES OF SCALE RIDGE
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DOI：
10.1002/jez.1401900105
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发表时间：
1974-01-01
影响因子：
--
通讯作者：
FRY, GN
中科院分区：
文献类型：
--
作者：
SAWYER, RH;ABBOTT, UK;FRY, GN
角化的超微结构特征不同的内，外表皮表面的发展鸟类鳞片。只有α层沿着鳞片内表面发育，孵化后保留下来，并且仍然存在于成年鸟类中。α层细胞的特征是脂滴、多颗粒体和位于外周的透明角质颗粒。相反，外鳞表面的表皮发育α层和β层。α层在孵化后不久就消失了，只有β层在成熟的鸟中被发现。β层细胞内充满30束细丝，透明角质颗粒不存在。最外层的周皮和亚周皮细胞层沿鳞片的两个表皮表面沿着发育。这两个细胞层是胚胎期的特征，在孵化时丢失。
Ultrastructural features of keratinization differ for the inner and outer epidermal surfaces of developing avian scales. Only the alpha stratum develops along the inner scale surface, and it is retained after hatching and is still present in adult birds. The cells of the alpha stratum are characterized by lipid droplets, multigranular bodies, and peripherally located keratohyalin granules. In contrast, the epidermis of the outer scale surface develops both alpha and beta strata. The alpha stratum is lost soon after hatching and only the beta stratum is found in the mature bird. Bundles of 30 Å filaments fill the cells of the beta stratum and keratohyalin granules are not present. The outermost peridermal and subperidermal cell layers develop along both epidermal surfaces of the scale. These two cell layers are characteristic of the embryonic period and are lost at the time of hatching.