Comparative Histolab and Department of Bigea, Dipartimento di Biologia, University of Bologna, Bologna 40126, Italy.
Research Institute of Luminous Organisms, Tokyo 100-1623, Japan; Department of Genetics and Physiology, Oulu University, Oulu, FIN 90140, Finland.
Zool Res. 2017 Jul 18;38(4):191-197. doi: 10.24272/j.issn.2095-8137.2017.046.
During the regeneration of the tail in the arboreal New Zealand gecko () a new set of tail scales, modified into pads bearing setae 5-20 μm long, is also regenerated. Stages of the formation of these specialized scales from epidermal pegs that invaginate the dermis of the regenerating tail are described on the basis of light and electron microscopic images. Within the pegs a differentiating clear layer interfaces with the spinulae and setae of the Oberhäutchen according to a process similar to that described for the digital pads. A layer of clear cytoplasm surrounds the growing tiny setae and eventually cornifies around them and their spatular ends, later leaving the new setae freestanding on the epidermal surface. The fresh adhesive pads help the gecko to maintain the prehensile function of its regenerated tail as together with the axial skeleton (made of a cylinder of elastic cartilage) the pads allow the regenerated tail to curl around twigs and small branches just like the original tail. The regeneration of caudal adhesive pads represents an ideal system to study the cellular processes that determine setal formation under normal or experimental manipulation as the progressive phases of the formation of the setae can be sequentially analyzed.
在树栖新西兰蜥蜴（）的尾巴再生过程中，还会再生出一套新的尾巴鳞片，这些鳞片经过改造成为带有 5-20 微米长刚毛的垫子。本文基于光镜和电镜图像，描述了这些特殊鳞片从表皮钉突向内陷真皮的表皮突起形成的过程。在钉突内，一个分化的透明层与 Oberhäutchen 的刺突和刚毛相接，这个过程类似于描述的指垫形成过程。一层透明细胞质围绕着正在生长的微小刚毛，并最终围绕着它们及其叶状末端角质化，随后新的刚毛在表皮表面自由生长。这些新的粘性垫子有助于蜥蜴维持其再生尾巴的抓握功能，因为与轴向骨骼（由弹性软骨圆柱体组成）一起，这些垫子可以使再生的尾巴像原始尾巴一样缠绕在小树枝和小树枝上。尾部长出粘性垫代表了一个理想的系统，可以用来研究在正常或实验操作下决定刚毛形成的细胞过程，因为可以依次分析刚毛形成的各个阶段。
