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A study of the reappearance of melanophores and the formation of melanophore aggregations (spots) in regenerated ventral skin of the common newt, triturus viridescens
Author(s) -
Apgar Bessie Dickerson
Publication year - 1935
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.1050580206
Subject(s) - chromatophore , melanophore , biology , epidermis (zoology) , triturus , black spot , anatomy , dermis , spots , regeneration (biology) , microbiology and biotechnology , botany , fishery , horticulture
Studies of regeneration in a denuded area 3 to 5 mm. square made by dissecting away the epidermis and underlying dermis were carried out both in the living animal and with the aid of histological sections. During the reconstitution of the area pigmented cells appeared in the new epidermis. There was no evidence that they wandered in from the surrounding epidermis. They developed in situ and most of them later disappeared. In the deeper tissues of the regenerating area, pigmented cells appeared in localized areas which gradually increased in size and density of color and formed typical black spots. These remained permanently. If the incision passed through or close to an original spot there was migration of melanophores into the adjacent territory and the subsequent formation of a spot. All other new spots were formed from melanophores which appeared in situ, by the formation of pigment in cells which had previously been unpigmented.