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Tolerance, limb regeneration and collagen fibrogenesis under high oxygen concentrations by the adult newt, Diemictylus viridescens by Anthony J. Schmidt; Laura G. Jasch is a Environmental Science article available to read on EtoBox.

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## Abstract Adult newts placed in an atmospheric environment of 85% oxygen, saturated humidity, and at a temperature of 20 ± 1°C survived particularly well a 44‐day test period. They did not succumb to “oxygen toxicity” as has been frequently reported for other vertebrate species. Having established the newt's tolerance of high oxygen atmosphere, the effect of oxygen on growth and development in the regenerating newt limb was investigated. Under the atmospheric conditions described above, and under 92% oxygen, the regeneration of adult newt limbs appeared to be retarded during the first 25 days after amputation when compared with regenerating limbs of control animals kept under a normal atmosphere of 21% oxygen (air). Thereafter, little or no difference could be discerned between the regeneration of experimental and control limbs. It is known that molecular oxygen participates directly in the hydroxylation of proline to hydroxyproline in the synthesis of collagen. Sectioned regenerates stained specifically for collagen were examined to determine if collagen synthesis was induced in experimental animals. Two regeneration‐inhibited limbs of oxygenated newts showed cicatrical repair o

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Author

Anthony J. Schmidt; Laura G. Jasch

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0362-2525)

Published

1971

Language

EN

Field

Environmental Science (Physical Sciences)