Bibliographic Citation
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Title | X-RAY EFFECTS ON EMBRYOS OF THE PARADISE FISH, WITH NOTES ON NORMAL STAGES |
Creator/Author | Allen, L.A. ; Mulkay, L.M. |
Publication Date | 1960 Jan 01 |
OSTI Identifier | OSTI ID: 4843753 |
Other Number(s) | CODEN: GROWA; 0017-4793 |
Resource Type | Journal Article |
Resource Relation | Growth (U.S.); Vol: 24 |
Research Org | Brigham Young Univ., Provo, Utah |
Subject | BIOLOGY AND MEDICINE; ANIMAL CELLS; EMBRYOS; FISH; MALFORMATIONS; MITOSIS; RADIATION EFFECTS; RADIATION INJURIES; RECOVERY; REGENERATION; TISSUES; X RADIATION |
Description/Abstract | Embryos of the paradise fish were exposed to x rays at different stages of development. Histologic studies were made of several selected organ systems in order to determine the stages at which particular anomalies might be induced. In each organ system certain anomalies were characteristically produced by irradiation at specific developmental stages. In most cases the abnormalities were induced by exposure prior to visible differentiation of the anlagen of the affected structures. Both susceptibility to radiation damage and the ability to regenerate from the damaged condition are directly proportional to the mitotic index of the tissues at the time of and following exposure. Differentiation processes are also susceptible to damage but, when unaccompanied by active mitosis, have less regenerative capacity. Some notes on normal development are also presented. Macropodus differs from the typical teleostean patterns of development in the ear and the gut. The otocyst arises by cavitation of a cranial crest mass which is attached to neutral ectoderm. The gut lumen forms by cavitation of a longitudinal rod of cells rather than by ventral folding of an entodermal plate. (auth) |
Language | English |
Format | Pages: 131-68 |
System Entry Date | 2001 Jun 03 |
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