The effect of excess vitamin A on tail regeneration in the Rana Ridibunda frog larvae
Other Title(s)
تأثير فيتامين أ الزائد على عملية تجديد الذيل في يرقات الضفدع
Author
Source
Zarka Journal for Research and Studies
Issue
Vol. 1, Issue 1 (30 Jun. 1999), pp.1-11, 11 p.
Publisher
Zarka Private University Deanship of Scientific Research and Graduate Studies
Publication Date
1999-06-30
Country of Publication
Jordan
No. of Pages
11
Main Subjects
Abstract EN
The effect of different concentrations of vitamin A palmitate (2.5, 5, 7.5 and 10 IU/ ml water) on tail regeneration in stages II, IV, VI, VIII, X and XII of Rana ridibunda larvae was investigated.
Stage VI was chosen for further treatment with higher concentrations of vitamin A palmitate to determine the lethal dose of excess vitamin A, which was found to be more than 12 IU vitamin A/ml water for 12 days.
The inhibitory effect of excess vitamin A on tail regeneration of all stages, was dose-dependent.
As the stage of development progresses, the inhibitory action of vitamin A on tail regeneration decreases.
The highest percentage of inhibition (84.2%) was recognized in stage II larvae treated with 10 IU vitamin A/ml water, while the lowest percentage (6.5%) was recognized in stage XII larvae that were treated with 2.5 IU vitamin A /ml water.
Morphologically, there was a clear difference between tail regenerates in control and treated larvae, where it appeared in the latter very short and with little pigmentation.
American Psychological Association (APA)
al-Aqtam, Musa Tawfiq. 1999. The effect of excess vitamin A on tail regeneration in the Rana Ridibunda frog larvae. Zarka Journal for Research and Studies،Vol. 1, no. 1, pp.1-11.
https://search.emarefa.net/detail/BIM-168220
Modern Language Association (MLA)
al-Aqtam, Musa Tawfiq. The effect of excess vitamin A on tail regeneration in the Rana Ridibunda frog larvae. Zarka Journal for Research and Studies Vol. 1, no. 1 (Jun. 1999), pp.1-11.
https://search.emarefa.net/detail/BIM-168220
American Medical Association (AMA)
al-Aqtam, Musa Tawfiq. The effect of excess vitamin A on tail regeneration in the Rana Ridibunda frog larvae. Zarka Journal for Research and Studies. 1999. Vol. 1, no. 1, pp.1-11.
https://search.emarefa.net/detail/BIM-168220
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 9-10
Record ID
BIM-168220