Effect of vitamin A excess on oral armature in tadpoles of toad, Bufo melanostictus (Schneider) and frog, Rana cyanophlyctis (Schneider).
Tadpoles of B. melanostictus and R. cyanophlyctis were reared in vitamin A solution. Rearing of the tadpoles of B. melanostictus in solutions containing 15, 20 and 30 IU/ml vitamin A palmitate resulted in complete disappearance of the keratinized epidermal material over the jaws and horny labial teeth. However tadpoles of the frog R. cyanophlyctis, were not affected in this way.
Department of Zoology, Dungar College, Bikaner, India.
O P
OP
Jangir
A K
AK
Sharma
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KC
Soni
D000818:Animals; D002025:Bufonidae / Q000254:growth & development*; D004224:Diterpenes; D007568:Jaw / Q000187:drug effects*; D007814:Larva / Q000187:drug effects; D011898:Ranidae / Q000254:growth & development*; D000084562:Retinyl Esters; D014801:Vitamin A / Q000031:analogs & derivatives* / Q000633:toxicity
D004224:Diterpenes; D000084562:Retinyl Esters; D014801:Vitamin A; C014794:retinol palmitate