The "third eye"-- a new concept of trans-differentiation of pineal gland into median eye in amphibian tadpoles of Bufo melanostictus.
Indian J Exp Biol
;
2005 Aug; 43(8): 671-8
Article
in English
| IMSEAR
| ID: sea-57472
ABSTRACT
Median third eye was found to develop from transplanted pineal gland of external gill stage tadpoles in the recipient 5 toe stage tadpoles of Bufo melanostictus. Pineal gland along with a bit part of brain tissue of the donor external gill stage tadpole was cut out and transplanted into a pit made between two lateral eyes of 5 toe stage recipient tadpoles. Half of the operated tadpoles were treated with vitamin A (15 IU/ml.) for 15 days. Median "third eye" was found to develop in the both untreated and vitamin A treated tadpoles. However, vitamin A increased the percentage of the development of median eyes. Morphological and histological study revealed that newly transformed median eyes were similar to that of normal functional eyes. A stalk like structure developed which connects the median eye to the brain. The median third eye could not develop when pineal gland of 5 toe stage mature tadpole was transplanted into the tadpole of the same age.
Full text:
Available
Index:
IMSEAR (South-East Asia)
Main subject:
Pineal Gland
/
Vitamin A
/
Bufonidae
/
Eye
/
Larva
/
Animals
/
Morphogenesis
Language:
English
Journal:
Indian J Exp Biol
Year:
2005
Type:
Article
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