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Title: The ‘‘Third Eye’’— A new concept of trans-differentiation of pineal gland into median eye in amphibian tadpoles of Bufo melanostictus
Authors: Jangir, O P
Suthar, P
Shekhawat, DVS
Acbarya, P
Swami, K K
Sharma, Manshi
Keywords: Bufo melanostictus;Pineal gland;Trans-differentiation;Third eye;Vitamin A
Issue Date: Aug-2005
Publisher: NISCAIR-CSIR, India
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.
Page(s): 671-678
ISSN: 0975-1009 (Online); 0019-5189 (Print)
Appears in Collections:IJEB Vol.43(08) [August 2005]

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