Macrophage-like cells in the tail mesenchyme of bullfrog tadpoles were isolated and characterized. These cells actively ingested latex beads into their perinuclear cytoplasm and thyroid hormone was essential for their survival in vitro. The requirement for this hormone is a unique property of these
Effect of complete tail amputation on the rate of metamorphosis in anuran tadpoles
โ Scribed by Kumar, T. Rajendra ;Krishanaprasadan, T. N. ;Kotak, V. C.
- Publisher
- John Wiley and Sons
- Year
- 1983
- Tongue
- English
- Weight
- 425 KB
- Volume
- 228
- Category
- Article
- ISSN
- 0022-104X
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โฆ Synopsis
Complete tail amputation enhanced the rate of metamorphosis threefold in the late prometamorphic tadpoles of Microhyla ornata and Rana tigrina. By contrast, premetamorphic tadpoles after tail amputation showed no acceleration of metamorphosis; instead, they regenerated their tails. Both these events could be reflective of the strategies employed in the different stages to enhance survival value.
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Autolysis and heterolysis of the degenerating epidermis of the tail fin of Rana japonica tadpoles during spontaneous metamorphosis were observed by transmission and scanning electron microscopy. In the early climactic stages of metamorphosis (st. 19-20), the outermost epidermal cells developed vacuo