Metamorphic competence in urodeles: Observations on the induction of gill resorption and its relationship to acid phosphatase

Benson, Don G.

doi:10.1016/0016-6480(72)90013-5

Cited by 6 publications

(3 citation statements)

References 6 publications

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“…It has been known for many years that amphibian tadpoles at the premetamorphic stage have a low activity of thyroid hormone and the larval tissues exhibit a metamorphic response following treatment with thyroid or thyrotropic (TSH) hormone in anurans (Kollros, 1961;Tata, 1968) and in urodeles (Prahlad and DeLanney 1965;Zalta and Beetschen, 1965;Benson, 1972;Hackford et al, 1977). As regards the mechanism of initiation of epithelial cell death, thyroid hormone cannot be excluded as the dominant factor in the control of external gill degeneration.…”

Section: Degenerating Gill Epitheliummentioning

confidence: 99%

“…There are no reports, insofar as we are aware, concerning cellular changes in the gill epithelium of larval salamanders during physiological metamorphosis. Thus, little is yet known about the ultrastructural and histochemical changes occurring in the gill epithelium of salamanders, although histochemical and biochemical information is available on the acid phosphatase activity in the degenerating gill epithelium of the anuran, Rana pipiens (Michaels et al, 1971;Benson, 1972). It is thus of interest to examine the cellular changes which take place in the gill epithelium of larval salamanders and to observe how their epithelial cells disappear during the metamorphic stage.…”

mentioning

confidence: 99%

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Electron Microscopic Studies of the External Gill Epithelium of the Salamander, Hynobius dunni Tago, Followed Throughout Larval Life

Kato

Kurihara

1988

Okajimas Folia Anatomica Japonica

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Section: Degenerating Gill Epitheliummentioning

confidence: 99%

mentioning

confidence: 99%

Electron Microscopic Studies of the External Gill Epithelium of the Salamander, Hynobius dunni Tago, Followed Throughout Larval Life

Kato

Kurihara

1988

Okajimas Folia Anatomica Japonica

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“…The ultrastructural changes in the gill epithelium have extensively been studied with special reference to metamorphosis (Prahlad and DeLanney, 1965;Michaels et al, 1971;Benson, 1972;Hourdry, 1974;Hackford et al, 1977;Kato and Kurihara, 1988). However, there are no reports concerned with spatial arrangements of blood vessels and their changes in amphibian gills during metamorphosis.…”

mentioning

confidence: 99%

The Blood Vascular Architecture of the Salamander External Gill: A Scanning Electron Microscopic study of Corrosion Casts

Kato

Kurihara

1989

Okajimas Folia Anatomica Japonica

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The blood vascular architecture in three-paired external gills of salamander tadpoles, Hynobius dunni Tago, was demonstrated with special reference to metamorphosis by scanning electron microscopy of vascular corrosion casts. In the fully developed gill, each of the three-paired afferent branchial arteries gave off secondary afferent filament arterioles. The afferent filament arteriole drained toward the efferent filament arteriole, forming the loop at the posterior extremity of the gill filament. The branched capillaries from the afferent filament arteriole formed two plates of respiratory capillary networks with irregular honeycomb-shaped meshes. In addition, there were non-respiratory shunts as bypass of the blood circulation between the afferent and efferent branchial arteries without branching filament arterioles. Furthermore, the deep venous plexus and subepithelial capillary plexus were seen around each efferent branchial artery. The filament central venule in the central part of the filament merged into the venous plexus. Nutritive capillaries branched from efferent branchial arteries also drained toward the venous plexus. Such general vascular architecture is simpler than that of the fish. During metamorphosis, the pattern of the vascular distribution, especially filament net capillaries became irregular, and then markedly tortuous or convoluted blood vessels occurred in the absorbing gill. At the metamorphic climax, the capillary network practically disappeared in the remnant of the gill but the bypass shunt as a non-respiratory artery remained almost unchanged.

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Changes in the tail of Ambystoma maculatum at different stages of metamorphosis: Observations on tissue remodeling and its relationship to hydrolytic enzymes

Derby

McEldoon

1976

J. Exp. Zool.

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A system for staging A. maculatum during growth and metamorphosis was devised, based on several parameters of body size; body length, tail length and tail width. Animals at various stages of metamorphosis were employed to study the relationship between specific biochemical and histological changes that occur in the tail of this urodele during metamorphosis. The specific and total activity of two hydrolytic enzymes, acid phosphatase and beta-N-acetyl-glucosaminidase, were measured in tail tissues at progressive stages of development. The activities of these enzymes increased in both the fins and muscular portion of the tail during metamorphosis. These activities can be correlated with resorption of the tail fins and the remodeling of tissues in the muscular portion of the tail.

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Metamorphic competence in urodeles: Observations on the induction of gill resorption and its relationship to acid phosphatase

Cited by 6 publications

References 6 publications

Electron Microscopic Studies of the External Gill Epithelium of the Salamander, Hynobius dunni Tago, Followed Throughout Larval Life

Electron Microscopic Studies of the External Gill Epithelium of the Salamander, Hynobius dunni Tago, Followed Throughout Larval Life

The Blood Vascular Architecture of the Salamander External Gill: A Scanning Electron Microscopic study of Corrosion Casts

Changes in the tail of Ambystoma maculatum at different stages of metamorphosis: Observations on tissue remodeling and its relationship to hydrolytic enzymes

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