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A scanning electron microscopic and quantitative histologic description of lens regeneration in the newt, Notophthalmus viridescens

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Bibliographische Detailangaben
Zeitschriftentitel: Journal of Morphology
Personen und Körperschaften: Connelly, Thomas G.
In: Journal of Morphology, 158, 1978, 1, S. 31-40
Format: E-Article
Sprache: Englisch
veröffentlicht:
Wiley
Schlagwörter:
Developmental Biology
Animal Science and Zoology
author_facet Connelly, Thomas G.
Connelly, Thomas G.
author Connelly, Thomas G.
spellingShingle Connelly, Thomas G.
Journal of Morphology
A scanning electron microscopic and quantitative histologic description of lens regeneration in the newt, Notophthalmus viridescens
Developmental Biology
Animal Science and Zoology
author_sort connelly, thomas g.
spelling Connelly, Thomas G. 0362-2525 1097-4687 Wiley Developmental Biology Animal Science and Zoology http://dx.doi.org/10.1002/jmor.1051580104 <jats:title>Abstract</jats:title><jats:p>Adult newts (<jats:italic>Notophthalmus viridescens</jats:italic>) were lentectomized and at intervals from 4 to 21 days after lentectomy iridocorneal complexes from these animals were examined by scanning electron microscopy to allow a full appreciation for the shape of the regenerating lens. Until around day 12 after lentectomy the posterior surface of the iris is covered by a dense mat of fibrous material which cannot be removed without damage to the iris and which obscures the events of cytoplasmic shedding. The regenerate becomes visible first around stage IV (day 12). A small but clear groove demarcates the regenerate from the rest of the iris. As regeneration progresses there is a marked reduction in debris on the iris surface and the regenerate appears as a U‐shaped thickening occupying about one‐third of the dorsal half of the iris. During later stages (VI–X) the regenerate protrudes into the pupil inferiorly and posteriorly towards the retina, but does not encroach laterally on the remaining pigmented iris tissue. Prior to secretion of the lens capsule the outline of individual cells is visible on the surface of the regenerate and some regenerates exhibit a prominent dimple on their posterior aspects. Following secretion of the capsule the surface of the regenerate becomes smooth. Quantitative studies show that volume and maximum section area of the regenerate are both more strongly correlated with developmental stage of regeneration than with time after lentectomy.</jats:p> A scanning electron microscopic and quantitative histologic description of lens regeneration in the newt, <i>Notophthalmus viridescens</i> Journal of Morphology
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series Journal of Morphology
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title A scanning electron microscopic and quantitative histologic description of lens regeneration in the newt, Notophthalmus viridescens
title_unstemmed A scanning electron microscopic and quantitative histologic description of lens regeneration in the newt, Notophthalmus viridescens
title_full A scanning electron microscopic and quantitative histologic description of lens regeneration in the newt, Notophthalmus viridescens
title_fullStr A scanning electron microscopic and quantitative histologic description of lens regeneration in the newt, Notophthalmus viridescens
title_full_unstemmed A scanning electron microscopic and quantitative histologic description of lens regeneration in the newt, Notophthalmus viridescens
title_short A scanning electron microscopic and quantitative histologic description of lens regeneration in the newt, Notophthalmus viridescens
title_sort a scanning electron microscopic and quantitative histologic description of lens regeneration in the newt, <i>notophthalmus viridescens</i>
topic Developmental Biology
Animal Science and Zoology
url http://dx.doi.org/10.1002/jmor.1051580104
publishDate 1978
physical 31-40
description <jats:title>Abstract</jats:title><jats:p>Adult newts (<jats:italic>Notophthalmus viridescens</jats:italic>) were lentectomized and at intervals from 4 to 21 days after lentectomy iridocorneal complexes from these animals were examined by scanning electron microscopy to allow a full appreciation for the shape of the regenerating lens. Until around day 12 after lentectomy the posterior surface of the iris is covered by a dense mat of fibrous material which cannot be removed without damage to the iris and which obscures the events of cytoplasmic shedding. The regenerate becomes visible first around stage IV (day 12). A small but clear groove demarcates the regenerate from the rest of the iris. As regeneration progresses there is a marked reduction in debris on the iris surface and the regenerate appears as a U‐shaped thickening occupying about one‐third of the dorsal half of the iris. During later stages (VI–X) the regenerate protrudes into the pupil inferiorly and posteriorly towards the retina, but does not encroach laterally on the remaining pigmented iris tissue. Prior to secretion of the lens capsule the outline of individual cells is visible on the surface of the regenerate and some regenerates exhibit a prominent dimple on their posterior aspects. Following secretion of the capsule the surface of the regenerate becomes smooth. Quantitative studies show that volume and maximum section area of the regenerate are both more strongly correlated with developmental stage of regeneration than with time after lentectomy.</jats:p>
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author Connelly, Thomas G.
author_facet Connelly, Thomas G., Connelly, Thomas G.
author_sort connelly, thomas g.
container_issue 1
container_start_page 31
container_title Journal of Morphology
container_volume 158
description <jats:title>Abstract</jats:title><jats:p>Adult newts (<jats:italic>Notophthalmus viridescens</jats:italic>) were lentectomized and at intervals from 4 to 21 days after lentectomy iridocorneal complexes from these animals were examined by scanning electron microscopy to allow a full appreciation for the shape of the regenerating lens. Until around day 12 after lentectomy the posterior surface of the iris is covered by a dense mat of fibrous material which cannot be removed without damage to the iris and which obscures the events of cytoplasmic shedding. The regenerate becomes visible first around stage IV (day 12). A small but clear groove demarcates the regenerate from the rest of the iris. As regeneration progresses there is a marked reduction in debris on the iris surface and the regenerate appears as a U‐shaped thickening occupying about one‐third of the dorsal half of the iris. During later stages (VI–X) the regenerate protrudes into the pupil inferiorly and posteriorly towards the retina, but does not encroach laterally on the remaining pigmented iris tissue. Prior to secretion of the lens capsule the outline of individual cells is visible on the surface of the regenerate and some regenerates exhibit a prominent dimple on their posterior aspects. Following secretion of the capsule the surface of the regenerate becomes smooth. Quantitative studies show that volume and maximum section area of the regenerate are both more strongly correlated with developmental stage of regeneration than with time after lentectomy.</jats:p>
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imprint Wiley, 1978
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spelling Connelly, Thomas G. 0362-2525 1097-4687 Wiley Developmental Biology Animal Science and Zoology http://dx.doi.org/10.1002/jmor.1051580104 <jats:title>Abstract</jats:title><jats:p>Adult newts (<jats:italic>Notophthalmus viridescens</jats:italic>) were lentectomized and at intervals from 4 to 21 days after lentectomy iridocorneal complexes from these animals were examined by scanning electron microscopy to allow a full appreciation for the shape of the regenerating lens. Until around day 12 after lentectomy the posterior surface of the iris is covered by a dense mat of fibrous material which cannot be removed without damage to the iris and which obscures the events of cytoplasmic shedding. The regenerate becomes visible first around stage IV (day 12). A small but clear groove demarcates the regenerate from the rest of the iris. As regeneration progresses there is a marked reduction in debris on the iris surface and the regenerate appears as a U‐shaped thickening occupying about one‐third of the dorsal half of the iris. During later stages (VI–X) the regenerate protrudes into the pupil inferiorly and posteriorly towards the retina, but does not encroach laterally on the remaining pigmented iris tissue. Prior to secretion of the lens capsule the outline of individual cells is visible on the surface of the regenerate and some regenerates exhibit a prominent dimple on their posterior aspects. Following secretion of the capsule the surface of the regenerate becomes smooth. Quantitative studies show that volume and maximum section area of the regenerate are both more strongly correlated with developmental stage of regeneration than with time after lentectomy.</jats:p> A scanning electron microscopic and quantitative histologic description of lens regeneration in the newt, <i>Notophthalmus viridescens</i> Journal of Morphology
spellingShingle Connelly, Thomas G., Journal of Morphology, A scanning electron microscopic and quantitative histologic description of lens regeneration in the newt, Notophthalmus viridescens, Developmental Biology, Animal Science and Zoology
title A scanning electron microscopic and quantitative histologic description of lens regeneration in the newt, Notophthalmus viridescens
title_full A scanning electron microscopic and quantitative histologic description of lens regeneration in the newt, Notophthalmus viridescens
title_fullStr A scanning electron microscopic and quantitative histologic description of lens regeneration in the newt, Notophthalmus viridescens
title_full_unstemmed A scanning electron microscopic and quantitative histologic description of lens regeneration in the newt, Notophthalmus viridescens
title_short A scanning electron microscopic and quantitative histologic description of lens regeneration in the newt, Notophthalmus viridescens
title_sort a scanning electron microscopic and quantitative histologic description of lens regeneration in the newt, <i>notophthalmus viridescens</i>
title_unstemmed A scanning electron microscopic and quantitative histologic description of lens regeneration in the newt, Notophthalmus viridescens
topic Developmental Biology, Animal Science and Zoology
url http://dx.doi.org/10.1002/jmor.1051580104