A light and electron-microscopic study of microsporogenesis in azolla-microphylla
SynopsisMicrosporogenesis in cultured material of Azolla microphylla was studied with the light and transmission electron microscopes. The first formed sporangium, a megasporangium, aborts and several microsporangia develop below. Initially, a single sporogenous cell is present, surrounded by a sing...
| Autores principales: | , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Cambridge University Press
1985
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| Acceso en línea: | https://hdl.handle.net/10568/165834 |
| _version_ | 1855520874703093760 |
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| author | Herd, Y.R. Cutter, E.G. Watanabe, I. |
| author_browse | Cutter, E.G. Herd, Y.R. Watanabe, I. |
| author_facet | Herd, Y.R. Cutter, E.G. Watanabe, I. |
| author_sort | Herd, Y.R. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | SynopsisMicrosporogenesis in cultured material of Azolla microphylla was studied with the light and transmission electron microscopes. The first formed sporangium, a megasporangium, aborts and several microsporangia develop below. Initially, a single sporogenous cell is present, surrounded by a single layered tapetum and the microsporangial wall. Subsequently, several sporogenous cells are connected by plasmodesmata. The microspore mother cells are less densely cytoplasmic than the tapetal cells. Callose-like material is deposited around the microspore mother cells, but disappears before meiosis. The tetrads of microspores contain well defined organelles but less dense cytoplasm than the surrounding periplasmodium. Electron dense material deposited on the plasma membrane of the microspores eventually forms the endospore. The unornamented exospore develops by continued deposition of electron dense material. Degeneration of the periplasmodium gives rise to membranous material which appears to form a template for the massulae. |
| format | Journal Article |
| id | CGSpace165834 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1985 |
| publishDateRange | 1985 |
| publishDateSort | 1985 |
| publisher | Cambridge University Press |
| publisherStr | Cambridge University Press |
| record_format | dspace |
| spelling | CGSpace1658342025-05-14T10:39:36Z A light and electron-microscopic study of microsporogenesis in azolla-microphylla Herd, Y.R. Cutter, E.G. Watanabe, I. SynopsisMicrosporogenesis in cultured material of Azolla microphylla was studied with the light and transmission electron microscopes. The first formed sporangium, a megasporangium, aborts and several microsporangia develop below. Initially, a single sporogenous cell is present, surrounded by a single layered tapetum and the microsporangial wall. Subsequently, several sporogenous cells are connected by plasmodesmata. The microspore mother cells are less densely cytoplasmic than the tapetal cells. Callose-like material is deposited around the microspore mother cells, but disappears before meiosis. The tetrads of microspores contain well defined organelles but less dense cytoplasm than the surrounding periplasmodium. Electron dense material deposited on the plasma membrane of the microspores eventually forms the endospore. The unornamented exospore develops by continued deposition of electron dense material. Degeneration of the periplasmodium gives rise to membranous material which appears to form a template for the massulae. 1985 2024-12-19T12:55:31Z 2024-12-19T12:55:31Z Journal Article https://hdl.handle.net/10568/165834 en Cambridge University Press Herd, Y. R.; Cutter, E. G. and Watanabe, I. 1985. A light and electron-microscopic study of microsporogenesis in azolla-microphylla. Proc., Sect. B Biol. sci., Volume 86 p. 53-58 |
| spellingShingle | Herd, Y.R. Cutter, E.G. Watanabe, I. A light and electron-microscopic study of microsporogenesis in azolla-microphylla |
| title | A light and electron-microscopic study of microsporogenesis in azolla-microphylla |
| title_full | A light and electron-microscopic study of microsporogenesis in azolla-microphylla |
| title_fullStr | A light and electron-microscopic study of microsporogenesis in azolla-microphylla |
| title_full_unstemmed | A light and electron-microscopic study of microsporogenesis in azolla-microphylla |
| title_short | A light and electron-microscopic study of microsporogenesis in azolla-microphylla |
| title_sort | light and electron microscopic study of microsporogenesis in azolla microphylla |
| url | https://hdl.handle.net/10568/165834 |
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