Desarrollo de los verticilos sexuales de Vanroyenella plumosa Novelo & Philbrick (Podostemaceae)
The vegetative body of Vanroyenella plumosa Novelo & Philbrick (subfamily Podostemoideae) is composed of roots, leaves and a dorsiventrally flattened thalloid stem which, in the reproductive stage of the life cycle, develops cavities containing fascicles of flowers. In this work the embryolo...
| Hoofdauteurs: | , , , |
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| Formaat: | Online |
| Taal: | spa |
| Gepubliceerd in: |
Instituto de Ecología, A.C.
2001
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| Online toegang: | https://abm.ojs.inecol.mx/index.php/abm/article/view/883 |
| _version_ | 1799771235099344896 |
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| author | Murguía Sánchez, Guillermina Novelo R., Alejandro Philbrick, C. Thomas Márquez Guzmán, G. Judith |
| author_facet | Murguía Sánchez, Guillermina Novelo R., Alejandro Philbrick, C. Thomas Márquez Guzmán, G. Judith |
| author_sort | Murguía Sánchez, Guillermina |
| collection | ABM |
| description | The vegetative body of Vanroyenella plumosa Novelo & Philbrick (subfamily Podostemoideae) is composed of roots, leaves and a dorsiventrally flattened thalloid stem which, in the reproductive stage of the life cycle, develops cavities containing fascicles of flowers. In this work the embryology of this species was studied. Floral development depends on the flower position in the vegetative body of the plant, the plant position on the rock and the water level in the river. Vanroyenella plumosa possesses two stamens with tetrasporangiate anthers; the anther wall formation is of the basic type. Tetrads are tetrahedral, and the pollen is bicellular. The gynoecium is bicarpelar and bilocular with axial placentation and has two stigmas with idioblasts whose vacuoles contain proteins and carbohydrates. The ovules are anatropous, bitegmic and tenuinucellate. The embryo sac is monosporic in its origin and tetracellular of the Apinagia type. In Vanroyenella floral development occurs in the interior of the stem while the plant is submerged, and it is during this very early stage that the male and female gametes are formed. When the water level recedes, the pedicels elongate and anthesis occurs above water. The ovary wall supports the seed development after the rest of the vegetative tissue has died. |
| format | Online |
| id | oai:oai.abm.ojs.inecol.mx:article-883 |
| institution | Acta Botanica Mexicana |
| language | spa |
| publishDate | 2001 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | oai:oai.abm.ojs.inecol.mx:article-8832022-12-24T05:12:20Z Desarrollo de los verticilos sexuales de Vanroyenella plumosa Novelo & Philbrick (Podostemaceae) Murguía Sánchez, Guillermina Novelo R., Alejandro Philbrick, C. Thomas Márquez Guzmán, G. Judith androecium gynoecium nucellar plasmodium embryo sac Vanroyenella Podostemaceae Mexico androceo gineceo plasmodio nucelar saco embrionario Vanroyenella Podostemaceae México The vegetative body of Vanroyenella plumosa Novelo & Philbrick (subfamily Podostemoideae) is composed of roots, leaves and a dorsiventrally flattened thalloid stem which, in the reproductive stage of the life cycle, develops cavities containing fascicles of flowers. In this work the embryology of this species was studied. Floral development depends on the flower position in the vegetative body of the plant, the plant position on the rock and the water level in the river. Vanroyenella plumosa possesses two stamens with tetrasporangiate anthers; the anther wall formation is of the basic type. Tetrads are tetrahedral, and the pollen is bicellular. The gynoecium is bicarpelar and bilocular with axial placentation and has two stigmas with idioblasts whose vacuoles contain proteins and carbohydrates. The ovules are anatropous, bitegmic and tenuinucellate. The embryo sac is monosporic in its origin and tetracellular of the Apinagia type. In Vanroyenella floral development occurs in the interior of the stem while the plant is submerged, and it is during this very early stage that the male and female gametes are formed. When the water level recedes, the pedicels elongate and anthesis occurs above water. The ovary wall supports the seed development after the rest of the vegetative tissue has died. El cuerpo vegetativo de Vanroyenella plumosa Novelo & Philbrick (subfamilia Podostemoideae) posee raíz, hojas y un tallo taloide dorsiventralmente aplanado que, durante la etapa reproductora, desarrolla cavidades ocupadas por fascículos florales. En este trabajo se estudió la embriología de esta especie y se relacionó el desarrollo floral con la posición de las flores en el cuerpo vegetativo de la planta, la posición de la planta sobre la roca y de la planta con el nivel del agua. Vanroyenella plumosa presenta dos estambres cuyas anteras son tetrasporangiadas, con un desarrollo de la pared de tipo Básico, tétradas tetraédricas y polen bicelular. El gineceo es bicarpelar y bilocular con placentación axial y presenta dos estigmas con idioblastos cuya vacuola contiene proteínas y carbohidratos. Los óvulos son anátropos, bitégmicos y tenuinucelados. El saco embrionario es monospórico y tetracelular, del tipo Apinagia. En Vanroyenella el desarrollo floral ocurre en el interior del tallo mientras la planta está sumergida, allí se forman los gametos en etapas muy tempranas. Cuando el nivel del agua baja, los pedicelos se alargan y sobreviene la antesis, en el ambiente aéreo. La pared del ovario sostiene el desarrollo de las semillas una vez que el resto del tejido vegetativo ha muerto. Instituto de Ecología, A.C. 2001-10-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion artículo evaluado por pares application/pdf https://abm.ojs.inecol.mx/index.php/abm/article/view/883 10.21829/abm57.2001.883 Acta Botanica Mexicana; No. 57 (2001); 37-50 Acta Botanica Mexicana; Núm. 57 (2001); 37-50 2448-7589 0187-7151 spa https://abm.ojs.inecol.mx/index.php/abm/article/view/883/1049 Derechos de autor 2016 Acta Botanica Mexicana https://creativecommons.org/licenses/by-nc/4.0 |
| spellingShingle | Murguía Sánchez, Guillermina Novelo R., Alejandro Philbrick, C. Thomas Márquez Guzmán, G. Judith Desarrollo de los verticilos sexuales de Vanroyenella plumosa Novelo & Philbrick (Podostemaceae) |
| title | Desarrollo de los verticilos sexuales de Vanroyenella plumosa Novelo & Philbrick (Podostemaceae) |
| title_full | Desarrollo de los verticilos sexuales de Vanroyenella plumosa Novelo & Philbrick (Podostemaceae) |
| title_fullStr | Desarrollo de los verticilos sexuales de Vanroyenella plumosa Novelo & Philbrick (Podostemaceae) |
| title_full_unstemmed | Desarrollo de los verticilos sexuales de Vanroyenella plumosa Novelo & Philbrick (Podostemaceae) |
| title_short | Desarrollo de los verticilos sexuales de Vanroyenella plumosa Novelo & Philbrick (Podostemaceae) |
| title_sort | desarrollo de los verticilos sexuales de vanroyenella plumosa novelo & philbrick (podostemaceae) |
| url | https://abm.ojs.inecol.mx/index.php/abm/article/view/883 |
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