Microsporogenesis and microgametogenesis in Jacaranda mimosifolia (Bignoniaceae)
The development of the anther wall in Jacaranda mimosifolia is Dicotyledonous type. The tapetum is secretory and dimorphic. The microspore tetrads are tetrahedral and the pollen grains are two-celled at the shedding stage. Concurrent with the dissolution of the tapetal cell walls, a new membrane is...
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| Autores principales: | , |
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| Formato: | JOUR |
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00319449_v49_n2_p147_Galati |
| Aporte de: |
| Sumario: | The development of the anther wall in Jacaranda mimosifolia is Dicotyledonous type. The tapetum is secretory and dimorphic. The microspore tetrads are tetrahedral and the pollen grains are two-celled at the shedding stage. Concurrent with the dissolution of the tapetal cell walls, a new membrane is formed covering the protoplasts of these cells. Übisch bodies are prominent on the inner surface of this tapetal membrane. A new type of endothecium is described for Bignoniaceae, the endothecial cells acquire thickenings as fibrous bands only along the inner tangential wall. |
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