Patterning of stomata in the mossFunaria: a simple way to space guard cells
| Autor: | Amelia Merced, Karen S. Renzaglia |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine biology fungi Plant Stomata Original Articles Plant Science Immunogold labelling Cell fate determination biology.organism_classification 01 natural sciences Bryopsida Cell biology 03 medical and health sciences 030104 developmental biology Microscopy Electron Transmission Funaria Guard cell Arabidopsis Botany Microscopy Electron Scanning Ultrastructure 010606 plant biology & botany |
| Zdroj: | Annals of Botany. 117:985-994 |
| ISSN: | 1095-8290 0305-7364 |
| Popis: | Background and Aims Studies on stomatal development and the molecular mechanisms controlling patterning have provided new insights into cell signalling, cell fate determination and the evolution of these processes in plants. To fill a major gap in knowledge of stomatal patterning, this study describes the pattern of cell divisions that give rise to stomata and the underlying anatomical changes that occur during sporophyte development in the moss Funaria. Methods Developing sporophytes at different stages were examined using light, fluorescence and electron microscopy; immunogold labelling was used to investigate the presence of pectin in the newly formed cavities. Key Results Substomatal cavities are liquid-filled when formed and drying of spaces is synchronous with pore opening and capsule expansion. Stomata in mosses do not develop from a self-generating meristemoid as in Arabidopsis, but instead they originate from a protodermal cell that differentiates directly into a guard mother cell. Epidermal cells develop from protodermal or other epidermal cells, i.e. there are no stomatal lineage ground cells. Conclusions Development of stomata in moss occurs by differentiation of guard mother cells arranged in files and spaced away from each other, and epidermal cells that continue to divide after stomata are formed. This research provides evidence for a less elaborated but effective mechanism for stomata spacing in plants, and we hypothesize that this operates by using some of the same core molecular signalling mechanism as angiosperms. |
| Databáze: | OpenAIRE |
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