Pollen Wall Substructure and Development inTanacetum vulgare(Compositae: Anthemideae): Revisiting Hypotheses on Pattern Formation in Complex Cell Walls
| Autor: | Stephen Blackmore, Nina I. Gabarayeva, Valentina V. Grigorjeva |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine food and beverages Pattern formation Plant Science Biology Complex cell medicine.disease_cause biology.organism_classification 01 natural sciences Family Compositae 03 medical and health sciences 030104 developmental biology medicine.anatomical_structure Pollen Anthemideae Botany medicine Ecology Evolution Behavior and Systematics Pollen wall 010606 plant biology & botany |
| Zdroj: | International Journal of Plant Sciences. 177:347-370 |
| ISSN: | 1537-5315 1058-5893 |
| Popis: | Premise of research. The pollen wall, arguably the most complex cell wall found in plants, is especially elaborate in the family Compositae. Through a detailed ontogenetic study of Tanacetum vulgare pollen, capturing each stage of development at a high level of resolution, we aim to understand the establishment of complex pollen walls and try to unravel the mechanisms and interactions underlying sporoderm development. Other aims are to compare our observations and interpretation with previous studies designed to elucidate the underlying mechanisms of sporoderm development and pattern determination in flowering plants and to clarify whether our earlier self-assembly hypothesis is applicable in Tanacetum.Methodology. TEM, SEM, chemical degradation, and comparative methods were used in this study.Pivotal results. The sequence of events leading to exine emergence from early tetrad stage to maturity is as follows: the appearance of spherical units, small invagination beneath spherical units, columns of spheric... |
| Databáze: | OpenAIRE |
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