Primary Cell Wall Texture and Its Relation to Surface Expansion
| Autor: | Brigitte Vian, Jean-Claude Roland, Danièle Reis |
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| Rok vydání: | 1993 |
| Předmět: | |
| Zdroj: | International Journal of Plant Sciences. 154:1-9 |
| ISSN: | 1537-5315 1058-5893 |
| DOI: | 10.1086/297086 |
| Popis: | Recent data have revealed the frequent occurrence of helicoidal and cholesteric-like structures in various primary and secondary walls. The present article deals with the texture specificity and the texture changes in the primary wall during the rapidly growing phase. First we define the characteristics of the cholesteric pattern and the mesophases and discuss two possible sources of misinterpretations: one technical, the fragility of constructions, and one biological, the gradients, differentiation, and short-lived organization. Both features explain why the liquid crystal concept has emerged recently for the growing wall. Two examples of cells showing highly oriented surface growth are considered and compared. (a) Mung bean seedlings are often used for the study of expansion. In this model the external and growth-limiting tissues have primary walls with early and transient planar twisted assemblies. The latter are progressively sheared and dispersed, and growth stops when the helicoidal pattern is compl... |
| Databáze: | OpenAIRE |
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