Histologie de la mandragore (Mandragora autumnalis): une souche ambiguë
| Autor: | Yvette Czaninski, J. C. Roland |
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| Rok vydání: | 1993 |
| Předmět: | |
| Zdroj: | Acta Botanica Gallica. 140:23-34 |
| ISSN: | 2166-3408 1253-8078 |
| DOI: | 10.1080/12538078.1993.10515564 |
| Popis: | Summary The perennial and subterranean system of mandragora was studied by means of classical histology (specially using hydrochloric acid-phloroglucinol). The bulk of the hypertrophied and fleshy organ and its growth in girth results from the activity of a single and continuous vascular cambium. The fusiform initials are highly sinuous surrounding large nodules of short initials. The lignified derivatives that they only produce are rows of vessels mainly reticulated that are arranged in concentric rings. The vascular parenchyma is very abundant and rich in insoluble storage components (starch granules, proteins and lipidie droplets). When the organ presents an horizontal part, the growth of the secondary tissues is excentric and a “reaction wood” is formed toward the basal part; it is devoid of fibers. The caulinar part (with superposed primary xylem, central pith and internal phloem) Is present only in the very apical region and thus represents a relatively small portion of the body: it corresponds, pre... |
| Databáze: | OpenAIRE |
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