Abstract
Cells of the resting vascular cambium ofFagus sylvatica contain vesiculate smooth endoplasmic reticulum, free ribosomes, oil droplets, protein bodies and few or no vacuoles. Active cambial cells and young differentiating xylem elements are highly vacuolate and contain rough cisternal ER and polyribosomes. The Golgi apparatus is active in the production of vesicles and particles of about 25 nm diameter are found just outside the plasmalemma of differentiating xylem cells. The possibility that vacuoles are formed by the progressive dissolution of stored proteins during the onset of cambial activity, and that protein bodies are formed by deposition of storage products in vacuoles, is confirmed.
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Farooqui, P., Robards, A.W. Seasonal changes in the ultrastructure of cambium ofFagus sylvatica L.. Proc. Indian Acad. Sci. 88, 463–472 (1979). https://doi.org/10.1007/BF03046136
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DOI: https://doi.org/10.1007/BF03046136