Frey-Wyssling particles

An orange or yellow layer containing Frey-Wyssling particles which form 1 to 3% of latex volume. These particles are surrounded by a typical double membrane and accumulate lipid globules, isoprenic compounds, carotenoids, plastochromanols and plastoquinones. " ... 

In the light of more recent evidence, the original scheme of Frey-Wyssling et al. (1%3) has been revised as illustrated in Figure 10b (Schwarzenbach, 1971 Frey-Wyssling, 1973 Wanner and Theimer, 1S>78). Newly formed oil accumulates between the two layers of the endoplasmic reticulum double membrane. When the oil-filled vesicle reaches a certain critical size, it separates from the reticulum, becoming an independent particle with a singlelayer membrane (see Section IV, A, 3). 

The theory of Frey-Wyssling postulates the existence of monomolecular polypeptide filaments which must be about 20 A thick. However the electron microscope has revealed the presence in the C3rtoplasm of an endoplasmic reticulum made up of trabeculae 30 to 40 m/i in length, hollow tubes joining together vesicles 100 to 300 m/u in diameter. Attached to this system there are basophilic particles. In addition the cytoplasm contains fibres either singly or in bundles, which make up the contractile material of the cell and by means of a slow but continuous motion maintain the various organelles suspended in the cellular fluid. 

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