. The cytoplasm of the plant cell. Plant cells and tissues; Protoplasm. Chapter IX 91 — Chondriosomes & Plastids >r^ elements which are different, but whose form is similar: the plas- tids, peculiar to chlorophyll-bearing plant cells; and other elements, which, hesitating for some unknown reason to liken to the chon- driosomes of animal cells, he groups into a category which he calls the pseudo-chondriome, Weier (1930-1933), having obtained impregnation of the chlo- roplasts of Polytrichum commune by Golgi technique, felt justified in likening the plastids of plant cells to the Golgi ap
. The cytoplasm of the plant cell. Plant cells and tissues; Protoplasm. Chapter IX 91 — Chondriosomes & Plastids >r^ elements which are different, but whose form is similar: the plas- tids, peculiar to chlorophyll-bearing plant cells; and other elements, which, hesitating for some unknown reason to liken to the chon- driosomes of animal cells, he groups into a category which he calls the pseudo-chondriome, Weier (1930-1933), having obtained impregnation of the chlo- roplasts of Polytrichum commune by Golgi technique, felt justified in likening the plastids of plant cells to the Golgi apparatus de- scribed in animal cells. This theory was adopted by DuBOSCQ and Grasse who, in a recent treatise, maintain that in animal cells there are two sorts of permanent, closely allied constituents of a lipoprotein nature, namely, the chondriosomes and the Golgi mate- rial, or dictyosomes, the latter being comparable to the plastids of chlorophyll-bearing plants. Finally, Kiyohara (1936), after mak- ing observations of living material car- ried out under improper conditions, thought he noticed that all the plastids normally appear as vesicles and that it is the mitochondrial technique which al- ters them and makes them appear as chondrioconts. But this Japanese inves- tigator obtained plastids of vesicular form by osmic impregnation, the tech- nique used fot- the detection of the Golgi apparatus. He thinks that chondrio- somes do not exist in plant cells and that all forms described under that name cor- respond to images brought about by alterations in the plastids. He reports, however, that in mature cells there al- ways exist, as well as the large vesicular plastids, other much smaller vesicles, but these he believes to be plastids in the act of degenerating. All these theories, aside from being essentially contradictory are, unfortunately, at variance with the facts. They are the result of hasty generalizations, founded on observations limited to certain types of cells
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