. The cytoplasm of the plant cell. Plant cells and tissues; Protoplasm. Chapter VIII 73 _ The Chondriome (cont'd) duction of chlorophyll. In these cells, the chondriome always keeps the characteristics which it shows in the meristem. It, therefore, remains undifferentiated, made up of a mixture of mitochondria and thin chondrioconts. These phenomena may be verified in fresh material by studymg. Fig. 36. — Development of the two categories of chondriosomes in the bud of Elodea canadensis. 1, diagram of longitudinal section of bud; 2, mitochondria and chondrioconts in a foliar primordium at leve
. The cytoplasm of the plant cell. Plant cells and tissues; Protoplasm. Chapter VIII 73 _ The Chondriome (cont'd) duction of chlorophyll. In these cells, the chondriome always keeps the characteristics which it shows in the meristem. It, therefore, remains undifferentiated, made up of a mixture of mitochondria and thin chondrioconts. These phenomena may be verified in fresh material by studymg. Fig. 36. — Development of the two categories of chondriosomes in the bud of Elodea canadensis. 1, diagram of longitudinal section of bud; 2, mitochondria and chondrioconts in a foliar primordium at level (A); 3, 4, chondrioconts transforming into chloroplasts in a slightly older foliar primordium; 5, mature chloroplasts in cells of a nearly mature leaf taken at (B). Some of the mitochondria have be- come rods or chondrioconts; 6-11, details showing the same sequence of events. C, level at which chloroplasts develop in the stem, also chon- driosomes in Fig. 11. Regaud's method. the living bud. The tip of the bud may be seen, without any al- teration taking place within its cells, by stripping it of its oldest leaves and putting it in water under a cover slip which is pressed gently so as not to injure the vegetative point. It is seen that the meristem of the stem and of the youngest foliar primordia do not contain chlorophyll. In addition to a large nucleus, these cells show only a confusedly granular cytoplasm in which it is possible. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Guilliermond, Alexandre, 1876-; Atkinson, Lenette May Rogers, 1899-. Waltham, Mass. , Chronica Botanica Company
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