. The cytoplasm of the plant cell. Plant cells and tissues; Protoplasm. OOG \ 4i v7 * i f Fig. 40 (left). — Successive stages in the formation of leucoplasta in the root of Phajtts grandifalius. Regaud's method. Fig. 41 (right). — Leucoplasta from the root of Phajus grandifalius showing starch. 1, central cylinder; 2, cortical parenchyma. Regaud's method. stages of development it is seen that the starch grains are absorbed within the chondrioconts which persist after the disappearance of the starch (Fig. 44). It can also be seen in these same cells that the chondrioconts are, at certain stages
. The cytoplasm of the plant cell. Plant cells and tissues; Protoplasm. OOG \ 4i v7 * i f Fig. 40 (left). — Successive stages in the formation of leucoplasta in the root of Phajtts grandifalius. Regaud's method. Fig. 41 (right). — Leucoplasta from the root of Phajus grandifalius showing starch. 1, central cylinder; 2, cortical parenchyma. Regaud's method. stages of development it is seen that the starch grains are absorbed within the chondrioconts which persist after the disappearance of the starch (Fig. 44). It can also be seen in these same cells that the chondrioconts are, at certain stages, the seat of a production of small osmium-reducing lipide globules, clearly visible on the long axis of these elements because of their strongly refractive power. These granules which often completely fill the chondriocont are very frequent in the monocotyledons. They can not be considered as formed of a-^ hexylene-aldehyde (Meyer), for they present char- acteristics of lipides and not those of aldehydes. The fact that they are stained by Dietrich's method suggests that they are ma(ae up of phosphoaminolipides. These granules, very numerous in the young stages of development of leaves, bracts and floral parts, disappear from the plastids as soon as the starch grains and pig-. 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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Keywords: ., bookcentury1900, bookcollection, booksubjectplantcellsandtissues
