. Principles of plant culture; an elementary treatise designed as a text-book for beginners in agriculture and horticulture. Horticulture; Botany. 42 Principles of Plant Culture. â o'hen a plant containing green leaves is kept for a time in the dark, us when celery is banked up with earth, the chlorophyll disappeais and the green parts become white. The chlorophyll saturates definite particles of protoplasm, called chlorophyll bodies, and since the cell- walls and protoplasm are transparent in the younger cells, the chlorophyll bodies give the parts containing ^? cfi. Fie. 15. Showing cross-se
. Principles of plant culture; an elementary treatise designed as a text-book for beginners in agriculture and horticulture. Horticulture; Botany. 42 Principles of Plant Culture. â o'hen a plant containing green leaves is kept for a time in the dark, us when celery is banked up with earth, the chlorophyll disappeais and the green parts become white. The chlorophyll saturates definite particles of protoplasm, called chlorophyll bodies, and since the cell- walls and protoplasm are transparent in the younger cells, the chlorophyll bodies give the parts containing ^? cfi. Fie. 15. Showing cross-section tlirough leaf of Fagus sylvatica. C chlorophyll bodies; Ep epidermis of upper surface of leaf; Ep" epider- mis of lower surface; K cells containing ci-ystals; PI palisade layer; F vascular bundle; St stoma; I spaces between the cells (intercellular spaces). Highly magnified. (After Strasburger). them a green color. Fig. 15 shows the distribution of the chlorophyll bodies in the cells of a portion of a leaf of the beech. They ai')pear as minute globules, which in this case are mostly located near the cell-walls. They are most numerous near the upper surface of the leafâ the part most exposed to the sun's rays. 59. No Food can be formed Without Chlorophyll. By the agency of chlorophyll, the chlorophyll bodies absorb energy in the form of light. This energy the chloro- phyll body uses to take to pieces the carbonic acid, min- eral salts and water absorbed from the air and the soil,. 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 Goff, E. S. (Emmett Stull), 1852-1902. Madison, Wis. , The Author
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