. The principles of plant culture; a text for beginners in agriculture and horticulture. Gardening; Botany. THE GROWING PLANT 35 chlorophyll bodies absorb energy in the form of light. This energy the chlorophyll body uses to take to pieces the carbonic acid, mineral salts and water absorbed from the air and the soil, and to recombine them into foods which can be used by the protoplasm in making new parts and repairing waste (photosynthesis). Until this food manufacture commences, no new plant substance has been formed. It is true that new cell-walls and new protoplasm. I I â "" ep Fi
. The principles of plant culture; a text for beginners in agriculture and horticulture. Gardening; Botany. THE GROWING PLANT 35 chlorophyll bodies absorb energy in the form of light. This energy the chlorophyll body uses to take to pieces the carbonic acid, mineral salts and water absorbed from the air and the soil, and to recombine them into foods which can be used by the protoplasm in making new parts and repairing waste (photosynthesis). Until this food manufacture commences, no new plant substance has been formed. It is true that new cell-walls and new protoplasm. I I â "" ep Fig. 15. â Cross-section through leaf of beech (Fagus). Ch chlorophyll bodies; Ep epidermis of upper surface of leaf; jBp"epidermis of lower surface; K cells containing crystals; PI palisade layer; P vascular bundle; St breathing pore (stoma) ; I spaces between the cells (intercellular spaces). Highly magnified. may be formed from the food supply of the seed before chlorophyll appears, but until chlorophyll is formed, and photosynthesis begins, the whole plantlet with whatever remains of the seed, when dried, weighs no more than the seed weighed at the beginning. The food material formed in photosynthesis is starch, or some substance of similar composition (sugar or oil), which, after under- going chemical changes if need be, to render it soluble, is distributed throughout the plant to be built up into tissues (assimilation) or to be held as reserve food (14).. 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; Moore, J. G. (James Garfield); Jones, L. R. (Lewis Ralph), 1864-1945. New York, Macmillan
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