. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. THE NATURE OF SEEDS 347 cellulose of most plant tissues is not ordinarily used as food, but in some seeds the cell walls of the endosperm as well as of the testa become very thick. This thickening is com- posed of what is called reserve cellulose. (See Figure 155.) Upon germination this re- serve cellulose is used as food for the seed- ling. The seeds of persimmons and dates have much food stored in this way. Reserve cellulose gives excep- tional hardness
. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. THE NATURE OF SEEDS 347 cellulose of most plant tissues is not ordinarily used as food, but in some seeds the cell walls of the endosperm as well as of the testa become very thick. This thickening is com- posed of what is called reserve cellulose. (See Figure 155.) Upon germination this re- serve cellulose is used as food for the seed- ling. The seeds of persimmons and dates have much food stored in this way. Reserve cellulose gives excep- tional hardness to the endosperm; seeds which have much of it are said to be homy. In nearly all seeds. Fig. 154. — Cross section through the outer part of a grain of wheat, much magnified; k, the husk whose outer part is pericarp and whose inner part is testa; a, the gluten or aleurone layer whose cells are filled with grains of pro- tein ; b, a partof the starchy tissue which makes up the body of the grain. — After 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 Coulter, John G. (John Gaylord), b. 1876. New York, American Book Co
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
