. Elementary principles of agriculture : a text book for the common schools. Agriculture. 150 Elementary Principles of Agriculture. 217. How Fungi Propagate. Fungi prop- agate by minute cells, called spores. They cor- respond to seeds of higher plants. They require the same con- ditions for germina- Fig. 89. Germinating spores of the "Potato tion aS Seeds. Fig. 89 Blight" fungus. Cross section through a , c portion of a stalk. Two germinating ShOWS a SpOrC OI tue spores (a, b) piercing the epidermis, and x j. i t i j. • i. the threads penetrating the cells of the potatO blight gO
. Elementary principles of agriculture : a text book for the common schools. Agriculture. 150 Elementary Principles of Agriculture. 217. How Fungi Propagate. Fungi prop- agate by minute cells, called spores. They cor- respond to seeds of higher plants. They require the same con- ditions for germina- Fig. 89. Germinating spores of the "Potato tion aS Seeds. Fig. 89 Blight" fungus. Cross section through a , c portion of a stalk. Two germinating ShOWS a SpOrC OI tue spores (a, b) piercing the epidermis, and x j. i t i j. • i. the threads penetrating the cells of the potatO blight gOrmmat- leaf. Highly magnifiedT .^^^ ^^ ^ j^^^^_ ^^^^ ^^^^ thread soon enters the plant and absorbs the moisture and food substance of the potato leaf. It soon forms a crop of spores, sometimes in only a few days. These spores are blown to other plants, and soon a whole field will be blighted by the fungus. Most species of fungi grow on only one kind of plant. The fungus that causes grape mildew (Fig. 90) does not grow on any other kind of plants but grapes. The fungus that causes the blasting of the ears and tassels of corn (corn smut) grows only on corn. The fungus that causes the smut of oats never at- tacks corn. However, the Fig. 90. Downy mildew of grape r XI J. 1 ji (Plasmopora viticold), showing fungus that produces the tuft of gonidiophores bearing , • 1 XX 1 gonidia, also intercellular myce- rust on grams also attacks uum. 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 Ferguson, A. M. (Alexander McGowen), 1874-; Lewis, Lowery Laymon, 1869-. Chicago, Ill. : Ferguson Publishing Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
