. The potato . Potatoes. 186 The Potato molds. A fungus is itself a plant, but without leaves or green It is not able to prepare its own food as higher plants do, but must live upon the product of other plants. Many fungi and bacteria and most slime-molds are saprophytes, that is, they obtain food from the prod- ucts of plants or animals that are dead. Others are parasites — obtaining their food from the products of living plants by attacking the living tissues, injuring or killing them and thus causing a diseased condition in the plant or the death of the entire plant. A fungus differ
. The potato . Potatoes. 186 The Potato molds. A fungus is itself a plant, but without leaves or green It is not able to prepare its own food as higher plants do, but must live upon the product of other plants. Many fungi and bacteria and most slime-molds are saprophytes, that is, they obtain food from the prod- ucts of plants or animals that are dead. Others are parasites — obtaining their food from the products of living plants by attacking the living tissues, injuring or killing them and thus causing a diseased condition in the plant or the death of the entire plant. A fungus differs from a higher plant in that it does not have roots, stems or leaves in the sense in which we generally regard these organs, but in its vegetative stage it consists of tiny thread- like tubes or strands known collectively as mycelia. The mycelium penetrates the food ma- terial and obtains its nu- trition from it. After a period of growth the mycelium produces its fruiting body which va- ries greatly in size, shape and condition in the dif- ferent fungi. The fruit- ing body bears the re- productive bodies known as spores (Fig. 15), of which enormous numbers are usually produced. These are disseminated by water, air or animals, depending on the kind of fungus producing them. When spores of parasitic fungi fall upon their host plant, that is, the plant from which they are able. Pio. 16. (After U. S. Dept. Agr.) Below from right to left are shown four stages in the formation of swarm spores. The way in which the swarm spores germinate is shown 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 Gilbert, Arthur Witter, 1882-1936; Barrus, Mortier Franklin, 1879-1962; Dean, Daniel. New York : Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1917
