. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. FUNGI 387. noted in (Edogonium. It does not directly produce a plant like its parent. It produces a number of thin-walled sacs or asci, and in each ascus a num- ber of spores are found. (See Figure 186.) Thus, as a result of the sex process, a considerable number of individuals are produced. It is by means of the ascocarps that this fungus lives over winter. d. Wheat Rust.—That parasitic fungus which causes wheat rust produces four distinct kinds of spores
. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. FUNGI 387. noted in (Edogonium. It does not directly produce a plant like its parent. It produces a number of thin-walled sacs or asci, and in each ascus a num- ber of spores are found. (See Figure 186.) Thus, as a result of the sex process, a considerable number of individuals are produced. It is by means of the ascocarps that this fungus lives over winter. d. Wheat Rust.—That parasitic fungus which causes wheat rust produces four distinct kinds of spores. In this it is not entirely different from other fungi of the same group, but it is the one whose peculiar life history was first understood. Its name is Puccinia. Like the rust of oats, wheat rust is first noticed as rust-colored marks on the stems and leaves of its host. The rust-colored areas spread. If you walk through a field of rusted oats or wheat, your clothes become covered with a reddish-brown dust. Under a microscope this dust is found to be nothing but spores. The rusty patches on the plant are nothing but spores. The mycelium, which burrows among the tissues of the leaf and stem, has sent hundreds of sporophores to the surface, and these have borne thousands of these rust-colored spores. This kind of spore is called the summer spore. By means of its sum- mer spores this parasite spreads rapidly in a field where it has gained a start. (See Figure 187.) Fig. 184. — Sex reproduction in the bread mold. Note that the ends of two hyphae which come together are cut off from the rest of the mycelium by cross walls. The parts thus cut off fuse, and a dark colored oospore results.—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, Amer
Size: 1259px × 1985px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
