. Minnesota plant diseases. Plant diseases. Minnesota Plant Diseases. 155 the most destructive disease-causing alliances of the whole group of the fungi. As food producing fungi, the stalked fun- gus group is very important since all of the true mushrooms, the edible pore fungi, club and tooth fungi, as well as the great variety of puff balls are found in this group. The basidium-bearing fungi comprise the following twelve groups. Of these the last eleven possess true basidia, i. e., with a definite number of stalks and spores which are usually definitely arranged as at the summit or on the si
. Minnesota plant diseases. Plant diseases. Minnesota Plant Diseases. 155 the most destructive disease-causing alliances of the whole group of the fungi. As food producing fungi, the stalked fun- gus group is very important since all of the true mushrooms, the edible pore fungi, club and tooth fungi, as well as the great variety of puff balls are found in this group. The basidium-bearing fungi comprise the following twelve groups. Of these the last eleven possess true basidia, i. e., with a definite number of stalks and spores which are usually definitely arranged as at the summit or on the sides. In the smuts, however, the basidium, if so it may be called, bears a great number of spores which are budded off in yeast fashion from the side of the basidium cells. In other words the basid- ium of the smuts has not attained to the definiteness of the other basidium-bearing fungi and the smuts are often classed as a group outside of these. (For figures, see following groups.) Smuts {UstiiaginecB). Though not a very large group of fungi the smuts are very important from the economic stand- point because they contain many disease-producing forms. The smuts possess the simplest form of basidium found in the stalked fungi. They are all parasitic and many of them are half-parasitic in habit, since they are able to live in certain stages for an indefinite period in culture media. They can, how- o, ever, complete their life-story only as para- sites on certain plants. The basidium c/ arises directly from a resting-spore which is commonly known as the smut spore, producing the so-called smut of grain and of other plants. This smut or resting spore is usually black, dark-brown or dark- green in color and has a thick outer coat, which, under favorable conditions of moist- ure, breaks open and allows the inner wall to be shoved out in the form of a thread. This thread grows out to six or more times the length of the spore. It then becomes divided by cross-walls into three or four c
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectplantdi, bookyear1905
