College Botany; Structure, Physiology And Economics of Plants
The book College Botany; Structure, Physiology And Economics of Plants was written by author Cook, Melville Thurston, 1869-1952 Here you can read free online of College Botany; Structure, Physiology And Economics of Plants book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is College Botany; Structure, Physiology And Economics of Plants a good or bad book?
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It is very similar to the grape mil- dew and is one of the most important plant diseases. The Zygomycetes are isogamous, aerial, and reproduce by non-motile asexual spores and usually by conjugation. They are well illustrated by the common bread mold, Khizopus nigrimns, although they inchide several other genera. RMzopus nigricans is the bread mold fungus (Fig. 127). 278 COLLEGE BOTANY It appears as a prominent, white growth on the surface of moist bread, fruits and vegetables. It causes the ro...tting of stored fruits and vegetables. The mycelium is a branching, coenoeytic filament which penetrates, the food material and produces up- right, aerial gi-o-wths bearing sporangia. These sporangia bear great numbers of spores which escape, become dry and sometimes Fig. 127. — Khizopus nigricans or bread mould; (a) entire plant showing sporangia; (b) mature zygospore. live for many years. They also reproduce sexually by the forma- tion of processes which unite to form zygospores. The Ascomycetes contains the largest number of species of any of the divisions of fungi and a great many of them are para- sitic.
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