. Elements of botany. Plants. 232 ELEMENTS OF BOTANY. borne. Are these stalks and the mycelium filaments solid or tubular ? Are they one-celled or several-celled ? Mount some of the mature spore-cases in water, examine them with the highest obtainable power, and sketch the escaping spores. Sow some of these spores i on the surface of "hay-tea," made by boiling a handful of hay in just water enough to cover it and then straining through cloth or filtering through a paper filter. After from three to six hours, examine a drop from the surface of the liquid with a medium power of the mic
. Elements of botany. Plants. 232 ELEMENTS OF BOTANY. borne. Are these stalks and the mycelium filaments solid or tubular ? Are they one-celled or several-celled ? Mount some of the mature spore-cases in water, examine them with the highest obtainable power, and sketch the escaping spores. Sow some of these spores i on the surface of "hay-tea," made by boiling a handful of hay in just water enough to cover it and then straining through cloth or filtering through a paper filter. After from three to six hours, examine a drop from the surface of the liquid with a medium power of the microscope (half- inch objective) to see how the development of hyphse from the spores begins. Sketch. After about 24 hours examine another portion of the mould from the surface of the liquid and study the more fully de- veloped mycelium. Sketch. 287. Zygospores.—Besides the spores just studied, zygo- spores are formed by conjuga- tion of the hyphse of the black moulds. It is not very easy to find these in process of forma- tion, but the student may be able to gather from Fig. 200 the nature of the process by which they are formed: a process which cannot fail to remind him of the conjugation of 5 Fig. 200. —Formation of Zygospores in a Mould (Mucor Mucedo). 1, threads in contact previous to conjugation ; 2, cutting off of ttie conjugating cells, a, from the threads, 6 ; 3, a later stage of the process ; 4, ripe zygospore ; 5, germination of a zygospore and formation of a spore- case. (1-4 magnified 225 diameters, 5 magni- fied about 60 ;» FUNGI. 288. Characteristics of FunrjL — The yeasts and the moulds are humble representatives of an immense multitude of para-- 1 The spores of Penicillium will do as 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 Bergen, Joseph Y. (Jose
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectplants, bookyear1896
