. Essentials of botany. Botany; Botany. 248 ESSENTIALS OF BOTANY After from three to six hours examine a drop from the surface of the liquid with After about twenty-four hours examine another portion of the mold from the surface of the liquid. Note : (c) The beginning of for- mation of hyphse and their con- tinued development. Draw. In a prepared slide study the conjugation of mold hy- phse and the formation of zygospores (Fig. 173). 321. Discussion.âThe bread-mold is a typical saprophytic fungus. In its structure, consisting of a much-branched and extremely large continu- ous protoplast
. Essentials of botany. Botany; Botany. 248 ESSENTIALS OF BOTANY After from three to six hours examine a drop from the surface of the liquid with After about twenty-four hours examine another portion of the mold from the surface of the liquid. Note : (c) The beginning of for- mation of hyphse and their con- tinued development. Draw. In a prepared slide study the conjugation of mold hy- phse and the formation of zygospores (Fig. 173). 321. Discussion.âThe bread-mold is a typical saprophytic fungus. In its structure, consisting of a much-branched and extremely large continu- ous protoplast with many nuclei, it considerably resembles Vaucheria. Its reproduction is of two kinds,-âasexual, by the formation of spores within a spore-case, and sexual, 1, threads in contact previous to conjuga- by the conjugation of tion;-2, cutting off of the conjugating â â ^ â ,^ ^ cells a from the tiireads 6; 3, a later similar-appearmg threads stageof the process; 4, ripe zygospore; (gametes) forming zygO- 5, germination of a zygospore and rpi j-p- -|7Q\ formation of a spore-case. (1-imagni- SporeS. 1 Dese (1< Ig. i i O) fled 225 diameters; 5, magnified about are not aS frequently pro- 60 diameters.) , , , ,, , , , , duced by the bread-moid as by some other closely related genera. The formation of the asexual spores in spore-cases is similar to the mode already mentioned in yeast fungi. Fig. 173. Formation of Zygospores in a Mold {Mucor Mucedo).. 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. (Joseph Young), 1851-1917. Boston, Ginn
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