. The essentials of botany. Botany. 144 BOTANY. 256. The mycelium sometimes develops exclusively in the interior of the nutrient medium; in other cases it de- velops partly in the medium and partly in the air. In some species the mycelium may occasionally attach itself to the hyphae of other plants of the same family, and even. Fig. 74.—Diagram showing the mode of growth of Mucor mucedo. m, the mycelium ; s, single spore-case, borne on an aerial erect hypha. to nearly related species, and derive nourishment parasiti- cally from them. It is doubtful, however, whether any species are entirely pa
. The essentials of botany. Botany. 144 BOTANY. 256. The mycelium sometimes develops exclusively in the interior of the nutrient medium; in other cases it de- velops partly in the medium and partly in the air. In some species the mycelium may occasionally attach itself to the hyphae of other plants of the same family, and even. Fig. 74.—Diagram showing the mode of growth of Mucor mucedo. m, the mycelium ; s, single spore-case, borne on an aerial erect hypha. to nearly related species, and derive nourishment parasiti- cally from them. It is doubtful, however, whether any species are entirely parasitic, and so far as parasitism occurs it appears to be confined to narrow limits; none, so far as known, are parasitic upon higher plants. 257. The reproduction of black moulds is asexual and sexual. In the asexual reproduction the mycelium sends up erect hyphse (Fig. 74), which produce fewer many sepa- rable reproductive cells—the spores. The method of for- mation of the spores in a common black mould (Mucor mucedo) is as follows: The vertical hyphse, which are filled with protoplasm, become enlarged at the top, and in each a transverse partition forms {A, a, Fig. 75), the por- tion above the partition (5) becomes larger, and, at the same time, the transverse partition arches up {B, a), finally ap-. 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 Bessey, Charles E. (Charles Edwin), 1845-1915. New York : Holt
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbotany, bookyear1896
