. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. 704 ADDITIONAL EXERCISES Pcnicillium cxpansum (Fig. 243) which can always be obtained from apples decayin-; in storage. Colonies of this mould upon gelatin and potato, or bean agar, arc green, becoming gray-green and later brown. The conidiophores are tufted into corem- ium-like clusters. The conidia fructifications consist of one to three main branches bearing verticils of branchlets supporting crowded whorls of sterigmata. Conidiospores are elliptic 2 by , green, persisting in cha
. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. 704 ADDITIONAL EXERCISES Pcnicillium cxpansum (Fig. 243) which can always be obtained from apples decayin-; in storage. Colonies of this mould upon gelatin and potato, or bean agar, arc green, becoming gray-green and later brown. The conidiophores are tufted into corem- ium-like clusters. The conidia fructifications consist of one to three main branches bearing verticils of branchlets supporting crowded whorls of sterigmata. Conidiospores are elliptic 2 by , green, persisting in chains, when Fig. 243.—Penicillium expansum. a, b, f. Arrangement of braijches ot conidial fructification; c, d. e. conidiiferous cells and chains of conidiospores; g, h, j, k. I. sketches of fructification; m, n, o, germination ot conidiospores; r. s. sketches show- ing in .r loose aggregations of conidiophores, r coremium. (After Thorn.) Penicillium Roquejorti (Fig. 244) is the agent in the ripening of Roquefort, Gorgonzola and Stilton cheeses. Colonies on potato agar quickly become green, becoming a dirty brown when old. The velvety mycelium consists of radiating branching hyphse giving an indefinite margin. The conidiophores arise separately and in acropetal succession from the growing parts of submerged hyphie, 200 to 300^1. 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 Harshberger, John W. (John William), 1869-1929. Philadelphia : P. Blakiston's Son & Co
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfungi, bookyear1917
