. Comparative morphology of Fungi. Fungi. EUASCOMYCETES 111 In many species, the conidia are bound together in chains by short disjunctors (connectives). Brefeld (1874) regards this in his Penicil- lium "crustaceum" as a section of the "; Thorn (1914; Thorn and Church, 1926) considers that in Aspergillus the true, thick, round spore wall has only arisen in the cells cut off from the phialides; in case these original cells are not entirely filled out, the collapsed residue remains hanging as a connective between the spores. According to some observa- tions of the au
. Comparative morphology of Fungi. Fungi. EUASCOMYCETES 111 In many species, the conidia are bound together in chains by short disjunctors (connectives). Brefeld (1874) regards this in his Penicil- lium "crustaceum" as a section of the "; Thorn (1914; Thorn and Church, 1926) considers that in Aspergillus the true, thick, round spore wall has only arisen in the cells cut off from the phialides; in case these original cells are not entirely filled out, the collapsed residue remains hanging as a connective between the spores. According to some observa- tions of the author on Penicilliopsis clavariaefonnis it is a question of papil- liform arching at the base of the conidia whose function is still Fig. 111.—Penicilliopsis clavariaeformis. 1 to 3. Development of the eonidiophore. Sp, germinated conidium. Penicilliopsis brasilie?isis. 4. Conidiophore with dimorphic conidia. (X 330; 1 to 3 original; 4 after Moller, 1901.) Under certain cultural conditions, as on substrates which contain nitrogen in the form of nitrates, also by increased transpiration, by lowering the oxygen tension of the air, in the presence of glycerol as a carbon source, or in definite physical state of the substrate, the conidio- phores of many species of Penicillium form coremia (Munk, 1912; Wehmer, 1914; Boas, 1915, 1916). While these conidia (Fig. 110) in true species of Penicillium form only as abnormalities, in some other genera (by some authors regarded as subgenera of Penicillium), as in Acaulium (Fig. 7, 2) and Stysanus (Fig. 7, 1), they have become the rule and thus arise normally. In these genera there are beginnings of conidial fructifications which we shall meet later in Isaria (imperfect forms of Cordyceps) under the Hypocreaceae; thus a series of species. 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 res
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