Fungi, Ascomycetes, Ustilaginales, Uredinales . Fig. 76. Ascobolusfurfuraeeus Pers.; a. young archicarp, X750; b. rather olderspecimen showing pores between the cells, x 625 ; after Welsford. fi iurth from the apex (Welsford), enlarges, buds out ascogenous hyphae andfunctions as the oogonium. Those near the base form a stalk, and thosetowards the apex may be regarded as constituting a now functionlesstrichogyne. The cells on each side of the oogonium communicate with it by meansof pores (fig. j6 b). Additional nuclei pass into it from both the stalk andterminal cells, and Welsford has observed
Fungi, Ascomycetes, Ustilaginales, Uredinales . Fig. 76. Ascobolusfurfuraeeus Pers.; a. young archicarp, X750; b. rather olderspecimen showing pores between the cells, x 625 ; after Welsford. fi iurth from the apex (Welsford), enlarges, buds out ascogenous hyphae andfunctions as the oogonium. Those near the base form a stalk, and thosetowards the apex may be regarded as constituting a now functionlesstrichogyne. The cells on each side of the oogonium communicate with it by meansof pores (fig. j6 b). Additional nuclei pass into it from both the stalk andterminal cells, and Welsford has observed their fusion in pairs in theoogonium. The fusion nuclei pass into the ascogenous hyphae. The asciare large and produce each eight spores which are violet or brownish incolour; the epispore is characteristically sculptured at maturity. There areeight chromosomes in the first division in the ascus, and four in the secondand third (Dangeard (fig. 13), Fraser and Brooks). In Ascobolus glaber the archicarp is larger and more twisted than inA. furf
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectfungi, bookyear1922
