Fungi, Ascomycetes, Ustilaginales, Uredinales . Fig. 147. Ustilago Scabiosae Sow.; development of basidium; after Harper. least two divisions; the basidium in turn produces a number of uninucleatesporidia or basidiospores. The basidium may be unicellular, giving rise toa bunch of basidiospores at its apex (Tilletia (fig. 148c?)), or multicellular,usually four-celled, producing one ormore basidiospores from each cell {Us-tilago (fig. 147 e)). The nucleus of theparent cell does not travel into thebasidiospore but divides, sending onedaughter nucleus into the spore, whilethe other, remaining in t
Fungi, Ascomycetes, Ustilaginales, Uredinales . Fig. 147. Ustilago Scabiosae Sow.; development of basidium; after Harper. least two divisions; the basidium in turn produces a number of uninucleatesporidia or basidiospores. The basidium may be unicellular, giving rise toa bunch of basidiospores at its apex (Tilletia (fig. 148c?)), or multicellular,usually four-celled, producing one ormore basidiospores from each cell {Us-tilago (fig. 147 e)). The nucleus of theparent cell does not travel into thebasidiospore but divides, sending onedaughter nucleus into the spore, whilethe other, remaining in the basidial cell,may undergo further divisions so thatnuclei are provided for a number ofspores. Inder suitable conditions the basi-diospores are cut off in considerablenumbers. They may further multiplyby budding, giving rise to conidia, ora delicate mycelium may be formedfrom which conidia are abstricted ( Til-letia), A supply of conidia is produced by these means in dung decoctionand other nutrient solutions, and no doubt in the damp, manur
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectfungi, bookyear1922
