. Introduction to the study of fungi, their organography, classification, and distribution for the use of collectors . o multiply themselves manytimes by budding, after the manner of yeast-spores, which isthe term applied to them by Brefeld, but liable to misinter-pretation. In order the better to comprehend the process, itmay be detailed as observed in Tilletia (Fig. 120). This parasiteproduces its teleutospores within the grains of wheat, and isknown to farmers as appearance of the grainsexternally is very littlechanged, but slightly darkenedin colour, and when crushedare seen to be
. Introduction to the study of fungi, their organography, classification, and distribution for the use of collectors . o multiply themselves manytimes by budding, after the manner of yeast-spores, which isthe term applied to them by Brefeld, but liable to misinter-pretation. In order the better to comprehend the process, itmay be detailed as observed in Tilletia (Fig. 120). This parasiteproduces its teleutospores within the grains of wheat, and isknown to farmers as appearance of the grainsexternally is very littlechanged, but slightly darkenedin colour, and when crushedare seen to be filled witha sooty, rather fetid teleutospores are globose,dark coloured, almost black,and the surface minutelyreticulated. When placed inwater they germinate in aboutforty-eight hours. A germ-tube is emitted from a verysmall germ-pore, but it doesnot attain any considerablelength; and this germ-tubeconstitutes the promycelium,into which the contents of theparent spore pass and retreatto the extremity, and areof a transverse septum,about the summit, andfirst promycelial spores,and colourless, to the. Fig. 120.—Tilletia s^ov^a in germination,ft, producing a promycelium, ^j ; b,primary spore with promycelium, 2>ibearing conidia, of which some areconjugating ; c, conjugated gonidia ingermination, with secondary gonidiumat s. After De Barv. are shut off by the formationTuberculations are soon manifestthese by lengthening become theThey are thread - like, curved,number of from four to a fully developed they are cut off from the pro-mycelium by a septum at the base. Soon afterwards theseprimary spores will be seen to connect themselves, mostly inpairs, by a transverse connective, performing an act of conjuga-tion. These conjugated primary spores are often separatedfrom the promycelium, but they may remain for a long timeattached. In due time liudding takes place, and the budsbecome converted into cylindrical curved secondary spores, the 256 INTRODUCTION
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Keywords: ., bookauthorcookemcm, bookcentury1800, bookdecade1890, bookyear1895
