. Fifi. l^G.—Sclerotinia oxycocci on Faccinivm Oxycoccvs. Young shoot of Cran- berry with mature conidial cushion and diseased upper leaves. A, Pfsira-cup developed from a sclerotial fruit; numerous rhizoids proceed from the base of the stalk. B. Ascospores in stages of germination. C, Conidia in germination, with remains of disjunctors still attached. (After Woronin.) to several primordia or horn-like stalks, on the extremity of which an apothecium is afterwards formed. Ehizoids are pro- duced at the base of the stalk and attaching themselves to the ground act as supports and organs of nutrit
. Fifi. l^G.—Sclerotinia oxycocci on Faccinivm Oxycoccvs. Young shoot of Cran- berry with mature conidial cushion and diseased upper leaves. A, Pfsira-cup developed from a sclerotial fruit; numerous rhizoids proceed from the base of the stalk. B. Ascospores in stages of germination. C, Conidia in germination, with remains of disjunctors still attached. (After Woronin.) to several primordia or horn-like stalks, on the extremity of which an apothecium is afterwards formed. Ehizoids are pro- duced at the base of the stalk and attaching themselves to the ground act as supports and organs of nutrition. The apothecia contain both asci and paraphyses ; the latter are septate, dichoto- mously branched filaments, with club-shaped ends, and coated with a brown resinous substance. The asci have a canal at one end through which are ejaculated eight spores of almost equal size. These produce sporidia in water; in nutritive solutions, however, they form a septate mycelium with conidia. The ascospores bring about infection by means of one or two germ-tubes which penetrate the outer membranes of young
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherl, booksubjectfungi
