什么是酵母菌?Yeastsarefungiwithvegetativestatesthatpredominantlyreproducebybuddingorfission,prisedmainlyofsinglecells,,以芽殖或裂殖方式进行无性繁殖,有性生殖阶段不产生子实体。致病酵母菌引起的症状及其生境酵母菌分类95属,723种(TheYeats,aTaxonomicStudy,4thedn.,1998)ycetousYeasts(子囊菌酵母)ycota “ycetes” hromycetales Taphrinales Protomycetales Pneumocystidales ycetes haromycetales (11families)BasidiomycetousYeasts(担子菌酵母)Teleomorphictaxa “simple”septalpores ,transverselyseptate Ustilaginales Sporidiales Platygloeales Septobasidiales Atractiellales Agaricostilbales ,nonseptate Graphiolales ,nonseptate Cryptobasidiales ExobasidialesBasidiomycetousYeasts(担子菌酵母)Teleomorphictaxa ,parenthesomecupulate “cruciate-septate” Tremellales FilobasidialesAnamorphictaxa Sporobolomycetaceae aeae传统分类方法haromycespastorianus单极芽殖(monopolarbudding):细胞只在一端出芽二极芽殖(bipolarbudding):出芽只局限于母细胞相对的两端多边芽殖(multilateralbudding):出芽发生于细胞上的多个位点裂殖(fission):,示芽殖细胞(B)和芽痕(箭头) :双倍体的营养细胞直接转化为子囊,:两个单倍体营养细胞结合发生质配和核配,
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