YM shift Many fungi that cause diseases in humans and animals, are dimorphic: they have two forms 1. The yeast(Y)form in the animals 2. The mold or mycelial form(M) in the external enviroment Plant-associated fungi: the mycelial form in the plant the yeast form in the external enviroment
YM shift • Many fungi that cause diseases in humans and animals, are dimorphic: they have two forms. • 1. The yeast (Y) form in the animals • 2. The mold or mycelial form (M) in the external enviroment. • Plant-associated fungi: the mycelial form in the plantl the yeast form in the external enviroment
yeasts SPRSAYINPAICAMNARLIN- 9) Unicellular fungus, spherical to egg shaped, single nucleus and reproduces either asexually by budding and transverse division or sexually through spore formation No flagella, possess most of the other eucaryotic organelles
yeasts • Unicellular fungus, spherical to egg shaped, single nucleus and repriduces either asexually by budding and transverse division or sexually throough spore formation • No flagella, possess most of the other eucaryotic organelles
Yeasts: unicellular fungi (ascomycetes e② e Division buddin Do not form filaments Some form filaments Some can mate
Yeasts: unicellular fungi (ascomycetes) • Division: budding • Do not form filaments • Some form filaments • Some can mate
酵母的子囊和子囊孢子 些酵母菌,如啤酒酵母,它们的有性繁殖是产生子囊 和子囊孢子。 ⊙ 酵母的二倍体 减数分裂后产生 原细胞发育成子囊 营养体细胞 4个单倍体的核 里面有4个子囊孢 子,将来发育成单 倍体营养体细胞
匍匐枝 真菌菌丝体假根 吸器 的分化 附着枝 附着胞 营养菌丝 菌核 分化 菌索 菌环 菌网 个体形态 菌丝体 孢子囊 分生孢子头 无性分生孢子座 群体形态 气生菌丝 分生孢子器 分化 闭囊壳 (子实体)有性「子囊果 子囊壳结构 子囊盘 担子 繁殖