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酵母细胞最常见的繁殖方式是出芽繁殖,在芽体又称芽孢子形成时,现在母细胞将要形成芽体的部位通过水解酶的作用使细胞壁变薄,大量的新细胞物质堆积在芽体的起始部位上,待逐步长大后在与母细胞的交界处形成一块由葡聚糖、甘露聚糖和几丁质组成的隔壁。成熟后两者分离,在母细胞上留下一个芽痕(bud scar),相应的在子细胞上留下
蒂痕
(birth scar),少有直译成诞生痕。