单核晚期小孢子经培养后，具胚状体发生能力的细胞中央液泡消失，积累淀粉，含丰富细胞器。

The central vacuole began to disappear, and cytoplasm with abundant organelle accumulated starch in some of microspores having embryogenic ability on transfer to culture.

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方法：采用经具核梭杆菌LPS刺激的单核细胞培养上清作用于体外培养的人牙髓细胞，通过OD值测定，观察单核细胞培养上清对人牙髓成纤维细胞碱性磷酸酶（ALP）活性的影响。

Methods:The culture supernatant of monocytes stimulated with Fn LPS was applied to human dental pulp cell in vitro, and activity of ALP in human dental pulp fibroblast was monitored by OD test.

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