Under the condition of suspension culture, cell cluster were formed first, and then one or several embryoids were induced from embryogenic cultures.
在悬浮培养条件下，杨树细胞先形成细胞团，再由一些胚性细胞团发育形成一个或几个胚状体。
2
The exogenous auxin and cytokinin are necessary to induced differentiation and proliferation of cells of culture in vitro. 2,4-D is an important hormone of induced embryogenic calluses.
The central vacuole began to disappear, and cytoplasm with abundant organelle accumulated starch in some of microspores having embryogenic ability on transfer to culture.