This shows a synchronous development of megaspore and pollen chamber.
反映大孢子发育和贮粉室发生的同步性。
It is not synchronous highly that the meiosis of pollen mother cells and the development of microspore in the same anther but different pollen sac and in the same anther chamber.
同一花药不同花粉囊相同一药室，花粉母细胞减数分裂和小孢子的发育，并不是高度同步的。
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