The vacuolated cytomplasm could not provide energy for mitotic division, which made microspores keep at that stage.At last single nucleus microspores disappeared.
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释义
单核小孢子在发育过程中由于细胞质液泡化,不能为核有丝分裂提供能量,使小孢子停滞在单核期,最终消失。
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