极核
The polar nuclei autonomously developed into endosperm without fertilization and the egg apparatus ultimately degenerated.
卵器最终退化,极核不经受精自发形成胚乳.
However, the polar nuclei might develop the normal endosperm as long as they had been fertilized.
但是, 其极核必需经过受精过程才能发育为胚乳.
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