中央核 central nucleus, secondary nucl- eus
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中央核 central nucleus, secondary nucl- eus 被子植物的胚囊核之一,由二极核融合而成,多数位于胚囊的中心。后来由雄核受精而成胚乳核,但未受精的核内由于有丝分裂,DNA的含量往往异常增多。
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