中央核 central nucleus， secondary nucl- eus

互联网2013-11-14

579

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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