极核细胞
极核细胞-
成熟的胚囊是五核胚囊：由近珠孔端的卵细胞和两个助细胞以及两个中央极核细胞构成的。
The mature embryo sac was one with five nucleus , i.e. , egg apparatus and two-nucleus central cell .
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同源四倍体水稻胚乳发育：极核融合和胚乳细胞化
Endosperm Development in Autotetraploid Rice : The Fusion of Polar Nuclei and the Formation of Endosperm Cell Wall
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观察白皮黄瓜成熟胚囊发现，在胚囊中央观察到多个类极核，珠心组织细胞离散、变形，大孢子囊边缘不规则。
It was also observed in white cucumber that there were multipolar nucleus-like in the center of mature embryo sac , nucellus cells were dispersed and the edge of some megaspore sacs were irregular .