单词nucellus
n.: 【植】珠心
网络: 一整团珠心；珠心细胞；胚珠珠心
【植物;植物学】珠心
球心
复数：nucelli
A minute structure in seed plants, containing the embryo sac and surrounded by the nucellus, that develops into a seed after fertilization.
种子植物的一个小的结构，含有胚囊并被珠心所包围，施肥后长成种子。
Cell walls were getting thick in nucellus cells near the female gametophyte and polysaccharides accumulated abnormally. 2.
另外不育系胚珠珠心组织细胞异常加厚，多糖物质出现异常积累。
The result indicated that the corn is an anatropous ovule, thick nucellus embryo sac.
结果表明玉米是倒生胚珠，厚珠心胚囊。
The tube nucleus disintegrates as the pollen tube penetrates the nucellus .
另外的粉管核会在花粉管穿过珠心时发生分裂。
integument A layer surrounding the nucellus in the ovules of gymnosperms and angiosperms.
是裸子植物和被子植物的胚珠中包裹珠心的结构。
Food materials may be stored in a special tissue derived from the nucellus , called the perisperm.
营养物质可以贮藏于由珠心产生的一种特殊组织，叫外胚乳。
In the second year, the resting pollen tube revives its activity in the nucellus towards the March.
第二年三月，休眠的花粉管在珠心内恢复活动，四月形成二个不等的雄配子。
Ultrastructural Study of Nucleus Transfer in Nucellus of Pennisetum squamulatum
非洲狼尾草珠心细胞核穿壁运动超微结构研究