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汉语拼音：zhū xīn

薄壁的薄壁组织细胞团构成胚珠本体的中央和主要部分，在他们中间含有胚囊，其外围被一层或多层被膜所包围。

珠心 [zhū xīn]

• 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。

• A female gametophyte of the female gametophyte in the sporangium ovule is the heart of the beads.

  产生雌配子的雌配子体在大孢子囊即胚珠的珠心处发育。

• 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。

• Programmed Cell Death of the Nucellar Cells in Ginkgo biloba L.

  银杏珠心组织的细胞程序化死亡。