nucellus

nucellus

美 [nu's?l?s] 　英 [nu:'sel?s]

• n.【植】珠心
• 網絡一整團珠心；珠心細胞；胚珠珠心

詞形變化

復數：nucelli  

英漢解釋

n.

1. 【植】珠心

英英解釋

n.	1. the central part of a plant ovule in which the embryo develops

例句

A minute structure in seed plants, containing the embryo sac and surrounded by the nucellus, that develops into a seed after fertilization.

種子植物的一個小的結構，含有胚囊并被珠心所包圍，施肥后長成種子。

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組織細胞異常加厚，多糖物質出現異常積累。

The result indicated that the corn is an anatropous ovule, thick nucellus embryo sac.

結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 .

另外的粉管核會在花粉管穿過珠心時發生分裂。

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結構。

Food materials may be stored in a special tissue derived from the nucellus , called the perisperm.

營養物質可以貯藏于由珠心產生的一種特殊組織，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內恢復活動，四月形成二個不等的雄配子。

Ultrastructural Study of Nucleus Transfer in Nucellus of Pennisetum squamulatum

非洲狼尾草珠心細胞核穿壁運動超微結構研究