The integument grew fast and overgrew the nucellus.
珠被生长较快, 并逐渐包围珠心。
Soluble polysaccharides was observed in the nucellus cells.
珠心细胞中只见到可溶性多糖。
The nucellus is usually degraded and absorbed as the endosperm develops.
珠心通常在胚乳发育时被分解和吸收。
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。
The female archesporium differentiates from the single cell under the epidermis of nucellus.
雌性孢原处于珠心表皮之下，为单细胞。
The archesporial cell below nucellus epiderm functions directly as the megaspore mother cell.
珠心表皮下的雌性孢原直接发育为大孢子母细胞。
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。
The nucellus cells could differentiate the sexual cell under quite low concentration of exogenous hormones.
珠心细胞在低浓度的外源激素条件下可以分化性细胞。
Mature ovule was componented of nucellus, integument, bead handles, combined point and composition of the nucellar beak.
成熟的胚珠是由珠心、珠被、珠柄，合点和珠心喙组成。
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