nucellus
珠心
常用释义
英音[ njuːˈseləs ]
美音[ ˈnjʊseləs ]
变形
复数:
nucelli
基本释义
- n. [植] 珠心
例句
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1·The integument grew fast and overgrew the nucellus.珠被生长较快，并逐渐包围珠心。
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2·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。
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3·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。
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4·There is no starch in the nucellus, integuments and the antipodal cells, the persistent synergid contains a large amount of starch.珠心、珠被、反足细胞都不含淀粉。 宿存助细胞具丰富的淀粉。
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5·There were only two layers of nucellus which had abundant cytoplasm and reserved substance, and were consumed at the stage of late heart-shaped embryo.珠心细胞只有两层，细胞核大，胞质丰富，内含贮藏物质，至心形胚期逐渐解体。
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6·After years of observation and assessment on the top-grafting plants of nucellus seedlings, considerable quality variations were found among nucellus embryo plants.对珠心苗高接植株多年观察及品质鉴定，认为珠心胚植株在品质上表现较大差异。
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7·Upon further increase of the exogenous hormone concentration, new ovule primordia could be formed from the proliferated nucellus cells, which further developed into many new ovules.进一步提高外源激素浓度，珠心细胞又可以分化出新的胚珠原基，进一步长大以后发育成许多新的胚珠。
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8·About weeks after pollination, the tip cells of nucellus broke and secreted liquid into ovular canal, which promoted pollen movement to the nucellus and played important role for pollen germination.传粉后约周，珠心顶端破裂，分泌物进入珠孔道，并与珠被分泌物共同作用于花粉，使花粉向珠心移动。
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9·About 4 weeks after pollination, the tip cells of nucellus broke and secreted liquid into ovular canal, which promoted pollen movement to the nucellus and played important role for pollen germination.传粉后约4周，珠心顶端破裂，分泌物进入珠孔道，并与珠被分泌物共同作用于花粉，使花粉向珠心移动。