珠被生长较快，并逐渐包围珠心。
结果表明，3株实生苗均为珠心苗。
雌性孢原处于珠心表皮之下，为单细胞。
The female archesporium differentiates from the single cell under the epidermis of nucellus.
属薄珠心，胚囊形成时珠心细胞全部消失。
孢原细胞处于珠心表皮之下，直接起大孢子母细胞的功能。
A single archesporium differentiates immediately below the nucellar epidermis, it functions directly the megaspore mother cell.
珠心、珠被、反足细胞都不含淀粉。宿存助细胞具丰富的淀粉。
There is no starch in the nucellus, integuments and the antipodal cells, the persistent synergid contains a large amount of starch.
合点端的胚乳细胞则侵入合点珠心组织，为胚进一步发育提供营养。
With the embryo development, most of the endosperm degenerated, and the cells near chalaza entered the chalaza, digested it and further nourished the embryo.
由背部维管束运来的养分经珠心突起先卸至质外体，其后再由糊粉层细胞吸收；
The nutrient transported from dorsal vascular bundles first unloaded into apoplast via nucellar projection, then was absorbed by aleurone layer cells;
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。
After years of observation and assessment on the top-grafting plants of nucellus seedlings, considerable quality variations were found among nucellus embryo plants.
子房具胚珠20—23枚，胚珠横生，珠被二层，薄珠心，孢原细胞直接起大孢子母细胞作用。
The ovary contains 20-23 ovules. The ovules are hemitropous, with 2 integuments, tenuinucellate and the archesporial cell functions directly as the mega-spore mother cell.
当胚乳游离核达到1 6或32个时，最早的珠心胚原始细胞由靠近胚囊珠孔端的珠心细胞分化形成。
When the free nuclei of the endosperm were 16 or 32, the nucellar embryo initial (s) originated from the nucellar cells near the micropylar end of the embryo sac.
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。
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。
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.
通过柑桔胚胎发育观察表明，授粉后50天左右，胚囊内仅有一个合子胚，未见珠心胚侵入胚囊，为单独分离合子胚培养的最好时期。
Observation of citrus embryo development showed that in 50 days or so after pollination there was only one zygotic embryo in the embryo sac, and nucellar embryo was not yet invaded.
该贺卡的正面印有“生日快乐”字样，并且包括一个附在上面的印有“微笑”字样的心形木珠。
The front of the card says Happy Birthday To You and includes an attached bead in the shape of a heart with the word Smile printed on it.
该贺卡的正面印有“生日快乐”字样，并且包括一个附在上面的印有“微笑”字样的心形木珠。
The front of the card says Happy Birthday To You and includes an attached bead in the shape of a heart with the word Smile printed on it.
应用推荐