您要查找的是不是：
- embryo sac tube 胚囊管
- Both polygonum type and panicum type embryo sac have embellum. 有性生殖和无孢子生殖的胚囊中均有胚珠附器存在;
- Abnormal development was observed at tetrad and mature embryo sac. 在四分体和成熟胚囊时期观察到了异常发育现象。
- Genesis of megaspore and development of embryo sac in Carica papaya L. 番木瓜的大孢子发生与胚囊发育。
- These abnormalities would cause the abnormal structure of mature embryo sac. 这些异常可能最终导致多种结构异常成熟胚囊的形成。
- While in the Angiophyta the female gametophyte is simply the EMBRYO SAC. 被子植物门的雌配子体为简单的胚囊；
- The development of embryo sac in Prunus americana Marsh var. is often abnormal. 鸡心李(Prunus americana Marsh var.;)
- The chalazal end megaspore develops into the embryo sac mother cell. 合点端大孢子发育为胚囊母细胞。
- With embryo sac haustorium in chalazal end,the embryo sac is Endymion type. 胚囊发育类型为英地百合型 ,合点端形成胚囊吸器。
- Embryo sac elongated at 1-nucleate stage by fusion of small vacuoles. 功能大孢子时期核糖体密集, 线粒体和质体分裂以增加数目；
- The endosperm is usually triploid and develops from the primary endosperm nucleus, the triploid nucleus resulting from the fusion of one of the male gametes from the pollen tube with the polar nuclei in the embryo sac. 胚乳通常是三倍体，由初生胚乳核发育而来，三倍体核来源于花粉管中的雄配子与胚囊中两个极核的融合。
- The central portion of an ovule in which the embryo sac develops; the megasporangium. 珠心胚珠的中心，胚芽囊在此发育；大孢子囊
- Enclosure of the nucellus by the integuments is incomplete, the embryo sac or, in gymnosperms, to the archegonium. 珠被并不是将珠心完全封闭，而是留有珠孔以便受精时花粉管进入胚囊，或裸子植物的藏卵器。
- Starch grains present in the embryo sac and placenta are utilized by the embryo. 存在于胚囊和胎座中的淀粉粒为胚胎所利用。
- The central portion of an ovule in which the embryo sac develops;the megasporangium. 珠心胚珠的中心，胚芽囊在此发育;大孢子囊
- CYTOLOGICAL OBSERVATIONS ON EMBRYO SAC AND FERTILIZATION IN PRUNUS AMERICANA MARSH VAR. 鸡心李胚囊及受精的观察
- Function megaspore is in the chalaza and the monosporic embryo sac is chenopodiad type. 功能大孢子位于合点端，大孢子发育为蓼型胚囊。
- Synergid cells Two haploid cells located near the egg cell at the micropylar end of the embryo sac in flowering plants. 助细胞：存在于开花植物胚囊内，是位于珠孔端的卵细胞两侧的两个单倍体细胞。
- Most of ovaries in the mutant were without embryo sac,and the sac full of par enchyma cells. 大约30%25的颖花具有两个以上的子房。突变体完全不能结实。
- The mature embellum cells in aposporous embryo sac were larger than that in sexual embryo sac. 存在发达的胚珠附器是水蔗草无孢子生殖胚囊的特点之一。
