| 1. | 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。
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| 2. | The embryo sacs observation is one of the main study method for embryology
摘要胚囊观察是植物胚胎学的主要研究方法之一。
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| 3. | Bisporic embryo sac
双孢胚囊
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| 4. | Frequencies of apomictic embryo sacs were the highest in winter and summer respectively in two years
两年中，无融合生殖胚囊出现的频率分别在冬季和夏季最高。
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| 5. | It is concluded that embryo sac sterility was the main reason for highly stable seedless characteristic of lipeng no . 2 cultivar
因此，胚囊高度败育是丽? 2号产生无核的主要原因。
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| 6. | Observation by paraffin section showed that lipeng no . 2 embryo sac mother cells were almost entirely degenerated during megasporogenesis
切片观察发现，丽? 2号胚囊母细胞在四核期已完全退化。
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| 7. | 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。
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| 8. | After we learnt enzymatic isolation method of yang hong - yuan and zhou chang , we explored to develop a pressure cover glass method of observation on embryo sacs
我们在学习了酶解法之后，摸索研究了一种观察甜菜胚囊的压片法。
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| 9. | Illiensis type and t . tetraphylla type . there are more than one types of embryo sac in 3 species , sush as t . illiensis , t . heteropetala and t . heterophylla
在所报道的5组共45种郁金香属植物中，发现该属植物的胚囊发育类型具有一定的系统学意义。
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| 10. | Antipodal cells the three haploid cells found in the embryo sac of seed - bearing plants that migrate to the chalaxal end of the sac farthest from the micropyle
反足细胞：胚囊三次分裂形成卵细胞，助细胞和极核等，其中位于合点端的三个单倍体细胞称反足细胞。
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