| 1. | The transformation system would be a valuable tool for flower development and double fertilization studies
这个优良的转化系统为应用基因工程手段研究花发育和双受精机制奠定基础。 |
| 2. | Gymnosperms lack endosperm and the precise double fertilization characteristic of the angiosperms , although some show a primitive form of it
尽管裸子植物还保留有某些被子植物的基本形态，但它没有被子植物所特有的胚乳以及双受精现象。 |
| 3. | The pollen grain germinates on a special extension of the carpel , the stigma , and double fertilization results in a diploid zygote and triploid ( usually ) endosperm nucleus
花粉粒在柱头上萌发，双受精导致双倍体的合子和三倍体的胚乳形成。 |
| 4. | We transferred the hetero - logous gene into toreniafournieri successfully . this method laid a foundation for study of double fertilization of angiosperm by transgenic tecnology
我们将外源基因成功地导入蓝猪耳，为利用转基因的手段研究被子植物受精和胚囊发育打下基础。 |
| 5. | Double fertilization the fusion of one pollen nucleus with the egg to form the zygote and of the other pollen nucleus with a polar nucleus to form the triploid endosperm nucleus
双受精：指花粉粒中的一个精子与胚珠中的卵细胞结合形成受精卵，另一个精核与极核结合形成三倍体的胚乳核。 |
| 6. | Obstacles to progress are : ( 1 ) the double fertilization of most angiosperms occurs internally , deep within ovary tissues , as a result it is very difficult to investigate the truth
这方面的研究之所以比较滞后，一方面是由于大多数被子植物胚囊深藏于子房内，为处理和观察带来很大困难。 |
| 7. | As an effective evolution strategy of angiosperms , double fertilization can enhance the survival of the embryos , seeds and seedlings in which endosperms play a key role in the development of seeds and embryos
摘要双受精是被子植物的一个有效的进化策略，增加了胚和种苗成活的机会，其中胚乳在胚以及种子发育中至关重要。 |
| 8. | Therefore , toreniafournieri is a very suitable model plant for studies of double fertilization in living material . we transferred the fusion gene ofgfp : mtn to toreniafournieri by leaf disc transformation mediated by agrobacterium and gain transgenic plant
我们将嵌合基因gfp : mtn通过叶盘法导入蓝猪耳，探索了蓝猪耳遗传转化的方法和转基因苗的再生条件，建立了成熟的蓝猪耳转化系统。 |
