双受精

开花后3～6h，发生双受精作用。

The double fertilization proceeded normally 3-6 h after anthesis .

开花后21h，双受精已完成。

At 21 h after anthesis , double fertilization is finished .

单瓣紫花木槿开花第4d开始进行双受精，胚的发育历经球形原胚、心形胚、鱼雷胚、子叶胚及成熟胚各时期，胚乳核型，种子成熟后无胚乳；

The double fertilization is observed in the simple flower 4 days after blossom , and the mature embryo forms after stages of globular , heart-shaped , torpedo-shaped and cotyledon embryos .

从传粉到受精约100d，正常双受精。

The interval between pollination and fertilization is about 100 days and the normal double fertilization has been observed .

授粉70d，常温下的蝴蝶兰植株已完成雌配子体发育和双受精，而低温处理的蝴蝶兰仍未完成大孢子的发生过程。

Although the megagametophyte formed and even the double fertilization had been finished 70 days after pollination at normal temperature , the megasporogenesis had not yet been finished at low temperature .

双受精发生于授粉后10&15天。

Fertilization proceeds on the 10th to 15th day after pollination .

水稻双受精过程的细胞形态学及时间进程的观察

Cytological Observation of Double Fertilization and Its Duration in Oryza sativa

八倍体小黑麦双受精进程的形态学观察

The morphological observation on the double fertilizing process of 8x Triticale

浅谈被子植物双受精的多媒体教学设计

Multimedia Teaching Design of ″ Angiosperm Double Fertilization in Biology Teaching ″

被子植物双受精包括精-卵、精子-中央细胞两个融合过程。

The double fertilization characteristic of angiosperms involves two separate fusion events .

罗汉果双受精过程的细胞学观察

Cytological observation of the double fertilization in Siraitia grosvenori

双受精属有丝分裂后型；

Double fertilization is of anaphase type of mitosis .

在双受精过程中，多次观察到有多条花粉管进入胚囊和多精入极核现象。

During the double fertilization , many pollen nucleus .

授粉后5&6日，观察到双受精过程。

The double fertilization process was observed 5 - 6 days after pollination .

夏蜡梅的双受精和种子形成

Double fertilization and seed formation of Calycanthus chinensis

同源四倍体水稻双受精过程的细胞学观察

Cytological observation on double fertilization of autotetraploid rice

正常的双受精过程缓慢而且频率低。

The frequency of double fertilization is low .

橡胶树双受精作用的研究皮炎芽生菌病的临床和病理

Double Fertilization of Hevea brasiliensis Study of pathological changes and clinical features of dermatitis blastomycosis

钙在被子植物双受精过程的作用一直是植物学家的兴趣热点。

Functions of Calcium during fertilization of angiosperm is one of research focuses for botanists .

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。

The transformation system would be a valuable tool for flower development and double fertilization studies .

根据观察，在北京地区，软毛猕猴桃的双受精大多发生在授粉后30&72小时内。

In Beijing area the double fertilization of Actinidia chinensis occurred 30 & 72 ho - urs after pollination .

黄芪胚胎学研究&双受精作用胚与胚乳的发育

The Embryologic Studies on ( Astragalus Membranaceus )( Fisch . ) Bge . - Fertilization the Development of Embryo and Endosperm

根据猕猴桃受精前后子房差异蛋白表达谱比较，筛选出与双受精相关的子房蛋白。

Compared with differences ovary proteins expression before and after Fertilization , we can filter out the double fertilization of ovary proteins .

观察了葡萄双受精过程中雌雄性核的融合。

We made an observation of the process of the fusion of male and fe - male nuclei in the double fertilization Vitis .

由于双受精深藏于母体组织中进行，长期以来一直是植物有性生殖研究中的难点。

The process occurs deep within maternal tissues , and therefore , has been a particularly difficult field in the study of sexual plant reproduction .

胚珠发育异常一方面不能形成正常功能的胚囊（及雌配子体），另一方面不能在双受精过程中引导花粉管的正常延伸和进入珠孔，从而导致雌性不孕。

Abnormal ovule development could not form the normal functional sac , on the other hand could not guide the pollen tube extension and enter into the ovule .

在检查过的310个子房中，17个（5.5%）发生了双受精，产生了胚和胚乳；

Double and single fertilization were observed in the pollinated florets of the 310 ovaries examined 17 ( 5.5 % ) had double fertilization and had embryo and endosperm .

着重介绍了被子植物的双受精作用、花粉柱头间的识别及花粉壁蛋白和柱头表膜蛋白的一些研究情况。

The phenomena of double fertilization in angiosperms , recognition between pollen and stigma and some researches on pollen-wall proteins and stigma pellicle proteins were briefly discussed in this article .

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。

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 .

精卵融合与精细胞和极核的融合几乎同时完成，以雌、雄性核仁完全融合作为双受精结束的标志，属于有丝分裂前配子融合类型。

Sperm-egg fusion and sperm-polar nuclei fusion are almost simultaneously , the fusion of female and male nucleoli mark the end of double fertilization ; belong to Pre-mitotic type of gamete fusion .