generative cell
- generative cell的基本解释
-
-
生殖细胞
- 更多网络例句与generative cell相关的网络例句 [注：此内容来源于网络，仅供参考]
-
The ultrastructure characters of pollen grain in Brassica napus are:1There are vacuoles in cytoplasm but no starch grain in uniceelluar pollengrain.2The veget- ative nucleus of bicellular pollen grain is generally spheroidal;while the generative cell is spinde-shaped,with a big nucleus,thin layer of cytoplasmand few cell orgens,no cell wall.3In three-celled pollen grain the sperm cell is separated from the cytoplasm of vegetative cell by two layers of plasmic membrances.
Brassica napus的花粉粒，在不同发育时期超微结构的特征如下：1单胞花粉粒有一个球形的细胞核和明显的核仁，细胞质内出现液泡，缺少典型的淀粉粒。2双胞花粉粒的营养核多为球形。生殖细胞纺锤形，无细胞壁，细胞核比例大，细胞质呈薄层，细胞器少。3三胞花粉粒有一个裂片状的营养核和两个纺锤形的精细胞，精细胞无壁，以两层质膜与营养细胞的细胞质相隔。
-
Generative nuclei The two gametic nuclei formed by the division of the generative cell in the pollen tube of angiosperms.
雄原核：在被子植物花粉管中的生殖细胞分裂成两个配子的核。
-
During two-celled pollen grain stage, they were accumulated on the wall of the generative cell. After the generative cell came into the vegetative cell, ppts largely disappeared.
二胞花粉刚形成的生殖细胞表面呈现大量的ATPase反应颗粒，当生殖细胞脱离花粉内壁移入营养细胞，ATPase反应颗粒基本消失。
- 更多网络解释与generative cell相关的网络解释 [注：此内容来源于网络，仅供参考]
-
generative cell：生殖细胞
成熟的小孢子具有2个退化的原叶细胞(prothallial)、1个大的管细胞(tube cell)和1个较小的生殖细胞(generative cell),外壁向两侧突出形成气囊. 小孢子囊破裂后,花粉粒散出,随风飘扬. 在石炭纪、二叠纪的地球植被中,除了外貌像蕨的种子蕨之外,
-
generative cell：配子
generation 世代 | generative cell 配子 | genesis 发生
-
generative cell：增殖細胞
generative apogamy 有性無配子生殖 | generative cell 增殖細胞 | generative time 繁殖期