论文部分内容阅读
紫李子的花粉发育及胚珠，胚囊的形成，是在春季萌芽过程中完成的．在花粉的发育过程中，花粉母细胞形成阶段较长，减数分裂期较短．在减数分裂期，第１次减数分裂后，在两个子核之间不产生细胞壁，不形成子细胞。第２次减数分裂后，４个子核之间产生细胞壁，形成四分体。花粉发育的同时，胚珠胚囊形成，各个发育时期与花芽的外部形态存在着密切的相关注。
Violet plum pollen development and ovule, embryo sac formation, is completed in the spring budding process. During the development of pollen, pollen mother cells formed longer and the meiosis period was shorter. At the meiosis stage, after the first meiosis, no cell wall is created between the two daughter nuclei and no daughter cells are formed. After the second meiosis, the cell walls form between the four daughter nuclei and form a tetrad. At the same time of pollen development, the formation of ovule embryo sac, the developmental stages and the external morphology of flower buds are closely related to each other.