花生胚胎发育的形态学观察

本文描述不用塑料薄切片,光学显微镜和扫描电镜等技术观察花生((?))胚胎发育过程的形态变化,包括受精后3～6天的发育情况。 花生开花当天凌晨3～4时,花蕾虽未开放而花药已经开裂并授粉。花药开裂后20～21 h卵细胞开始受精。果(?)入土前原胚发育极缓慢,入土后原胚迅速生长。15天形成拳状原胚并开始分化,45天左右花生胚胎分化基本成熟,胚芽的顶芽具有5～6片幼叶,子叶节侧芽具有第1花序原基。端豆分化比基豆迟,前者较后者分化迟一片幼叶。

MORPHOLOGICAL OBSERVATION OF PEANUT(Arachis hypogaea L.) EMBRYONIC DEVELOPMENT

Process of peanut embryonic development,including zygotic development 3-6 days after fertilization was observed with plastic thin section microscopy and scanning electron microscopy in this study.The observed results showed that anther sacs of peanut bursted before the flower opened at 3-4 o' clock in the early morning,and possibly self-pollinated.About 20-21 hours after anther bunted,the egg cell was fertilized.Before peg penetrated into the soil,the development of zygote was rather slowly,however,the zygote developed into proembryo and grew up quickly after the peg entered the soil.Proembryo began differentiating about 15 days after an thesis,and the differentiation of embryo completed in 25-30 days later,in which 5-6 young leaves and the first inflorecence primordium were observed.Also,the development of apex seed was about one young leaf slower than that of base seed.