野生欧洲李花芽形态分化研究

A Study on the Flower Bud Morphological Differentiation of Wild European Plum

以伊犁地区新源、巩留两地的原生野生欧洲李为试材,通过常规石蜡切片法对其花芽形态分化过程进行观察研究。结果表明,野生欧洲李的花芽形态分化始于6月下旬,可分为未分化期、花原基分化期、萼片原基分化期、花瓣原基分化期、雄蕊原基分化期及雌蕊原基分化期6个时期。从6月22日绝大多数花芽处于未分化期到9月2日绝大多数花芽处于雌蕊分化期,经历了约70 d。花芽形态分化存在各时期重叠交错现象,每个时期没有十分明显的界限,都是逐步分化的,花芽分化盛期集中在7月上旬至9月上旬。10月初雌蕊原基分化基本完成。新源、巩留两地各阶段花芽分化的细胞特征基本一致,但分化时期存在一定差异,巩留的花芽分化同新源比较相对较晚,分化过程较分散。

The paraffin section of flower bud morphological differentiation was observed to study the differentiation process of Wild European Plum.The results are as follows：Wild European Plum flower bud morphological differentiation started in the last ten-day period of June.The whole process can be divided into pre-differentiation stage,the floral primordial differentiation stage,sepal primordial differentiation stage,petal primordial differentiation stage,stamen and pistil late primordial differentiation stage.From June 22,the majority of flower buds were in pre-differetiation stage,on Sept.2 the majority of flower buds were in pistillat differentiation stage,the whole process approximately continues for 70 day.There was intersectional phenomenon in each differentiation stage.The full blooming of differentiation concentrated at the first ten-day period of July to the first ten-day period of September.Pistil primordial differentiation stage was basically completed at the beginning of October.