摘要
采用石蜡切片技术,对不育的丹桂(Osmanthus fragrans ‘Dangui’)和可育的籽银桂(Osmanthus fragrans ‘Ziyingui’)花芽分化的过程进行了研究。结果表明,桂花(Osmanthus fragrans Lour.)花芽形态分化可分为花芽分化初始期、总苞分化期、花原基分化期、顶花花被分化期、雄蕊分化期和雌蕊分化期6个阶段。雄蕊的发育在丹桂和籽银桂之间基本没有区别,都能形成完整的花粉囊和成熟的花粉粒。但是,雌蕊的发育在可育的籽银桂与不育的丹桂之间存在明显差异。根据花芽分化的过程证明,丹桂的不育是由于雌蕊发育不正常导致的。
The process of floral-bud differentiation in Osmanthus fragrans ＇Dangui＇ and O. fragrans ＇Ziyingui＇ was studied by the paraffin method. The process can be divided into 6 stages of differentiation： early, involucrum, single flower, perianth, androecium, and gynoecium. ＇Ziyingui＇ and ＇Dangui＇ do not differ in androecium development; stamens can develop into normal pollen sacs and ripe pollens. However, the fertile ＇Ziyingui＇ and sterile ＇Dangui＇ do differ in gynoecium development. Floral-bud differentiation study suggests that the abnormal pistil development of ＇Dangui＇ leads to its sterility.
出处
《植物学通报》
CSCD
北大核心
2007年第5期620-623,共4页
Chinese Bulletin of Botany
基金
国家自然科学基金(No.30670137)
河南省高校创新人才基金
关键词
花芽分化
桂花
育性
flower bud differentiation, Osmanthus fragrans Lour., reproducibility
