摘要:
本观察是从植物形态学的角度,应用整体解剖法和扫描电镜进行研究,目的在于了解龙眼花序和花朵从孕育到成熟的动态变化规律,为今后研究龙眼花芽分化和花性分异提供基础。观察结果:龙眼为聚伞花序圆锥形排列的混合花序,花各部分的分化次序保持着向心性,即花萼最先,依次为花瓣、雄蕊及雌蕊。同时对龙眼小花序上三歧花组中,中间一朵花最先开放;花萼原基成2-2-1方式先后发生等,提供解剖学依据。
Abstract:
The inflorescence development and the sequence of flower differentiation of longan (Dimocarpus Longana Lour.) were observed through anatomical and SEM investigation, the aim of which is to find out the regular pattern of dynamic change of the flower buds from initiation to maturity.It will help to further study the flower bud differentiation and the differentiation of the flower sexual type of longan.The results are as follows:The clusters of the inflorescence of longan plant were found to be fasiculus, or paniculatus, which consisted of many cymes. They were mixed with leaves.The sequence of the development of different flower parts was centri petal; the sepals occurred first, followed by the petals, stamens and pistils, appearing from periphery to centre.That was somewhat different from previous research.Each small group of cymes had three flowers andthe central one opened first.The initial sepal was 2-2-1 in pattern.Its morphological mechanisms of the differentiation and development were also discussed.Some of the basic material applied here will be bene ficial for later researches in this field.
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