Patterns of floral development in Agalinis and allies (Scrophulariaceae). I. Floral development of Agalinis fasciculata and A. tenuifolia
Patterns of floral development in Agalinis and allies (Scrophulariaceae). I. Floral development of Agalinis fasciculata and A. tenuifolia
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DOI：
10.1139/b87-307
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发表时间：
1987-11
期刊：
影响因子：
1.1
通讯作者：
C. M. Kampny;Judith M. Canne-Hilliker
中科院分区：
文献类型：
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作者：
C. M. Kampny;Judith M. Canne-Hilliker
细叶阿加利斯和细叶阿加利斯花发育早期的事件顺序和结构形态相似。束状。花萼原基的起始顺序是先由侧后萼原基起始，后由中后萼原基起始，最后由两个前萼原基起始。花冠原基的发生顺序为先到后，然后四个雄蕊原基同时发生。后来雌蕊群起源为椭圆形的脊。其中两个凹陷形成了小室，分开它们的裂开的脊的两侧相遇并形成了隔膜。原始时期，花萼、花冠和雄蕊群中均存在明显的对称现象。花萼内器官发生迅速，萼叶和萼筒先于花其他部分器官发生。除花萼外，各种花部特征状态在花发育后期表现出明显差异。
The sequence of events and morphology of structures were similar during early floral development of Agalinis tenuifolia and A. fasciculata. The lateral-posterior calyx primordia were initiated first, followed by the middle-posterior primordium, and lastly by the two anterior primordia. The corolla primordia arose in an anterior to posterior succession, then the four stamen primordia were initiated simultaneously. Later the gynoecium originated as an oval-shaped ridge. Two depressions within it became locules, and the two sides of the cleaved ridge separating them met and formed a septum. A placenta formed in each locule and numerous ovules were initiated on it. Zygomorphy was apparent in the calyx, corolla, and androecium during the primordial stage. Organogenesis in the calyx was rapid so that the calyx lobes and tube were well formed before organogenesis of other floral parts. Except for those of the calyx, floral character states distinctive for each species were manifested late in development of the f...