Floral ontogeny of Pedicularis (Orobanchaceae), with an emphasis on the corolla upper lip
Floral ontogeny of Pedicularis (Orobanchaceae), with an emphasis on the corolla upper lip
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马先蒿（列当科）的花个体发育，重点是花冠上唇
DOI：
10.1111/jse.12018
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发表时间：
2013-07
影响因子：
3.7
通讯作者：
Wang, Hong
中科院分区：
文献类型：
--
作者：
Cai, Jie;Li, De-Zhu;Mill, Robert R.;Wang, Hong
马先蒿属植物花冠形态具有高度的多样性，但其花发育的研究却很少。特别是，高度可变的上唇（盔瓣）的发展，其中三个广泛的形态类型（无喙和无齿，无喙和齿，喙）可以区分，仍然未知。我们利用扫描电子显微镜研究了两种喙型植物，P. siphonantha和P. gruina的花发育的早期阶段。为了比较三种盔瓣类型的发育过程，每种类型的三个物种进行了调查。马先蒿属植物花器官的起源是一致的。萼片的起始是从侧-正轴原基开始的，然后是侧-远轴原基（有时缺失），然后是中-正轴原基（有时也缺失）。雄蕊先于花瓣发生，或花瓣原基的发育可能比雄蕊原基的发育滞后。四个雄蕊原基同时发生。五个花瓣原基几乎同时启动。三种盔瓣类型上唇的发育过程在两瓣细胞的扩张速度和方向上存在差异，这些差异决定了上唇是否形成喙和/或牙齿。马先蒿属植物的花发育与Agalinis的花发育相似，支持马先蒿属植物的分子分类。马先蒿属植物的花部单对称性在萼片起始时就已建立，并一直维持到开花。上唇的发育为马先蒿属喙状和/或齿状盔状花序的进化提供了一些线索。
Pedicularis shows high diversity in its corolla form, however, its floral ontogeny has been rarely investigated. In particular, the development of the highly variable upper lip (galea), three broad morphological types of which (beakless and toothless, beakless and toothed, beaked) can be discriminated, remains unknown. We used scanning electron microscopy to investigate the early stages of floral ontogeny in two beaked species, Pedicularis gruina and P. siphonantha. To compare the developmental processes of the three galea types, three species for each type were investigated. Initiations of floral organs in Pedicularis are consistent. Sepal initiations are successive from the lateral‐adaxial primordia, followed by the lateral‐abaxial ones (these sometimes missing), then the mid‐adaxial one (again sometimes missing). The stamens are initiated prior to the petals, or development of petal primordia may be retarded at the early stages in comparison with that of stamen primordia. Four stamen primordia are initiated simultaneously. The five petal primordia are initiated almost simultaneously. Development processes of the upper lip among the three galea types differ in the expansion rates and directions of the cells of the two lobes and these differences govern whether or not a beak and/or teeth are formed on the upper lip. The floral ontogeny of Pedicularis is close to that of Agalinis, which supports the molecular assignment. Floral monosymmetry of Pedicularis is established at the beginning of sepal initiation and is maintained until flowering. The development of the upper lip provides some clues to the evolution of beaked and/or toothed galeas in Pedicularis.
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影响因子：
1.9
作者：
S.-G. Sun;Y.-H. Guo;R. Gituru;S.-Q. Huang
通讯作者：
S.-G. Sun;Y.-H. Guo;R. Gituru;S.-Q. Huang
DOI：
--
发表时间：
1994
期刊：
--
影响因子：
--
作者：
V. Grant
通讯作者：
V. Grant
影响因子：
1.9
作者：
Paul H. Williams;Ya Tang;Jianwu Yao;S. Cameron
通讯作者：
Paul H. Williams;Ya Tang;Jianwu Yao;S. Cameron
影响因子：
1.1
作者：
C. M. Kampny;Judith M. Canne-Hilliker
通讯作者：
C. M. Kampny;Judith M. Canne-Hilliker
影响因子：
1.9
作者：
W. Hong;Dz Z. Li
通讯作者：
W. Hong;Dz Z. Li