Floral ontogeny of Pedicularis (Orobanchaceae), with an emphasis on the corolla upper lip
Yu, Wen-Bin1,2; Cai, Jie3; Li, De-Zhu1,3; Mill, Robert R.4; Wang, Hong1
2013-07-01
发表期刊JOURNAL OF SYSTEMATICS AND EVOLUTION
ISSN1674-4918
卷号51期号:4页码:435-450
摘要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.
关键词Corolla Upper Lip Development Of Monosymmetry Floral Diversity Floral Evolution Galea Orobanchaceae Pedicularis Rostrum (Beak) Scrophulariaceae
资助信息National Natural Science Foundation of China [30970201, 30570115, 31200185]; National Basic Research Program of China (973 Program) [2007CB411600]; West Light Foundation of the Chinese Academy of Sciences; Scottish Government's Rural and Environment Science and Analytical Services Division
收录类别SCI
语种英语
引用统计
文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/16803
专题中国科学院东亚植物多样性与生物地理学重点实验室
作者单位1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming 650201, Peoples R China
2.Field Museum Nat Hist, Dept Bot, Chicago, IL 60605 USA
3.Chinese Acad Sci, Kunming Inst Bot, Plant Germplasm & Genom Ctr, Kunming 650201, Peoples R China
4.Royal Bot Gardens, Edinburgh EH3 5LR, Midlothian, Scotland
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Yu, Wen-Bin,Cai, Jie,Li, De-Zhu,et al. Floral ontogeny of Pedicularis (Orobanchaceae), with an emphasis on the corolla upper lip[J]. JOURNAL OF SYSTEMATICS AND EVOLUTION,2013,51(4):435-450.
APA Yu, Wen-Bin,Cai, Jie,Li, De-Zhu,Mill, Robert R.,&Wang, Hong.(2013).Floral ontogeny of Pedicularis (Orobanchaceae), with an emphasis on the corolla upper lip.JOURNAL OF SYSTEMATICS AND EVOLUTION,51(4),435-450.
MLA Yu, Wen-Bin,et al."Floral ontogeny of Pedicularis (Orobanchaceae), with an emphasis on the corolla upper lip".JOURNAL OF SYSTEMATICS AND EVOLUTION 51.4(2013):435-450.
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