Reproductive isolation of two sympatric louseworts, Pedicularis rhinanthoides and Pedicularis longiflora (Orobanchaceae): how does the same pollinator type avoid interspecific pollen transfer?

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	Reproductive isolation of two sympatric louseworts, Pedicularis rhinanthoides and Pedicularis longiflora (Orobanchaceae): how does the same pollinator type avoid interspecific pollen transfer?
	Yang, Chun-Feng ; Gituru, Robert W. ; Guo, You-Hao
刊名	BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
	2007
卷号	90 期号:1 页码:37-48
关键词	SEED-SET ETHOLOGICAL ISOLATION FLORAL MORPHOLOGY MOUNT-RAINIER SCROPHULARIACEAE ECOLOGY BUMBLEBEES HYBRIDIZATION POPULATION ADAPTATION
ISSN号	0024-4066
中文摘要	To study the isolation mechanism of two commonly intermingled louseworts, Pedicularis rhinanthoides and Pedicularis longiflora, pollination biology in three mixed populations with the two species was investigated during a 3-year project. The results indicated that higher flowering density could help to enhance pollinator activity, and thus increase reproductive output. Bumblebees are the exclusive pollinator for the two louseworts and are essential for their reproductive success. Reproductive isolation between the two species is achieved by a combination of pre- and postzygotic isolation mechanisms. Although both species are pollinated by bumblebees, the present study indicates they successfully avoid interspecific pollen transfer due to floral isolation. Mechanical isolation is achieved by the stigma in the two species picking up pollen from different parts of the pollinator's body, whereas ethological isolation occurs due to flower constancy. Additionally, strong postzygotic isolation was demonstrated by non seed set after artificial cross-pollination even with successful pollen tube growth. We describe the hitherto unreported role of variation in the tightness and direction of the twist of the corolla beak in maintaining mechanical isolation between Pedicularis species. Although floral isolation in Pedicularis is incomplete, it is considered to be an important mechanism in maintaining species boundaries in the genus. (c) 2007 The Linnean Society of London, Biological Journal of the Linnean Society.
收录类别	SCI
原文出处	10.1111/j.1095-8312.2007.00709.x
语种	英语
公开日期	2016-05-12
内容类型	期刊论文
源URL	[http://ir.xtbg.org.cn/handle/353005/9838]
专题	西双版纳热带植物园_文献共享
推荐引用方式 GB/T 7714	Yang, Chun-Feng,Gituru, Robert W.,Guo, You-Hao. Reproductive isolation of two sympatric louseworts, Pedicularis rhinanthoides and Pedicularis longiflora (Orobanchaceae): how does the same pollinator type avoid interspecific pollen transfer?[J]. BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY,2007,90(1):37-48.
APA	Yang, Chun-Feng,Gituru, Robert W.,&Guo, You-Hao.(2007).Reproductive isolation of two sympatric louseworts, Pedicularis rhinanthoides and Pedicularis longiflora (Orobanchaceae): how does the same pollinator type avoid interspecific pollen transfer?.BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY,90(1),37-48.
MLA	Yang, Chun-Feng,et al."Reproductive isolation of two sympatric louseworts, Pedicularis rhinanthoides and Pedicularis longiflora (Orobanchaceae): how does the same pollinator type avoid interspecific pollen transfer?".BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY 90.1(2007):37-48.