Delayed Selfing in an Alpine Biennial Gentianopsispaludosa (Gentianaceae) in the Qinghai-TibetanPlateau

NWIPB OpenIR

	Delayed Selfing in an Alpine Biennial Gentianopsispaludosa (Gentianaceae) in the Qinghai-TibetanPlateau
	Duan Yuan-Wen ; Amots Dafni ; Hou Qin-Zheng ; He Ya-Ping ; Liu Jian-Quan
	2010
发表期刊	Journal of Integrative Plant Biology ; Duan Yuan-Wen.Delayed Selfing in an Alpine Biennial Gentianopsispaludosa (Gentianaceae) in the Qinghai-TibetanPlateau.Journal of Integrative Plant Biology,2010,52(6):593–599
摘要	Delayed selfing could provide ovules with an opportunity to befertilized as a means of “pollinationassurance” before the flowers wilt. It could, thus, be regarded as an adaptation to unpredictable pollinatorenvironments. Within the alpine biennial Gentianopsis paludosa, the showy flowers and herkogamy atthe early stage of a flower’s life cycle may favor outcrossing. As the flower ages, anthers contact thecentral stigma due to theelongation of all filaments, resulting in autonomous selfing. Flower visitorsare extremely rare in a high altitude population; and examination of the mating system indicates thatG. paludosa is self-pollinated under natural conditions in this population. While at the lower altitude, thebumblebee visitation rate is relatively high but possibly unreliable. Stigma receptivity is the highest onthe third day of anthesis, and decreases thereafter. Pollen viability is the highest when flowers open, andgradually decreases later. Self-pollination of G. paludosa occurs at the late stage of a flower’s lifecyclewhen stigma receptivity and pollen viability have both decreased, suggesting delayed selfing andassurance of seed production. This delayed selfing could assure seed production under the constraintsof pollinator scarcity, but ensure outcrossing when pollinators were available. Such a flexible pollination mechanism is highly adaptive in the alpine environment of theQinghai-Tibetan Plateau.
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/20421
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Duan Yuan-Wen,Amots Dafni,Hou Qin-Zheng,et al. Delayed Selfing in an Alpine Biennial Gentianopsispaludosa (Gentianaceae) in the Qinghai-TibetanPlateau[J]. Journal of Integrative Plant Biology, Duan Yuan-Wen.Delayed Selfing in an Alpine Biennial Gentianopsispaludosa (Gentianaceae) in the Qinghai-TibetanPlateau.Journal of Integrative Plant Biology,2010,52(6):593–599,2010.
APA	Duan Yuan-Wen,Amots Dafni,Hou Qin-Zheng,He Ya-Ping,&Liu Jian-Quan.(2010).Delayed Selfing in an Alpine Biennial Gentianopsispaludosa (Gentianaceae) in the Qinghai-TibetanPlateau.Journal of Integrative Plant Biology.
MLA	Duan Yuan-Wen,et al."Delayed Selfing in an Alpine Biennial Gentianopsispaludosa (Gentianaceae) in the Qinghai-TibetanPlateau".Journal of Integrative Plant Biology (2010).