Arid
DOI10.1007/s00606-011-0485-4
Pollination biology of Oreocereus celsianus (Cactaceae), a columnar cactus inhabiting the high subtropical Andes
Larrea-Alcazar, Daniel M.1; Lopez, Ramiro P.1,2
通讯作者Larrea-Alcazar, Daniel M.
来源期刊PLANT SYSTEMATICS AND EVOLUTION
ISSN0378-2697
EISSN2199-6881
出版年2011
卷号295期号:1-4页码:129-137
英文摘要

The geographical dichotomy hypothesis suggests that columnar cacti in the tropics depend primarily on bats for pollination. This dependence may to be less in the outer tropics where many columnar cactus species (or their populations) show a relatively generalized pollination system with both nocturnal (moths and bats) and diurnal pollinators (bees and hummingbirds) (geographical dichotomy hypothesis). This hypothesis has been mostly tested in the northern tropics; nonetheless, our knowledge of columnar cactus species inhabiting the southern tropics is still scarce. The aim of this project was to evaluate the pollination biology of Oreocereus celsianus, a columnar cactus with restricted distribution in the subtropical Andes, to determine if the pollination system of this cactus tends to be more generalized than specialized because of the geographical position where it occurs. Observations of frequency of visit showed that Patagona gigas (Giant Hummingbird) is the main pollinator of the flowers, visiting them when they are opening (afternoon of the first day). Bees, wasps and moths were occasional visitors of the flowers. None of them seem to act as pollinator. Autogamy, geitonogamy and xenogamy treatments produced high fruit set, showing that O. celsianus has an unusual mixed mating system. The results suggest that this Andean columnar cactus is partially specialized on hummingbirds, with most pollination service performed by a single species, and it has the capacity of selfing (’fail-safe’ pollination system). This mixed mating system (both outcrossing and selfing) may be a response to the unpredictable environment of the Prepuna in the subtropical Andes.


英文关键词Andes Hummingbirds Nectar robbing Semi-deserts Self-compatible system Southern tropics
类型Article
语种英语
国家Bolivia ; Chile
收录类别SCI-E
WOS记录号WOS:000293026600010
WOS关键词NECTAR-FEEDING BATS ; HUMMINGBIRD POLLINATION ; REPRODUCTIVE-BIOLOGY ; TEHUACAN VALLEY ; EVOLUTION ; FOREST ; SYSTEM
WOS类目Plant Sciences ; Evolutionary Biology
WOS研究方向Plant Sciences ; Evolutionary Biology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/170055
作者单位1.UMSA, Inst Ecol, Herbario Nacl Bolivia, La Paz, Bolivia;
2.Univ La Serena, Dept Biol, Lab Ecofisiol Vegetal, La Serena, Chile
推荐引用方式
GB/T 7714
Larrea-Alcazar, Daniel M.,Lopez, Ramiro P.. Pollination biology of Oreocereus celsianus (Cactaceae), a columnar cactus inhabiting the high subtropical Andes[J],2011,295(1-4):129-137.
APA Larrea-Alcazar, Daniel M.,&Lopez, Ramiro P..(2011).Pollination biology of Oreocereus celsianus (Cactaceae), a columnar cactus inhabiting the high subtropical Andes.PLANT SYSTEMATICS AND EVOLUTION,295(1-4),129-137.
MLA Larrea-Alcazar, Daniel M.,et al."Pollination biology of Oreocereus celsianus (Cactaceae), a columnar cactus inhabiting the high subtropical Andes".PLANT SYSTEMATICS AND EVOLUTION 295.1-4(2011):129-137.
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