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The reproductive strategy of a pollinator-limited Himalayan plant, Incarvillea mairei(Bignoniaceae)
Ai,Honglian1; Zhou,Wei1,2; Xu,Kun3; Wang,Hong1; Li,Dezhu1,2
2013-12-01
发表期刊BMC Plant Biology
ISSN1471-2229
卷号13期号:1
摘要AbstractBackgroundPlants may adapt to alpine habitats by specialization in the reproductive strategy and functional aspects of their flowers and pollination systems. Alpine habitats reduce the opportunities for cross-pollination in a relatively high proportion of alpine plant species, and self-pollination may be favored in these adverse conditions. Here, we investigated the mating system and pollination of Incarvillea mairei, a perennial Himalayan herb typically found at altitudes between 3000 and 4500?m.ResultsAnalyses of floral morphology, observation of plant-pollinator interactions, and hand pollination experiments were conducted in three natural populations. Outcrossing rates and effective numbers of pollen donors were assessed in 45 open-pollinated families by using progeny analysis based on seven microsatellite markers. Incarvillea mairei displayed a set of apparently specialized floral traits, the stigma is sensitive to touch and close immediately and its reopening allows a second opportunity for the receipt of pollen. The species is fully self-compatible but employs a predominantly outcrossing mating system according to parentage analysis (tm?>?0.9). Fruit set was low (26.3%), whereas seed set was high (67.2%), indicating that this species suffers pollinator limitation. Its main effective pollinator was Halictus sp., and visitation frequency was low.ConclusionsFloral features such as having a sensitive stigma and anther-prongs, in conjunction with pollinator behavior, function together contributing to a set of unique reproductive adaptations that enhance outcrossing success. The increased floral longevity and high pollination efficiency operated as compensatory mechanisms to counteract low pollinator visitation frequency.
关键词Himalaya-Hengduan mountains region Incarvillea mairei Plant-pollinator interaction Pollinator limitation Sensitive stigma
语种英语
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文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/61764
专题中国科学院昆明植物研究所
通讯作者Wang,Hong; Li,Dezhu
作者单位1.Chinese Academy of Sciences; Key Laboratory for Plant Biodiversity and Biogeography of East Asia, Kunming Institute of Botany
2.Kunming Institute of Botany, Chinese Academy of Sciences; Plant Germplasm and Genomics Center, Germplasm Bank of Wild Species
3.Kunming Institute of Botany, Chinese Academy of Sciences; Lijiang Alpine Botanic Garden
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Ai,Honglian,Zhou,Wei,Xu,Kun,et al. The reproductive strategy of a pollinator-limited Himalayan plant, Incarvillea mairei(Bignoniaceae)[J]. BMC Plant Biology,2013,13(1).
APA Ai,Honglian,Zhou,Wei,Xu,Kun,Wang,Hong,&Li,Dezhu.(2013).The reproductive strategy of a pollinator-limited Himalayan plant, Incarvillea mairei(Bignoniaceae).BMC Plant Biology,13(1).
MLA Ai,Honglian,et al."The reproductive strategy of a pollinator-limited Himalayan plant, Incarvillea mairei(Bignoniaceae)".BMC Plant Biology 13.1(2013).
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