The mechanism of pollinator specificity between two sympatric fig varieties: a combination of olfactory signals and contact cues
文献类型:期刊论文
作者 | Jin Chen*![]() |
刊名 | Annals of Botany
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出版日期 | 2013 |
卷号 | 111期号:2页码:173-181 |
关键词 | Contact cues Ficus semicordata floral scents host recognition hybridization pollination pollinator specificity reproductive isolation |
中文摘要 | Background and Aims Pollinator specificity facilitates reproductive isolation among plants, and mechanisms that generate specificity influence species boundaries. Long-range volatile attractants, in combination with morphological co-adaptations, are generally regarded as being responsible for maintaining extreme host specificity among the fig wasps that pollinate fig trees, but increasing evidence for breakdowns in specificity is accumulating. The basis of host specificity was examined among two host-specific Ceratosolen fig wasps that pollinate two sympatric varieties of Ficus semicordata, together with the consequences for the plants when pollinators entered the alternative host variety. Methods The compositions of floral scents from receptive figs of the two varieties and responses of their pollinators to these volatiles were compared. The behaviour of the wasps once on the surface of the figs was also recorded, together with the reproductive success of figs entered by the two Ceratosolen species. Key Results The receptive-phase floral scents of the two varieties had different chemical compositions, but only one Ceratosolen species displayed a preference between them in Y-tube trials. Specificity was reinforced at a later stage, once pollinators were walking on the figs, because both species preferred to enter figs of their normal hosts. Both pollinators could enter figs of both varieties and pollinate them, but figs with extra-varietal pollen were more likely to abort and contained fewer seeds. Hybrid seeds germinated at normal rates. Conclusions Contact cues on the surface of figs have been largely ignored in previous studies of fig wasp host preferences, but together with floral scents they maintain host specificity among the pollinators of sympatric F. semicordata varieties. When pollinators enter atypical hosts, post-zygotic factors reduce but do not prevent the production of hybrid offspring, suggesting there may be gene flow between these varieties. |
公开日期 | 2012-12-17 |
源URL | [http://ir.xtbg.org.cn/handle/353005/3816] ![]() |
专题 | 西双版纳热带植物园_动植物关系组 |
通讯作者 | Jin Chen* |
推荐引用方式 GB/T 7714 | Jin Chen*. The mechanism of pollinator specificity between two sympatric fig varieties: a combination of olfactory signals and contact cues[J]. Annals of Botany,2013,111(2):173-181. |
APA | Jin Chen*.(2013).The mechanism of pollinator specificity between two sympatric fig varieties: a combination of olfactory signals and contact cues.Annals of Botany,111(2),173-181. |
MLA | Jin Chen*."The mechanism of pollinator specificity between two sympatric fig varieties: a combination of olfactory signals and contact cues".Annals of Botany 111.2(2013):173-181. |
入库方式: OAI收割
来源:西双版纳热带植物园
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