POLLINATION AND MATING SYSTEMS OF APODANTHACEAE AND THE DISTRIBUTION OF REPRODUCTIVE TRAITS IN PARASITIC ANGIOSPERMS
POLLINATION AND MATING SYSTEMS OF APODANTHACEAE AND THE DISTRIBUTION OF REPRODUCTIVE TRAITS IN PARASITIC ANGIOSPERMS
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DOI：
10.3732/ajb.1200627
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发表时间：
2013-06-01
影响因子：
3
通讯作者：
Renner, Susanne S.
中科院分区：
文献类型：
--
作者：
Bellot, Sidonie;Renner, Susanne S.
本研究的目的：17年前发表的关于寄生被子植物生殖生物学和性系统的最新综述报道了寄生性被子植物可能与寄生有关。我们利用目前的知识寄生谱系和他们的姐妹群，和数据的生殖生物学和性系统的Apodanthaceae，readdress的问题可能的趋势在生殖生物学的寄生angiosperms.Methods：在津巴布韦和伊朗的实地考察产生的传粉者和性形态频率在两种Apodanthaceae的数据。传粉者，传播者，和寄生虫及其姐妹群体的性系统的数据汇编从literature.Key results：与一些Viscaceae的可能例外，大多数的ca。4500寄生被子植物是动物授粉的，和约。10%的寄生虫是雌雄异株的，但被子植物中雌雄异株的获得和损失知之甚少，无法推断统计相关性。研究Apodanthaceae是雌雄异株和授粉花蜜或花粉觅食丽蝇科和其他fly.Conclusions：姐妹组比较到目前为止没有发现任何生殖特征的进化（或丢失）伴随着寄生的生活方式，但缺乏风授粉表明，这种花粉载体可能是适应不良的寄生虫，也许是因为主机叶或花承担接近地面。
Premise of the study: The most recent reviews of the reproductive biology and sexual systems of parasitic angiosperms were published 17 yr ago and reported that dioecy might be associated with parasitism. We use current knowledge on parasitic lineages and their sister groups, and data on the reproductive biology and sexual systems of Apodanthaceae, to readdress the question of possible trends in the reproductive biology of parasitic angiosperms.Methods: Fieldwork in Zimbabwe and Iran produced data on the pollinators and sexual morph frequencies in two species of Apodanthaceae. Data on pollinators, dispersers, and sexual systems in parasites and their sister groups were compiled from the literature.Key results: With the possible exception of some Viscaceae, most of the ca. 4500 parasitic angiosperms are animal-pollinated, and ca. 10% of parasites are dioecious, but the gain and loss of dioecy across angiosperms is too poorly known to infer a statistical correlation. The studied Apodanthaceae are dioecious and pollinated by nectar- or pollen-foraging Calliphoridae and other flies.Conclusions: Sister group comparisons so far do not reveal any reproductive traits that evolved (or were lost) concomitant with a parasitic life style, but the lack of wind pollination suggests that this pollen vector may be maladaptive in parasites, perhaps because of host foliage or flowers borne close to the ground.