First record of potential bird pollination in the holoparasitic genus <i>Orobanche</i> L.
First record of potential bird pollination in the holoparasitic genus <i>Orobanche</i> L.
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全寄生列当属潜在鸟类授粉的首次记录。
DOI：
10.1111/1442-1984.12389
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发表时间：
2022
影响因子：
1.4
通讯作者：
Takayama Koji
中科院分区：
文献类型：
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作者：
Nishimura Akihiro;Takayama Koji
传粉媒介在动物性植物的繁殖中发挥着重要作用。人们经常观察到海洋岛屿植物传粉媒介的变化，这可能是由于动物群的差异。在这项研究中，我们获得了列当科（列当科）传粉媒介从昆虫到鸟类的转变数据，列当科是太平洋海洋岛屿小笠原群岛特有的全寄生植物物种。我们观察授粉并测量种子活力。 Boninsimae 及其大陆姊妹种 O.蓝藻。我们发现两种雀形目鸟类，即日本绣眼鸟（Zosterops japonicus）和鹎（Hypsipetes amaurotis squameiceps）会造访花朵并吸食O的花蜜。 boninsimae，而只有昆虫访问 O 的那些。蓝藻。在两个列当品种中，在排除传粉媒介的处理下产生了有活力的种子，表明这些种子是通过自动自花授粉和/或无融合生殖产生的。这些结果表明O. boninsima 可能由鸟类授粉，并可以通过自动自花授粉/无融合生殖产生种子。这是列当鸟属鸟类的首次造访记录。与其他海洋岛屿相比，对小笠原群岛本土植物授粉系统的研究很少。 boninsimaemae 可能提供了小笠原群岛授粉媒介转变的一个有价值的例子。
Pollinators play an important role in the reproduction of zoophilous plants. A shift in pollinators has often been observed for oceanic island plants, probably because of the differences in fauna. In this study, we obtained data on pollinator shifts from insects to birds inOrobanche boninsimae(Orobanchaceae), a holoparasitic plant species endemic to the Bonin (Ogasawara) Islands, oceanic islands in the Pacific. We observed pollination and measured seed viability inO. boninsimaeand its continental sister speciesO. coerulescens. We found that two passerine birds, the Japanese white‐eye (Zosterops japonicus) and bulbul (Hypsipetes amaurotis squameiceps), visited the flowers and sucked the nectar ofO. boninsimae, while only insects visited those ofO. coerulescens. Viable seeds were produced under pollinator‐excluded treatments in the twoOrobanchespecies, indicating that the seeds were produced by automatic self‐pollination and/or apomixis. These results suggest thatO. boninsimaemay be pollinated by birds and can produce seeds by automatic self‐pollination/apomixis. This is the first record of visitation of the genusOrobancheby birds. Studies of pollination systems in native plants on the Bonin Islands are few compared to those on other oceanic islands, andO. boninsimaemay provide a valuable example of pollinator shifts in the Bonin Islands.