Fly pollination and duodichogamy in Bridelia stipularis and Cleistanthus sumatranus (Phyllanthaceae)
Fly pollination and duodichogamy in Bridelia stipularis and Cleistanthus sumatranus (Phyllanthaceae)
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DOI：
10.1111/1442-1984.12035
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发表时间：
2014-09
影响因子：
1.4
通讯作者：
Yongquan Li;Shi-Xiao Luo;Dianxiang Zhang
中科院分区：
文献类型：
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作者：
Yongquan Li;Shi-Xiao Luo;Dianxiang Zhang
叶下珠草科植物全球分布，共有1745种，均为单性花，大部分分布在热带地区。少数几种已经研究过授粉系统的物种是由苍蝇、黄蜂或专化蛾授粉的，至少有两种是双性婚配的。本文报道了在热带海南岛研究的中国植物百里香和野桑树的开花物候和授粉情况。这两个物种都是双性婚配，并被指示为苍蝇授粉。大头金蝇、大头金小蜂、大头金龟子、大头金小蜂等是访花次数最多的种类，其中一些种类与食草动物(是华中最多的访客。苏门答腊花。人工授粉的花朵座果率高于自由授粉的花朵，但由于果实自然败育，这一差异并不显著，说明苍蝇传粉者并不限制叶下珠科植物的繁殖。这项研究是对亚洲关于苍蝇授粉的有限文献的补充，也是对更有限的关于二倍体配子的文献的补充。这有助于在未来的研究中为分析双性配子的进化拓宽我们的理解，但这种罕见的有性系统进化背后的具体生态因素仍然很难概括。
The globally distributed family Phyllanthaceae comprises 1745 species, all of which produce unisexual flowers, and most of the species occur in the tropics. The few species in which the pollination system has been studied are pollinated by flies, wasps, or specialized moths, and at least two species are duodichogamous. Here we report on the flowering phenology and pollination of the Chinese species Bridelia stipularis and Cleistanthus sumatranus, which were studied on the tropical Hainan Island. Both species are duodichogamous and indicated to be fly-pollinated. The calliphorid species Chrysomya megacephala, Isomyia isomyia, Pierretia sp., Hemipyrellia sp., and Achoetandrus tufifacies were the most frequent flower visitors to B. stipularis; some of these species together with syrphids (Meliscaeva cinctella, Dideopsis sp., and Eristalis sp.) were the most abundant visitors to Cl. sumatranus flowers. Fruit set in hand-pollinated flowers was higher than in open-pollinated flowers, but because of natural fruit abortion the difference was not significant, indicating that fly pollinators do not limit reproduction of these Phyllanthaceae species. This study provides an addition to the limited Asian literature on pollination by flies and the even more limited literature on duodichogamy. It could help to broaden our understanding for analysis of the evolution of duodichogamy in future research, but the specific ecological factors behind the evolution of this rare sexual system are still difficult to generalize.