Wang Hao, Cao Guo-Xing, Wang Lin-Lin, Yang Yong-Ping, Zhang Zhi-Qiang, Duan Yuan-Wen
Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of Botany Chinese Academy of Sciences Kunming China.
Department of Forestry Sichuan Agricultural University Chengdu China.
Ecol Evol. 2017 Sep 5;7(20):8156-8160. doi: 10.1002/ece3.3391. eCollection 2017 Oct.
Examining variations in pollinator effectiveness can enhance our understanding of how pollinators and plants interact. Pollen deposition and seed production after a single visit by a pollinator are often used to estimate pollinator effectiveness. However, seed production is not always directly related to pollen deposition because not all pollen grains that are deposited on a stigma are compatible or conspecific. In the field, we tested pollinator effectiveness based on pollen deposition and the resulting seed production after single visits by different pollinator groups in a gynodieocious alpine plant (). Our results showed that mean pollen deposition was generally inconsistent with mean seed production when comparisons were performed among different pollinator groups and sexes. In general, the correlations were not significant between pollen deposition and seed production in both perfect and female flowers after single visits by halictid bees, bumble bees, and hoverflies. We suggest seed set of virgin flowers after single visits is a more reliable indicator of pollinator effectiveness than pollen deposition and would be a better indicator of pollinator effectiveness for future studies.
研究传粉者有效性的差异可以增进我们对传粉者与植物如何相互作用的理解。传粉者单次访花后的花粉沉积和种子产量常被用于估计传粉者的有效性。然而，种子产量并不总是与花粉沉积直接相关，因为并非所有落在柱头上的花粉粒都是可育的或同种的。在野外，我们在一种雌雄异株的高山植物中，基于不同传粉者群体单次访花后的花粉沉积和由此产生的种子产量，测试了传粉者的有效性。我们的结果表明，当在不同传粉者群体和性别之间进行比较时，平均花粉沉积通常与平均种子产量不一致。一般来说，隧蜂、熊蜂和食蚜蝇单次访花后，两性花和雌花中的花粉沉积与种子产量之间的相关性均不显著。我们认为，单次访花后未授粉花的结实率是比花粉沉积更可靠的传粉者有效性指标，并且对于未来的研究而言，它将是传粉者有效性的更好指标。
