Parallel evolution of angiosperm colour signals: common evolutionary pressures linked to hymenopteran vision
Parallel evolution of angiosperm colour signals: common evolutionary pressures linked to hymenopteran vision
复制标题
DOI：
10.1098/rspb.2012.0827
复制
发表时间：
2012-09-07
影响因子：
4.7
通讯作者：
Wong, Bob B. M.
中科院分区：
文献类型：
--
作者：
Dyer, Adrian G.;Boyd-Gerny, Skye;Wong, Bob B. M.
澳大利亚的开花植物在地理上被隔离了3400万多年。在北半球，先前的研究揭示了膜翅目传粉者的最佳辨别能力与进化最频繁的花色之间的紧密契合。我们收集了111种澳大利亚本土花卉的光谱数据，并考虑到潜在的重要传粉者的颜色识别能力来测试信号外观。花朵反射率曲线的最高频率与北半球报告的数据一致。随后将澳大利亚花卉的反射率映射到蜜蜂颜色空间，揭示了花卉颜色演变的分布与北半球非常相似。因此，澳大利亚的开花植物可能具有独立进化的光谱信号，最大限度地利用膜翅目的颜色辨别。此外，我们还发现，特定被子植物花朵颜色的变异程度与反射颜色的范围相匹配，而反射颜色只能由经历过差异条件反射的蜜蜂来区分。这一观察表明，传粉者神经系统的可塑性要求允许相同物种的花的泛化，同时克服可能存在的非奖励花的模仿。
Flowering plants in Australia have been geographically isolated for more than 34 million years. In the Northern Hemisphere, previous work has revealed a close fit between the optimal discrimination capabilities of hymenopteran pollinators and the flower colours that have most frequently evolved. We collected spectral data from 111 Australian native flowers and tested signal appearance considering the colour discrimination capabilities of potentially important pollinators. The highest frequency of flower reflectance curves is consistent with data reported for the Northern Hemisphere. The subsequent mapping of Australian flower reflectances into a bee colour space reveals a very similar distribution of flower colour evolution to the Northern Hemisphere. Thus, flowering plants in Australia are likely to have independently evolved spectral signals that maximize colour discrimination by hymenoptera. Moreover, we found that the degree of variability in flower coloration for particular angiosperm species matched the range of reflectance colours that can only be discriminated by bees that have experienced differential conditioning. This observation suggests a requirement for plasticity in the nervous systems of pollinators to allow generalization of flowers of the same species while overcoming the possible presence of non-rewarding flower mimics.