Lens transmittance shapes ultraviolet sensitivity in the eyes of frogs from diverse ecological and phylogenetic backgrounds
Lens transmittance shapes ultraviolet sensitivity in the eyes of frogs from diverse ecological and phylogenetic backgrounds
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晶状体透射率影响来自不同生态和系统发育背景的青蛙眼睛的紫外线敏感性
DOI：
10.1098/rspb.2019.2253
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Taran Grant
中科院分区：
文献类型：
--
作者：
C. Yovanovich;M. Pierotti;A. Kelber;Gabriel Jorgewich;R. Ibáñez;Taran Grant
到达视网膜的短波长（紫外线（UV）、紫色和蓝色）光的量取决于眼介质（特别是透镜）的透射特性，并且在先前研究的所有脊椎动物组中在物种之间变化很大。对32种不同生境、地理分布和系统发育位置的无尾两栖类动物的透镜透射率进行了测量，并结合眼睛大小和瞳孔形状，分析了其与昼夜活动模式、海拔和纬度的关系。我们发现一个异常高的透镜紫外线透射率在最基础的物种，和截止范围，延伸到可见光谱的其余部分的样品，与透镜甚至吸收紫光在一些昼夜物种。然而，其他白天活动的青蛙也有像夜间活动的青蛙一样传输紫外线的晶状体。这种不清楚的模式，在隔离的眼介质透射率和昼夜活动是共享与其他脊椎动物，是一致的，在我们的统计分析中没有显着的相关性。虽然我们没有发现一个显着的系统发育的影响，密切相关的物种往往有相似的透射率，无论他们是否共享相同的昼夜模式或没有，这表明无尾两栖类眼介质的透射率特性可能与系统发育。
The amount of short wavelength (ultraviolet (UV), violet and blue) light that reaches the retina depends on the transmittance properties of the ocular media, especially the lens, and varies greatly across species in all vertebrate groups studied previously. We measured the lens transmittance in 32 anuran amphibians with different habits, geographical distributions and phylogenetic positions and used them together with eye size and pupil shape to evaluate the relationship with diel activity pattern, elevation and latitude. We found an unusually high lens UV transmittance in the most basal species, and a cut-off range that extends into the visible spectrum for the rest of the sample, with lenses even absorbing violet light in some diurnal species. However, other diurnal frogs had lenses that transmit UV light like the nocturnal species. This unclear pattern in the segregation of ocular media transmittance and diel activity is shared with other vertebrates and is consistent with the absence of significant correlations in our statistical analyses. Although we did not detect a significant phylogenetic effect, closely related species tend to have similar transmittances, irrespective of whether they share the same diel pattern or not, suggesting that anuran ocular media transmittance properties might be related to phylogeny.