Hypothesis on monochromatic vision in scorpionflies questioned by new transcriptomic data.
Hypothesis on monochromatic vision in scorpionflies questioned by new transcriptomic data.
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DOI：
10.1038/s41598-018-28098-2
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发表时间：
2018-06-29
影响因子：
4.6
通讯作者：
Pass G
中科院分区：
文献类型：
--
作者：
Böhm A;Meusemann K;Misof B;Pass G
最近的一项研究表明，蝎蝇 Panorpa 具有单色视觉，因为在转录组数据中只发现了一种视蛋白。为了重新考虑这一假设，本研究使用 21 个物种的转录组数据研究了视蛋白表达，其中包括蝎蝇（长翅目）所有主要谱系的代表及其近亲跳蚤（虹翅目）的三个科的代表。在大多数研究的长翅目物种中，转录本编码两种视蛋白，其预测峰值吸光度在绿色、两种在蓝色、一种在紫外光谱区。只有在单眼减少或缺失的群体中，例如 Caurinus 和 Apteropanorpa，才鉴定出少于 4 个视觉视蛋白信使 RNA。此外，我们在长翅目 Nannochorista 幼虫和两种跳蚤的转录组数据中发现了 Rh7 样视蛋白。在两种长翅目动物中观察到了Peropsin 的表达。根据这些新数据，我们对帕诺帕属单色视觉的假设提出质疑。从更广泛的系统发育角度来看，单系类群 Antliophora（双翅目、长翅目和管翅目）的共同祖先拥有全套视觉视蛋白，即 Rh7 样视蛋白，此外还有翼视蛋白和视蛋白。在进化过程中，该进化枝的几个谱系中的单个视蛋白可能会丢失。
In the scorpionfly Panorpa, a recent study suggested monochromatic vision due to evidence of only a single opsin found in transcriptome data. To reconsider this hypothesis, the present study investigates opsin expression using transcriptome data of 21 species including representatives of all major lineages of scorpionflies (Mecoptera) and of three families of their closest relatives, the fleas (Siphonaptera). In most mecopteran species investigated, transcripts encode two opsins with predicted peak absorbances in the green, two in the blue, and one in the ultraviolet spectral region. Only in groups with reduced or absent ocelli, like Caurinus and Apteropanorpa, less than four visual opsin messenger RNAs have been identified. In addition, we found a Rh7-like opsin in transcriptome data derived from larvae of the mecopteran Nannochorista, and in two flea species. Peropsin expression was observed in two mecopterans. In light of these new data, we question the hypothesis on monochromatic vision in the genus Panorpa. In a broader phylogenetic perspective, it is suggested that the common ancestor of the monophyletic taxon Antliophora (Diptera, Mecoptera and Siphonaptera) possessed the full set of visual opsins, a Rh7-like opsin, and in addition a pteropsin as well as a peropsin. In the course of evolution individual opsins were likely lost in several lineages of this clade.
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影响因子：
3.7
作者：
Chen QX;Hua BZ
通讯作者：
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影响因子：
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Hoang DT;Chernomor O;von Haeseler A;Minh BQ;Vinh LS
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通讯作者：
UniProt Consortium
影响因子：
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作者：
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通讯作者：
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