PDF(Pubmed)
Abstract：
Knowledge of crustacean vision is lacking compared to the more well-studied vertebrates and insects. While crustacean visual systems are typically conserved morphologically, the molecular components (i.e. opsins) remain understudied. This review aims to characterize opsin diversity across crustacean lineages for an integrated view of visual system evolution. Using publicly available data from 95 species, we identified opsin sequences and classified them by clade. Our analysis produced 485 putative visual opsins and 141 non-visual opsins. The visual opsins were separated into six clades: long wavelength sensitive (LWS), middle wavelength sensitive (MWS) 1 and 2, short wavelength or ultraviolet sensitive (SWS/UVS) and a clade of thecostracan opsins, with multiple LWS and MWS opsin copies observed. The SWS/UVS opsins were relatively conserved in most species. The crustacean classes Cephalocarida, Remipedia and Hexanauplia exhibited reduced visual opsin diversity compared to others, with the malacostracan decapods having the highest opsin diversity. Non-visual opsins were identified from all investigated classes except Cephalocarida. Additionally, a novel clade of non-visual crustacean-specific, R-type opsins (Rc) was discovered. This review aims to provide a framework for future research on crustacean vision, with an emphasis on the need for more work in spectral characterization and molecular analysis. This article is part of the theme issue \'Understanding colour vision: molecular, physiological, neuronal and behavioural studies in arthropods\'.
摘要：
与研究较多的脊椎动物和昆虫相比，缺乏甲壳动物视觉知识。虽然甲壳动物的视觉系统通常在形态上是保守的，分子组分（即视蛋白）仍未得到充分研究。这篇综述旨在表征甲壳类动物谱系的视蛋白多样性，以综合观察视觉系统的进化。使用来自95个物种的公开数据，我们鉴定了视蛋白序列并按进化枝分类。我们的分析产生了485个推定的视觉视蛋白和141个非视觉视蛋白。视觉视蛋白分为六个分支：长波长敏感（LWS），中波长敏感（MWS）1和2，短波长或紫外线敏感（SWS/UVS）和一枝状的近生视蛋白，观察到多个LWS和MWS视蛋白拷贝。SWS/UVS视蛋白在大多数物种中相对保守。甲壳类动物头颅，与其他相比，Remipedia和Hexanauplia表现出减少的视觉视蛋白多样性，malacostracan十足动物具有最高的视蛋白多样性。从除头颅外的所有研究类别中鉴定出非视觉视蛋白。此外,一种新的非视觉甲壳类动物进化枝，发现了R型视蛋白(Rc)。这篇综述旨在为未来甲壳类动物视觉研究提供一个框架，强调在光谱表征和分子分析方面需要更多的工作。这篇文章是主题问题的一部分\'理解色彩视觉：分子，生理,节肢动物的神经元和行为研究。
