Characterization and Comparison of Eye Development and Phototransduction Genes in Deep- and Shallow-Water Shrimp <i>Alvinocaris longirostris</i> and <i>Palaemon carinicauda</i>
The investigations of the molecular components of eye development and phototransduction in deep-sea species are important to elucidate the mechanism of their adaptation to dim light. In this study, eye transcriptomes of the shrimp <i>Alvinocaris longirostris</i> from the deep-sea chemosy...
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MDPI AG
2022-08-01
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| author | Min Hui Qian Xin Jiao Cheng Zhongli Sha |
| author_facet | Min Hui Qian Xin Jiao Cheng Zhongli Sha |
| author_sort | Min Hui |
| collection | DOAJ |
| description | The investigations of the molecular components of eye development and phototransduction in deep-sea species are important to elucidate the mechanism of their adaptation to dim light. In this study, eye transcriptomes of the shrimp <i>Alvinocaris longirostris</i> from the deep-sea chemosynthetic ecosystem and the shallow-water shrimp <i>Palaemon carinicauda</i> were compared. Two <i>Pax6</i> homologs with low expression levels were identified in both species, which are essential transcription factors in eye development. This finding implies that the development of the two shrimp eyes at early embryo–larvae stages might be similar. The multiple components of the phototransduction pathway were identified in both species. However, the number of phototransduction components was significantly reduced in <i>A. longirostris</i>, as well as expression level. Particularly, short-wavelength/UV-sensitive (SWS/UVS) <i>opsins</i> were absent in <i>A. longirostris</i> and only one putative middle-wavelength-sensitive (MWS) <i>opsin</i> was identified in this species. The conserved sites and structures of the putative LWS opsins were found between deep-sea and shallow-water decapods, indicating that the opsins in deep-sea crustaceans may also conserve their spectral absorption and signal transduction function. Phylogenetic analyses supported the monophyly of LWS opsins and SWS/UVS opsins in arthropods, while the MWS clade fell outside of the main arthropod LWS clade. The results are expected to provide baseline for study of visual adaptation in deep-sea shrimps. |
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| issn | 1424-2818 |
| language | English |
| last_indexed | 2024-03-09T13:33:56Z |
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| spelling | doaj.art-029f49c2de63443ca759676ad1f9f42c2023-11-30T21:14:36ZengMDPI AGDiversity1424-28182022-08-0114865310.3390/d14080653Characterization and Comparison of Eye Development and Phototransduction Genes in Deep- and Shallow-Water Shrimp <i>Alvinocaris longirostris</i> and <i>Palaemon carinicauda</i>Min Hui0Qian Xin1Jiao Cheng2Zhongli Sha3Department of Marine Organism Taxonomy & Phylogeny, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, ChinaDepartment of Marine Organism Taxonomy & Phylogeny, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, ChinaDepartment of Marine Organism Taxonomy & Phylogeny, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, ChinaDepartment of Marine Organism Taxonomy & Phylogeny, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, ChinaThe investigations of the molecular components of eye development and phototransduction in deep-sea species are important to elucidate the mechanism of their adaptation to dim light. In this study, eye transcriptomes of the shrimp <i>Alvinocaris longirostris</i> from the deep-sea chemosynthetic ecosystem and the shallow-water shrimp <i>Palaemon carinicauda</i> were compared. Two <i>Pax6</i> homologs with low expression levels were identified in both species, which are essential transcription factors in eye development. This finding implies that the development of the two shrimp eyes at early embryo–larvae stages might be similar. The multiple components of the phototransduction pathway were identified in both species. However, the number of phototransduction components was significantly reduced in <i>A. longirostris</i>, as well as expression level. Particularly, short-wavelength/UV-sensitive (SWS/UVS) <i>opsins</i> were absent in <i>A. longirostris</i> and only one putative middle-wavelength-sensitive (MWS) <i>opsin</i> was identified in this species. The conserved sites and structures of the putative LWS opsins were found between deep-sea and shallow-water decapods, indicating that the opsins in deep-sea crustaceans may also conserve their spectral absorption and signal transduction function. Phylogenetic analyses supported the monophyly of LWS opsins and SWS/UVS opsins in arthropods, while the MWS clade fell outside of the main arthropod LWS clade. The results are expected to provide baseline for study of visual adaptation in deep-sea shrimps.https://www.mdpi.com/1424-2818/14/8/653alvinocarididaedeep seaopsinpax 6phototransductiontranscriptome |
| spellingShingle | Min Hui Qian Xin Jiao Cheng Zhongli Sha Characterization and Comparison of Eye Development and Phototransduction Genes in Deep- and Shallow-Water Shrimp <i>Alvinocaris longirostris</i> and <i>Palaemon carinicauda</i> Diversity alvinocarididae deep sea opsin pax 6 phototransduction transcriptome |
| title | Characterization and Comparison of Eye Development and Phototransduction Genes in Deep- and Shallow-Water Shrimp <i>Alvinocaris longirostris</i> and <i>Palaemon carinicauda</i> |
| title_full | Characterization and Comparison of Eye Development and Phototransduction Genes in Deep- and Shallow-Water Shrimp <i>Alvinocaris longirostris</i> and <i>Palaemon carinicauda</i> |
| title_fullStr | Characterization and Comparison of Eye Development and Phototransduction Genes in Deep- and Shallow-Water Shrimp <i>Alvinocaris longirostris</i> and <i>Palaemon carinicauda</i> |
| title_full_unstemmed | Characterization and Comparison of Eye Development and Phototransduction Genes in Deep- and Shallow-Water Shrimp <i>Alvinocaris longirostris</i> and <i>Palaemon carinicauda</i> |
| title_short | Characterization and Comparison of Eye Development and Phototransduction Genes in Deep- and Shallow-Water Shrimp <i>Alvinocaris longirostris</i> and <i>Palaemon carinicauda</i> |
| title_sort | characterization and comparison of eye development and phototransduction genes in deep and shallow water shrimp i alvinocaris longirostris i and i palaemon carinicauda i |
| topic | alvinocarididae deep sea opsin pax 6 phototransduction transcriptome |
| url | https://www.mdpi.com/1424-2818/14/8/653 |
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