ナンキョクオキアミの発光器官制御ホルモンの探索
The Antarctic krill Euphausia superba has ten photophores, a single pair on the eyestalks, two pairs on the thorax, and four unpaired organs on the abdomen. The bioluminescence emitted by the photophores is used for camouflage from predators below and intraspecific communication. The photophores are...
| Main Authors: | , , , , , , , |
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| Format: | Report |
| Language: | Japanese |
| Published: |
神奈川大学総合理学研究所
2022
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10487/00018158 https://kanagawa-u.repo.nii.ac.jp/?action=repository_uri&item_id=15093 https://kanagawa-u.repo.nii.ac.jp/?action=repository_action_common_download&item_id=15093&item_no=1&attribute_id=18&file_no=1 |
| Summary: | The Antarctic krill Euphausia superba has ten photophores, a single pair on the eyestalks, two pairs on the thorax, and four unpaired organs on the abdomen. The bioluminescence emitted by the photophores is used for camouflage from predators below and intraspecific communication. The photophores are considered to be regulated by the nervous and endocrine systems, but hormonal molecules that control the photophores have never been identified. In this study, transcriptome analysis of the eyestalk from E. superba , which is the biggest ganglion in the central nervous system and most important endocrine organ in crustaceans, was conducted. As a result, a transcript encodeing red pigment-concentrating hormone (RPCH) was identified. RPCH is known to be secreted from nerve endings and act as a neurotransmitter and neuromodulator. Therefore, the Antarctic krill RPCH may regulate photophores on the thorax and abdomen. Moreover, ten transcripts encode pigment-dispersing hormone (PDH). PDH regulates the light-adapting migration of pigment granules in the distal pigment cells of the compound eye. The strong association between vision and bioluminescence suggests that some PDHs identified from the Antarctic krill may regulate photophores in addition to body color change. The transcriptomic data obtained in this study will contribute to further elucidation of the endocrine regulation of photophores in the Antarctic krill. 原著2021年度神奈川大学総合理学研究所共同研究助成論文 |
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