論文

査読有り
2018年1月1日

Highly sensitive avoidance plays a key role in sensory adaptation to deep-sea hydrothermal vent environments

PLoS ONE
  • Tetsuya Ogino
  • ,
  • Shingo Maegawa
  • ,
  • Shuichi Shigeno
  • ,
  • Katsunori Fujikura
  • ,
  • Haruhiko Toyohara

13
1
開始ページ
e0189902
終了ページ
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1371/journal.pone.0189902
出版者・発行元
Public Library of Science

The environments around deep-sea hydrothermal vents are very harsh conditions for organisms due to the possibility of exposure to highly toxic compounds and extremely hot venting there. Despite such extreme environments, some indigenous species have thrived there. Alvi-nellid worms (Annelida) are among the organisms best adapted to high-temperature and oxida-tively stressful venting regions. Although intensive studies of the adaptation of these worms to the environments of hydrothermal vents have been made, little is known about the worms’ sensory adaptation to the severe chemical conditions there. To examine the sensitivity of the vent-endemic worm Paralvinella hessleri to low pH and oxidative stress, we determined the concentration of acetic acid and hydrogen peroxide that induced avoidance behavior of this worm, and compared these concentrations to those obtained for related species inhabiting intertidal zones, Thelepus sp. The concentrations of the chemicals that induced avoidance behavior of P. hessleri were 10–100 times lower than those for Thelepus sp. To identify the receptors for these chemicals, chemical avoidance tests were performed with the addition of ruthenium red, a blocker of transient receptor potential (TRP) channels. This treatment suppressed the chemical avoidance behavior of P. hessleri, which suggests that TRP channels are involved in the chemical avoidance behavior of this species. Our results revealed for the first time hypersensitive detection systems for acid and for oxidative stress in the vent-endemic worm P. hessleri, possibly mediated by TRP channels, suggesting that such sensory systems may have facilitated the adaptation of this organism to harsh vent environments.

リンク情報
DOI
https://doi.org/10.1371/journal.pone.0189902
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/29298328
ID情報
  • DOI : 10.1371/journal.pone.0189902
  • ISSN : 1932-6203
  • PubMed ID : 29298328
  • SCOPUS ID : 85040011257

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