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Ocean Science Journal

, Volume 52, Issue 1, pp 127–138 | Cite as

Adaptation responses of individuals to environmental changes in the ciliate Euplotes crassus

  • Se-Joo Kim
  • Jin-Hyoung Kim
  • Se-Jong JuEmail author
Article
  • 107 Downloads

Abstract

Although the response unit of living organisms to environmental changes is at the individual level, most experiments on the adaptation responses of ciliates have been conducted in batches, comprising multiple-individuals, due to their microscopic size. However, here, we confirmed that individuals undergo different division cycles in monocultures of Euplotes crassus. They also exhibited transcript variations of 4.63-fold in SSU and of 22.78- fold in Hsp70. Additionally, in salt-stressed E. crassus individuals, SSU transcripts of individuals varied by 6.92-fold at 27 psu, 8.69- fold at 32 psu, and 2.51-fold at 37 psu. However, the maximum difference in Hsp70 was only 4.23-fold under all conditions. These results suggest there may be different biological rhythms even in siblings derived from the same parent. It can also be inferred that various environmental factors have different effects on different E. crassus individuals. Therefore, to elucidate relationships between organism adaptations and environmental changes, studies at the individual level should be conducted with multi-individual approaches.

Key words

adaptation ciliates environmental change gene expression individual difference 

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Copyright information

© Korea Ocean Research & Development Institute (KORDI) and the Korean Society of Oceanography (KSO) and Springer Science+Business Media Dordrecht 2017

Authors and Affiliations

  1. 1.Korean Bioinformation CenterKorea Research Institute Bioscience and BiotechnologyDaejeonKorea
  2. 2.Unit of Polar Genomics, Korea Polar Research InstituteKIOSTIncheonKorea
  3. 3.Deep-sea and Seabed Mineral Resources Research CenterKIOSTAnsanKorea
  4. 4.Marine Biology MajorUniversity of Science & TechnologyDaejeonKorea

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