PhD trial lecture and public defence: Tor Erik Jørgensen (FBA)

01 November 2018 10:15 - 01 November 2018 15:30

Auditorium Stein Rokkan (A2)

PhD candidate Tor Erik Jørgensen will hold a trial lecture and defend his thesis for the degree Philosophiae Doctor (PhD), at the Faculty of Biosciences and Aquaculture, Nord University.

Ph.d.-candidate Tor Erik Jørgensen

Titlel of thesis:

Molecular and evolutionary characterization of the Atlantic cod mitochondrial genome

Title of trial lecture:

Mitochondrial diversity in vertebrates: evolutionary perspective

Time of trial lecture: 10:15-11:15
Time of defence: 12:15 - 15:30
Place: Auditorium Stein Rokkan (A2)

Members of the evaluation committee:
- Research Director Dr. Benoit Masquida, The French National Centre for Scientific Research, Universitetet of Strasbourg, Frankrike
- Researcher Dr. Torild Johansen, Institute of marine research, Tromsø
- Prof.  Dr. Igor Babiak, FBA, Nord University (leader)

- Main supervisor: Professor Steinar Daae Johansen, FBA
- Co-supervisor: Professor Truls Moum, FBA
- Co-supervisor: Professor Jarle T. Nordeide

The PhD trial lecture and defence are open to the public. the thesis is available on request. Please contact Kristine Vevik, email:, phone 75 51 74 37

About the thesis:

Mitochondria are cytoplasmic bacterial-like organelles present in almost all eukaryotic cells and organisms. Mitochondria are the main supplier of the cellular energy (ATP), and have an important role in cell function regulation including innate immunity, stress responses, and apoptosis. The mitochondria contain residual small circular genomes that apparently are highly conserved among vertebrates.

In this thesis we have investigated molecular features of the mitochondrial genome in the Atlantic cod (Gadus morhua) and related codfishes using large-scale DNA and RNA sequencing. We have studied mitochondrial genome sequence variation among 200 specimens of the Atlantic cod representing different ecotypes and geographic locations.

The analyses were focused on long noncoding RNAs, and molecular hallmarks such as heteroplasmic tandem repeats and noncoding spacers. The Atlantic cod mitochondrial genome was found to be surprisingly variable with a gene content that includes undescribed and unknown genes.

This work provides new knowledge on vertebrate mitochondrial genomes in general, and Atlantic cod and codfishes more specifically. 

Link for streaming: