PhD, Research Scientist
Norwegian University of Life Sciences

P.O.Box 5003
N-1430 Ås

Phone: +47 96740783



Research area: plant cell and developmental biology, plant evo-devo

My main focus is on developmental mechanisms that control oriented cell divisions and 3D body patterning in plants. Working in Odd-Arne-Olsen´s lab, I focus on a large multi-domain membrane protein DEK1 with essential roles in cell fate specification and pattern formation in land plants. 

Selected publications

The DEK1 calpain Linker functions in three-dimensional body pattering in Physcomitrella patens.
Johansen W, Eugene A, Demko V, Perroud PF, Rensing S, Khaleel Mekhlif A and Olsen OA(2016)
Plant Physiol, in press: doi:
The phenotype of the CRINKLY4 deletion mutant of Physcomitrella patens suggests a broad role in developmental regulation in early land plants.
Demko V, Ako E, Perroud PF, Quatrano R, Olsen OA.
Planta. 2016 Jul;244(1):275-84. doi: 10.1007/s00425-016-2526-2. Epub 2016 Apr 21.
PMID: 27100110
DEK1; missing piece in puzzle of plant development.
Olsen OA, Perroud PF, Johansen W, Demko V.
Trends Plant Sci. 2015 Feb;20(2):70-1. doi: 10.1016/j.tplants.2015.01.003. Epub 2015 Jan 20.
PMID: 25612461
Genetic analysis of DEFECTIVE KERNEL1 loop function in three-dimensional body patterning in Physcomitrella patens.
Demko V, Perroud PF, Johansen W, Delwiche CF, Cooper ED, Remme P, Ako AE, Kugler KG, Mayer KF, Quatrano R, Olsen OA.
Plant Physiol. 2014 Oct;166(2):903-19. doi: 10.1104/pp.114.243758. Epub 2014 Sep 2.
PMID: 25185121
Defective Kernel 1 (DEK1) is required for three-dimensional growth in Physcomitrella patens.
Perroud PF, Demko V, Johansen W, Wilson RC, Olsen OA, Quatrano RS.
New Phytol. 2014 Aug;203(3):794-804. doi: 10.1111/nph.12844. Epub 2014 May 21.
PMID: 24844771
The catalytic domain CysPc of the DEK1 calpain is functionally conserved in land plants.
Liang Z, Demko V, Wilson RC, Johnson KA, Ahmad R, Perroud PF, Quatrano R, Zhao S, Shalchian-Tabrizi K, Otegui MS, Olsen OA, Johansen W.
Plant J. 2013 Sep;75(5):742-54. doi: 10.1111/tpj.12235. Epub 2013 Jun 13.
PMID: 23663131
Massive expansion of the calpain gene family in unicellular eukaryotes.
Zhao S, Liang Z, Demko V, Wilson R, Johansen W, Olsen OA, Shalchian-Tabrizi K.
BMC Evol Biol. 2012 Sep 29;12:193. doi: 10.1186/1471-2148-12-193.
PMID: 23020305