Øystein Johnsen

Best Publications

• Tree and forest functioning in response to global warming

  Henrik Saxe;Melvin G. R. Cannell;Øystein Johnsen;Michael G. Ryan

  1011
  Citations

• Epigenetic regulation of adaptive responses of forest tree species to the environment.

  Katharina Bräutigam;Kelly J. Vining;Clément Lafon-Placette;Carl G. Fossdal

  367
  Citations

• Genetic consequences of glacial survival and postglacial colonization in Norway spruce: combined analysis of mitochondrial DNA and fossil pollen.

  Mari Mette Tollefsrud;Roy Kissling;Felix Gugerli;Øystein Johnsen

  326
  Citations

• Climatic adaptation in Picea abies progenies is affected by the temperature during zygotic embryogenesis and seed maturation

  Øystein Johnsen;Carl Gunnar Fossdal;Nina Nagy;Jørgen Mølmann

  179
  Citations

• Timing of bud set in Picea abies is regulated by a memory of temperature during zygotic and somatic embryogenesis

  Harald Kvaalen;Øystein Johnsen

  178
  Citations

• MicroRNAs, the epigenetic memory and climatic adaptation in Norway spruce

  Igor A. Yakovlev;Carl Gunnar Fossdal;Øystein Johnsen

  171
  Citations

• Daylength and temperature during seed production interactively affect adaptive performance of Picea abies progenies.

  Øystein Johnsen;Ola Gram Dæhlen;Geir Østreng;Tore Skrøppa

  144
  Citations

• Climatic control of bud burst in young seedlings of nine provenances of Norway spruce.

  Gunnhild Søgaard;Oystein Johnsen;Jarle Nilsen;Olavi Junttila

  115
  Citations

• An adaptive epigenetic memory in conifers with important implications for seed production

  Igor Yakovlev;Carl Gunnar Fossdal;Tore Skrøppa;Jorunn E. Olsen

  107
  Citations

• Differential gene expression related to an epigenetic memory affecting climatic adaptation in Norway spruce

  Igor A. Yakovlev;Daniel K.A. Asante;Daniel K.A. Asante;Carl Gunnar Fossdal;Olavi Junttila

  101
  Citations

• Temperature-dependent differential transcriptomes during formation of an epigenetic memory in Norway spruce embryogenesis

  Igor A. Yakovlev;YeonKyeong Lee;Björn Rotter;Jorunn E. Olsen

  94
  Citations

• Effects of red, far‐red and blue light in maintaining growth in latitudinal populations of Norway spruce (Picea abies)

  Jørgen Alexander Mølmann;Olavi Junttila;Oystein Johnsen;Jorunn Elisabeth Olsen

  89
  Citations

• Variations in cryotolerance of embryogenic Picea abies cell lines and the association to genetic, morphological, and physiological factors

  J. V. Nørgaard;V. Duran;Ø. Johnsen;P. Krogstrup

  87
  Citations

• Dehydrins expression related to timing of bud burst in Norway spruce

  Igor A. Yakovlev;Daniel K. A. Asante;Daniel K. A. Asante;Carl Gunnar Fossdal;Jouni Partanen

  85
  Citations

• Rapid change in adaptive performance from one generation to the next in Picea abies—Central European trees in a Nordic environment

  Tore Skrøppa;Mari Mette Tollefsrud;Christoph Sperisen;Øystein Johnsen

  79
  Citations

• Analysis of gene expression during bud burst initiation in Norway spruce via ESTs from subtracted cDNA libraries

  Igor A. Yakovlev;Carl-Gunnar Fossdal;Øystein Johnsen;Olavi Junttila

  76
  Citations

• Freezing tolerance in two Norway spruce (Picea abies [L.] Karst.) progenies is physiologically correlated with drought tolerance.

  Constanze Blödner;Torre Skroppa;Øystein Johnsen;Andrea Polle

  76
  Citations

• Effects of the parental environment on full-sib families of Pinussylvestris

  Ingegerd Dormling;Øystein Johnsen

  74
  Citations

• Influence of the female flowering environment on autumn frost-hardiness of Picea abies progenies

  Ø. Johnsen;T. Skrøppa;O. Junttila;O. G. Dæhlen

  74
  Citations

• Field performance and early test results of offspring from two Norway spruce seed orchards containing clones transferred to warmer climates

  Tore SkrøppaT. Skrøppa;Ketil KohmannK. Kohmann;Øystein JohnsenØ. Johnsen;Arne SteffenremA. Steffenrem

  72
  Citations

• Effects of Rhizoctonia infection and drought on peroxidase and chitinase activity in Norway spruce (Picea abies)

  Nina Elisabeth Nagy;Carl Gunnar Fossdal;Lars Sandved Dalen;Anders Lönneborg

  70
  Citations

• Phenotypic changes in progenies of northern clones of Picea abies (L) Karst. grown in a southern seed orchard

  Øystein Johnsen

  65
  Citations

• Sexual reproduction in a greenhouse and reduced autumn frost hardiness of Picea abies progenies.

  Øystein Johnsen;Tore Skrøppa;Gunnar Haug;Inger Apeland

  58
  Citations

• Dehydrins in maritime pine (Pinus pinaster) and their expression related to drought stress response

  Tania Velasco-Conde;Igor Yakovlev;Juan Pedro Majada;Ismael Aranda

  40
  Citations

• Local and systemic stress responses in Norway spruce: Similarities in gene expression between a compatible pathogen interaction and drought stress

  Carl Gunnar Fossdal;Nina Elisabeth Nagy;Øystein Johnsen;Lars Sandved Dalen

  35
  Citations

• The influence of root-zone temperature on growth of Betula pendula Roth.

  Ingjerd Solfjeld;Øystein Johnsen

  33
  Citations

• Effect of frost nights and day and night temperature during dormancy induction on frost hardiness, tolerance to cold storage and bud burst in seedlings of Norway spruce

  Gunnhild Søgaard;Gunnhild Søgaard;Aksel Granhus;Aksel Granhus;Øystein Johnsen

  31
  Citations

• Phenotypic changes in progenies of northern clones ofPicea abies(L.) Karst. grown in a southern seed orchard: III. Climatic damage and growth in a progeny trial

  Øystein Johnsen;Jon Dietrichson;Gisle Skaret

  30
  Citations