A5037783582- Plant Molecular Biology Research
- Forest Ecology and Biodiversity Studies
- Mycorrhizal Fungi and Plant Interactions
- Forest Insect Ecology and Management
- Plant Pathogens and Fungal Diseases
- Plant-Microbe Interactions and Immunity
- Enzyme-mediated dye degradation
- Plant Stress Responses and Tolerance
- Plant Gene Expression Analysis
- Plant tissue culture and regeneration
- Plant Genetic and Mutation Studies
- Plant Parasitism and Resistance
- Plant Disease Resistance and Genetics
- Yeasts and Rust Fungi Studies
- Plant Reproductive Biology
- Fungal Biology and Applications
- Lignin and Wood Chemistry
- Chromosomal and Genetic Variations
- Legume Nitrogen Fixing Symbiosis
- Wood and Agarwood Research
- Horticultural and Viticultural Research
- Plant Water Relations and Carbon Dynamics
- Insect-Plant Interactions and Control
- Lichen and fungal ecology
- Wood Treatment and Properties
Norwegian Institute of Bioeconomy Research
2015-2024
Landscape Institute
2008-2012
University of Oslo
1996-2007
Zero to Three
2006
Forest Research Institute
2001-2006
Norske Skog (Norway)
2003-2005
Abstract Epigenetic variation is likely to contribute the phenotypic plasticity and adaptative capacity of plant species, may be especially important for long‐lived organisms with complex life cycles, including forest trees. Diverse environmental stresses hybridization/polyploidization events can create reversible heritable epigenetic marks that transmitted subsequent generations as a form molecular “memory”. changes might also ability plants colonize or persist in variable environments. In...
• Parasitism and saprotrophic wood decay are two fungal strategies fundamental for succession nutrient cycling in forest ecosystems. An opportunity to assess the trade-off between these is provided by pathogen decayer Heterobasidion annosum sensu lato. We report annotated genome sequence transcript profiling, as well quantitative trait loci mapping, of one member species complex: H. irregulare. Quantitative critical pathogenicity, rich transposable elements, orphan secreted genes, were...
• Norway spruce expresses a temperature-dependent epigenetic memory from the time of embryo development, which thereafter influences timing bud phenology. MicroRNAs (miRNAs)are endogenous small RNAs, exerting gene regulatory impacts. We have tested for their presence and differential expression. prepared concatemerized RNA libraries seedlings two full-sib families, originated seeds developed in cold warm environment. One family expressed distinct effects while other not. used available plant...
ABSTRACT The temperature during maternal reproduction affects adaptive traits in progenies of Norway spruce ( Picea abies (L) Karst.). Seed production a cold environment advances bud set and acclimation the autumn dehardening flushing spring, whereas warm reproductive delays timing these traits. We repeated crosses between same parents produced seeds under contrasting temperatures. Elevated temperatures were applied at different time points from female meiosis to embryogenesis, followed by...
Abstract Conifers are evolutionarily more ancient than their angiosperm counterparts, and thus some adaptive mechanisms features influenced by epigenetic appear highly displayed in these woody gymnosperms. such as Norway spruce have very long generation times life spans, well large genome sizes. This seemingly excessive amount of genomic DNA without apparent duplications could be a rich source sites for regulation modifications. In spruce, an important mechanism has been identified, called...
Abstract Plants can form an immunological memory known as defense priming, whereby exposure to a priming stimulus enables quicker or stronger response subsequent attack by pests and pathogens. Such of inducible defenses provides increased protection reduces allocation costs defense. Defense has been widely studied for short‐lived model plants such Arabidopsis , but little is about this phenomenon in long‐lived like spruce. We compared the effects pretreatment with sublethal fungal...
Polyphenolic parenchyma cells (PP cells) in Norway spruce (Picea abies (L.) Karst.) stem phloem play important roles constitutive and inducible defenses. To determine whether anatomical molecular changes PP are correlated with tree resistance, we infected two clones the pathogenic fungus Ceratocystis polonica (Siem.) C. Moreau. The induced significantly different lesion lengths clones, indicating that one clone was more resistant to (short lesions) than other (long lesions). After infection,...
Epigenetic memory affects the timing of bud burst phenology and expression burst-related genes in genetically identical Norway spruce epitypes a manner usually associated with ecotypes. In spruce, temperature-dependent epigenetic established during embryogenesis set reproducible predictable manner. We hypothesize that clinal variation these phenological traits, which is adaptation to growth under frost-free conditions, has an component. dehydrins (DHNs) have been extreme frost tolerance. DHN...
Epigenetic memory in Norway spruce affects the timing of bud burst and set, vitally important adaptive traits for this long-lived forest species. is established response to temperature conditions during embryogenesis. Somatic embryogenesis at different epitype inducing (EpI) temperatures closely mimics natural processes epigenetic formation seeds, giving rise epigenetically clonal plants a reproducible predictable manner, with respect altered phenology. MicroRNAs (miRNAs) other small...
Abstract In response to various stimuli, plants acquire resistance against pests and/or pathogens. Such acquired or induced allows rapidly adapt their environment. Spraying the bark of mature Norway spruce ( Picea abies ) trees with phytohormone methyl jasmonate (MeJA) enhances tree‐killing beetles and associated phytopathogenic fungi. Analysis chemical defenses beetle colonization success suggests that MeJA treatment both directly induces immune responses primes inducible for a faster...
ABSTRACT Pathogen colonization and transcript levels of three host chitinases, putatively representing classes I, II, IV, were monitored with real-time PCR after wounding bark infection by Heterobasidion annosum in 32-year-old trees Norway spruce ( Picea abies ) low (clone 409) or high 589) resistance to this pathogen. Three days inoculation, comparable observed both clones the area immediately adjacent inoculation. At 14 infection, pathogen was restricted site inoculation for clone 589 but...
The GH61 represents the most enigmatic Glycoside Hydrolase family (GH) regarding enzymatic activity and importance in cellulose degradation. Heterobasidion irregulare is a necrotizing pathogen white-rot fungus that causes enormous damages conifer forests. genome of H. allowed identification ten HiGH61 genes. qRT-PCR analysis separate members into two groups; one show up regulation on lignocellulosic substrates (HiGH61A, HiGH61B, HiGH61D, HiGH61G, HiGH61H, HiGH61I) second showing either...
ABSTRACT A multiplex real-time PCR assay was developed to monitor the dynamics of Picea abies - Heterobasidion annosum pathosystem. Tissue cultures and 32-year-old trees with low or high resistance this pathogen were used as host material. Probes primers based on a laccase gene for polyubiquitin host. The procedure compared an ergosterol-based quantification method in tissue culture experiment, there strong correlation (product moment coefficient, 0.908) between data sets. had higher...
A 1149 bp genomic fragment corresponding to the 5' non-coding region of PgD1 (Picea glauca Defensin 1) gene was cloned, characterized, and compared with all Arabidopsis thaliana defensin promoters. The cloned found contain several motifs specific defence or hormonal response, including a motif involved in methyl jasmonate reponse, fungal elicitor responsive element, TC-rich repeat cis-acting element stress responsiveness. functional analysis promoter performed using uidA (GUS) reporter...