A5054091204- Plant responses to elevated CO2
- Plant Water Relations and Carbon Dynamics
- Plant Stress Responses and Tolerance
- Atmospheric chemistry and aerosols
- Forest ecology and management
- Plant Gene Expression Analysis
- Plant biochemistry and biosynthesis
- Forest Insect Ecology and Management
- Tree-ring climate responses
- Antioxidant Activity and Oxidative Stress
- Light effects on plants
- Horticultural and Viticultural Research
- Plant tissue culture and regeneration
- Bioenergy crop production and management
- Fire effects on ecosystems
- Species Distribution and Climate Change
- Ecology and Vegetation Dynamics Studies
- Plant Molecular Biology Research
- Photosynthetic Processes and Mechanisms
- Crop Yield and Soil Fertility
- Seed Germination and Physiology
- Atmospheric Ozone and Climate
- Enzyme-mediated dye degradation
- Microbial Metabolism and Applications
- Plant nutrient uptake and metabolism
University of Eastern Finland
2015-2024
Finland University
2011-2012
Finnish Environment Institute
2007-2009
Joensuu Science Park
2007
University of Oulu
1999-2002
Silver birch (Betula pendula) is a pioneer boreal tree that can be induced to flower within 1 year. Its rapid life cycle, small (440-Mb) genome, and advanced germplasm resources make an attractive model for forest biotechnology. We assembled chromosomally anchored the nuclear genome of inbred B. pendula individual. Gene duplicates from paleohexaploid event were enriched transcriptional regulation, whereas tandem overrepresented by environmental responses. Population resequencing 80...
ABSTRACT Context : Ozone concentrations near the land surface are rising in Asia while they declining or stagnating Europe and North America. is most widespread air pollutant negatively affecting vegetation, its increased pose a major threat to food quality production other ecosystem services Asia. Method In this review, we provide an overview of scientific challenges impacts ozone pollution on Asian synthesize toward mitigation impacts. Result We argue that new policy initiatives need seek...
The overwintering of trees in northern areas depends on processes regulated by photoperiod and temperature. To identify the physiological genetic factors involved this environmental control, three latitudinal ecotypes pubescent birch (Betula pubescens Ehrh.) growing a common garden experiment were used. Each ecotype responded to shortening according its specific critical daylength, resulting induction freezing tolerance dehydration buds first ecotype, followed central southern ecotypes,...
Northern forest trees are challenged to adapt changing climate, including global warming and increasing tropospheric ozone (O3) concentrations. Both elevated O3 temperature can cause significant changes in volatile organic compound (VOC) emissions as well leaf anatomy that be related adaptation or increased stress tolerance, signs of damage. Impacts moderately (1.3× ambient) (ambient + 1 °C), alone combination, on VOC structure two genotypes (2.2 5.2) European aspen (Populus tremula L.) were...
Volatile organic compounds (VOCs) are expected to have an important role in plant adaptation high temperatures. The impacts of increasing night-time temperature on daytime terpenoid emissions and related gene expression silver birch (Betula pendula) European aspen (Populus tremula) clones were studied. plants grown under five different temperatures (6, 10, 14, 18, 22 degrees C) while was kept at a constant C. VOC collected during the analysed by gas chromatography-mass spectrometry (GC-MS)....
Ozone is an air pollutant that causes oxidative stress by generation of reactive oxygen species (ROS) within the leaf. The capacity to detoxify ROS and repair ROS-induced damage may contribute ozone tolerance. Ascorbate glutathione are known be key players in detoxification. effects on their biosynthesis amino acid metabolism were investigated three Euramerican poplar genotypes (Populus deltoides Bartr. × Populus nigra L.) differing sensitivity. Total ascorbate contents increased response...
Callus cultures from shoot tips of mature Scots pine ( Pinus sylvestris L.) were characterized by rapid browning and an inability to regenerate. The peroxidase (POD) polyphenol oxidase (PPO) activities relationship in such compared with embryogenic non‐embryogenic pine, started immature embryos three different clones. callus derived buds was visible approximately after 2 weeks culture, continued thereafter until the dark brown poorly growing. induced showed either light yellow coloring or...
Abstract Current and future ozone concentrations have the potential to reduce plant growth increase carbon demand for defence repair processes, which may result in reduced sink strength of forest trees long‐term. Still, there is limited understanding regarding alterations metabolism variation tolerance among tree species genotypes. Therefore, this paper aims study changes birch leaf metabolome due long‐term realistic stress relate these shifts with responses. Two European white ( Betula...
Rising temperature and tropospheric ozone (O3) concentrations are likely to affect carbon assimilation processes thus the sink strength of trees. In this study, we investigated joint action elevated on silver birch (Betula pendula) European aspen (Populus tremula) saplings in field conditions by combining free-air exposure (1.2 × ambient) infrared heaters (ambient +1.2 °C). At leaf level measurements, decreased net photosynthesis (Pn), while response was dependent position within foliage....
Northern forests are currently experiencing increasing mean temperatures, especially during autumn and spring. Consequently, alterations in carbon sequestration, leaf biochemical quality freezing tolerance (FT) likely to occur. The interactive effects of elevated temperature ozone (O3), the most harmful phytotoxic air pollutant, on Norway spruce (Picea abies (L.) Karst.) seedlings were studied by analysing phenology, metabolite concentrations needles, FT gas exchange. Sampling was performed...
Relative air humidity (RH) is expected to increase in northern Europe due climate change. Increasing RH reduces the difference of water vapour pressure deficit (VPD) between leaf and atmosphere, affects gas exchange plants. Little known about effects decreased VPD on plant metabolism, especially under field conditions. This study was conducted determine artificially silver birch (Betula pendula Roth.) hybrid aspen (Populus tremula L.×P. tremuloides Michx.) foliar metabolite nutrient profiles...
Eleven local cultivars of wheat (Triticum aestivum) were chosen to study the effect ambient ozone (O3) concentration in Indo-Gangetic Plains (IGP) India at two high-ozone experimental sites by using 300 ppm Ethylenediurea (EDU) as a chemical protectant against O3. The O3 level was more than double critical threshold reported for grain production (AOT40 8.66 h). EDU-grown plants had higher yield, biomass, stomatal conductance and photosynthesis, less lipid peroxidation, changes superoxide...
Forests are increasingly exposed to extreme global warming-induced climatic events. However, the immediate and carry-over effects of events on forests still poorly understood. Gross primary productivity (GPP) capacity is regarded as a good proxy ecosystem's functional stability, reflecting its physiological response surroundings. Using eddy covariance data from 34 forest sites in Northern Hemisphere, we analyzed late-spring frost (LSF) growing season drought needle-leaf broadleaf forests....
Long-term effects of elevated CO(2) and O(3) concentrations on gene expression in silver birch (Betula pendula Roth) leaves were studied during the end growing season. Two genotypes, clones 4 80, with different ozone growth responses, exposed to 2x ambient and/or open-top chambers (OTCs). Microarray analyses performed after 2 years exposure, transcriptional profiles compared key physiological characteristics leaf senescence. There genotypic differences responses O(3). Clone 80 exhibited...
Differences between genotypes are important for the ability of local populations to cope with environmental stress, especially in sessile, long-lived organisms such as trees. Despite importance, differences within traits relevant growth still unexplored. In this study, we examined genotypes, studying 13 physiological and morphological their relation growth, using 15 silver birch (Betula pendula Roth) representing a natural population. Our data show complex regulation under field conditions....
Air humidity indicated as vapour pressure deficit (VPD) is directly related to transpiration and stomatal function of plants. We studied the effects VPD nitrogen (N) supply on leaf metabolites, plant growth, mineral nutrition with young micropropagated silver birches (Betula pendula Roth.) in a growth chamber experiment. Plants that were grown under low for 26 d had higher biomass, larger stem diameter, more leaves, fewer fallen total area than plants high VPD. Initially, increased height...
The cuticular wax layer on silver birch (Betula pendula Roth) leaves is rich in cyclic secondary metabolites that provide defense against various environmental factors. Micropropagated trees from the southern (60°N), central (62°N), and northern (66°N) latitudes of Finland were grown a common garden setup quantified for variation leaf surface other traits, their association with genotype provenance was studied. 12 genotypes studied differed greatly quantity metabolites, both individual...