Virpi Virjamo

Tarkenna hakuasi

Tutkin ilmaston lämpenemisen vaikutusta metsäpuiden puolustuskemiaan. Kiinnostuksen kohteenani on erityisesti muutokset fenoli- ja alkaloidikemiassa, sekä puolustusyhdistepitoisuuksien yhteys taimien kasvuun ja sienijuurien toimintaan.

Tiedot Julkaisut

Tutkimusryhmät

Peat&Trees - Suo- ja maaekologian tutkimusryh… 02.02.2012 -

Avainsanat

boreaaliset metsät ilmaston lämpeneminen kasvien puolustusaineet

Julkaisut

26/26 kappaletta

Characterisation, Recovery and Activity of Hydrophobic Compounds in Norway Spruce Log Soaking Pit Water: Could they be Used in Wood Preservative Formulations?
Barbero-López, Aitor; Vek, Viljem; Poljanšek, Ida; Virjamo, Virpi; López-Gómez, Yeray Manuel; Sainio, Tuomo; Humar, Miha; Oven, Primož; Haapala, Antti. 2022. Waste and biomass valorization. 13: 2553-2564
Responses in growth and emissions of biogenic volatile organic compounds in Scots pine, Norway spruce and silver birch seedlings to different warming treatments in a controlled field experiment
Pikkarainen, Laura; Nissinen, Katri; Ghimire, Rajendra Prasad; Kivimäenpää, Minna; Ikonen, Veli-Pekka; Kilpeläinen, Antti; Virjamo, Virpi; Yu, Hao; Kirsikka-Aho, Sara; Salminen, Timo; Hirvonen, Jukka; Vahimaa, Timo; Luoranen, Jaana; Peltola, Heli. 2022. Science of the total environment. 821:
Responses in growth and phenolics accumulation to lateral bud removal in male and female saplings of Populus tremula (L.) under simulated climate change
Sobuj, N; Virjamo, V; Nissinen, K; Sivadasan, U; Mehtätalo, L; Nybakken, L; Peltola, H; Julkunen-Tiitto, R. 2019. Science of the total environment. 2020; 704: 135462
A Seven-Year Study of Phenolic Concentrations of the Dioecious Salix myrsinifolia
Nissinen, Katri; Virjamo, Virpi; Mehtätalo, Lauri; Lavola, Anu; Valtonen, Anu; Nybakken, Line; Julkunen-Tiitto, Riitta. 2018. Journal of chemical ecology. 44: 416-430
Climate Change Effects on Secondary Compounds of Forest Trees in the Northern Hemisphere
Holopainen, Jarmo K; Virjamo, Virpi; Ghimire, Rajendra P; Blande, James D; Julkunen-Tiitto, Riitta; Kivimäenpää, Minna. 2018. Frontiers in plant science. 9: 1445
Dry-air drying at room temperature - a practical pre-treatment method of tree leaves for quantitative analyses of phenolics?
Tegelberg, Riitta; Virjamo, Virpi; Julkunen-Tiitto, Riitta. 2018. Phytochemical analysis. 29: 493-499
Effects of soil pyrene contamination on growth and phenolics in Norway spruce (Picea abies) are modified by elevated temperature and CO2
Zhang, Y; Virjamo, V; Du, W; Yin, Y; Nissinen, K; Nybakken, L; Guo, H; Julkunen-Tiitto, R. 2018. Environmental science and pollution research. 25: 12788-12799
Elevated temperature and CO2 affect responses of European aspen (Populus tremula) to soil pyrene contamination
Zhang, Y; Virjamo, V; Sobuj, N; Du, W; Yin, Y; Nybakken, L; Guo, H; Julkunen-Tiitto, R. 2018. Science of the total environment. 634: 150-157
Quality and quantity of piperidine alkaloids in needles and bark of Scots pine (Pinus sylvestris) seedlings
Virjamo, Virpi; Julkunen-Tiitto, Riitta. 2018. Phytochemistry letters. 26: 106-109
Sex-related responses of European aspen (Populus tremula L.) to combined stress: TiO2 nanoparticles, elevated temperature and CO2 concentration
Zhang, Y; Virjamo, V; Sobuj, N; Du, W; Yin, Y; Nybakken, L; Guo, H; Julkunen-Tiitto, R. 2018. Journal of hazardous materials. 352: 130-138
Effect of climate change on bud phenology of young aspen plants (Populus tremula. L)
Sivadasan Unni, Randriamanana Tendry, Chenhao Cao, Virjamo Virpi, Nybakken Line, Julkunen-Tiitto Riitta. 2017. Ecology and evolution. 7: 7998-8007
Epidihydropinidine, the main piperidine alkaloid compound of Norway spruce (Picea abies) shows promising antibacterial and anti-Candida activity
Fyhrquist P, Virjamo V, Hiltunen E, Julkunen-Tiitto R. 2017. Fitoterapia. 117: 138-146
Impacts of elevated temperature and CO2 concentration on growth and phenolics in the sexually dimorphic Populus tremula (L.)
Sobuj Norul, Virjamo Virpi, Zhang Yaodan, Nybakken Line, Julkunen-Tiitto Riitta. 2017. Environmental and experimental botany. 146: 34-44
Phytochemical variation in the plant-part specific phenols of wild crowberry (Empetrum hermaphroditum Hagerup) populations
Lavola Anu, Salonen Anneli, Virjamo Virpi, Julkunen-Tiitto Riitta. 2017. Phytochemistry letters. 21: 11-20
Production of glandular trichomes responds to water stress and temperature in silver birch (Betula pendula) leaves
Thitz P, Possen BJHM, Oksanen E, Mehtätalo L, Virjamo V, Vapaavuori E. 2017. Canadian journal of forest research-revue canadienne de recherche forestiere. 47: 1075-1081
Responses of growth and leaf phenolics in European aspen (Populus tremula) to climate change during juvenile phase change
Nissinen Katri, Virjamo Virpi, Randriamanana Tendry, Sobuj Norul, Sivadasan Unnikrishnan, Mehtatalo Lauri, Beuker Egbert, Julkunen-Tiitto Riitta, Nybakken Line. 2017. Canadian journal of forest research-revue canadienne de recherche forestiere. 47: 1350-1363
Screening bioactivity and bioactive constituents of Nordic unifloral honeys
Salonen Anneli, Virjamo Virpi, Tammela Päivi, Fauch Laure, Julkunen-Tiitto Riitta. 2017. Food chemistry. 237: 214-224
Slow-growing Salix repens (Salicaceae) benefits from changing climate
Nissinen Katri, Nybakken Line, Virjamo Virpi, Julkunen-Tiitto Riitta. 2016. Environmental and Experimental Botany. 128: 59-68
Variation in piperidine alkaloid chemistry of Norway spruce (Picea abies) foliage in diverse geographic origins grown at the same area
Virjamo Virpi, Julkunen-Tiitto Riitta. 2016. Canadian journal of forest research-revue canadienne de recherche forestiere. 46: 456-460
Boreal woody species resistance affected by climate change
Julkunen-Tiitto R, Nybakken L, Randriamanana T, Virjamo V. Teoksessa: Christer Björkman, Pekka Niemelä(toim.) , 2015. Climate change and insect pests. s. 54-73. CABI
Combined effect of elevated UVB, elevated temperature and fertilization on growth, needle structure and phytochemistry of young Norway spruce (Picea abies) seedlings
Virjamo Virpi, Sutinen Sirkka, Julkunen-Tiitto Riitta. 2014. Global change biology. 20: 2252-2260
Differences in vole preference, secondary chemistry and nutrient levels between naturally regenerated and planted Norway spruce seedlings
Virjamo V, Julkunen-Tiitto R, Henttonen H, Hiltunen E, Karjalainen R, Korhonen J, Huitu O. 2013. Journal of chemical ecology. 39: 1322-1334
Piperidine alkaloids of Norway spruce (Picea abies L. Karsten): Relations with genotypes, season, environment and phenolics
Virjamo Virpi. 2013. Publications of the University of Eastern Finland. Dissertations in Forestry and Natural Sciences
Shoot development of Norway spruce (Picea abies) involves changes in piperidine alkaloids and condensed tannins
Virjamo V, Julkunen-Tiitto R. 2013. Trees-structure and function. Published online: DEC 2013: -
Effects of deficiency and overdose of group 2 sigma factors in triple inactivation strains of Synechocystis sp. strain PCC 6803
Pollari M, Rantamäki S, Huokko T, Kårlund-Marttila A, Virjamo V, Tyystjärvi E, Tyystjärvi T. 2011. Journal of bacteriology. 193: 265-273
Alkaloid content of nursery garden seedlings and natural seedlings of Norway spruce (Picea abies)
Virjamo V, Julkunen-Tiitto R, Hiltunen E. 2010. Planta medica

Tarkenna hakuasi

Tutkimusryhmät

Avainsanat

Characterisation, Recovery and Activity of Hydrophobic Compounds in Norway Spruce Log Soaking Pit Water: Could they be Used in Wood Preservative Formulations?

Responses in growth and emissions of biogenic volatile organic compounds in Scots pine, Norway spruce and silver birch seedlings to different warming treatments in a controlled field experiment

Responses in growth and phenolics accumulation to lateral bud removal in male and female saplings of Populus tremula (L.) under simulated climate change

A Seven-Year Study of Phenolic Concentrations of the Dioecious Salix myrsinifolia

Climate Change Effects on Secondary Compounds of Forest Trees in the Northern Hemisphere

Dry-air drying at room temperature - a practical pre-treatment method of tree leaves for quantitative analyses of phenolics?

Effects of soil pyrene contamination on growth and phenolics in Norway spruce (Picea abies) are modified by elevated temperature and CO2

Elevated temperature and CO2 affect responses of European aspen (Populus tremula) to soil pyrene contamination

Quality and quantity of piperidine alkaloids in needles and bark of Scots pine (Pinus sylvestris) seedlings

Sex-related responses of European aspen (Populus tremula L.) to combined stress: TiO2 nanoparticles, elevated temperature and CO2 concentration

Effect of climate change on bud phenology of young aspen plants (Populus tremula. L)

Epidihydropinidine, the main piperidine alkaloid compound of Norway spruce (Picea abies) shows promising antibacterial and anti-Candida activity

Impacts of elevated temperature and CO2 concentration on growth and phenolics in the sexually dimorphic Populus tremula (L.)

Phytochemical variation in the plant-part specific phenols of wild crowberry (Empetrum hermaphroditum Hagerup) populations

Production of glandular trichomes responds to water stress and temperature in silver birch (Betula pendula) leaves

Responses of growth and leaf phenolics in European aspen (Populus tremula) to climate change during juvenile phase change

Screening bioactivity and bioactive constituents of Nordic unifloral honeys

Slow-growing Salix repens (Salicaceae) benefits from changing climate

Variation in piperidine alkaloid chemistry of Norway spruce (Picea abies) foliage in diverse geographic origins grown at the same area

Boreal woody species resistance affected by climate change

Combined effect of elevated UVB, elevated temperature and fertilization on growth, needle structure and phytochemistry of young Norway spruce (Picea abies) seedlings

Differences in vole preference, secondary chemistry and nutrient levels between naturally regenerated and planted Norway spruce seedlings

Piperidine alkaloids of Norway spruce (Picea abies L. Karsten): Relations with genotypes, season, environment and phenolics

Shoot development of Norway spruce (Picea abies) involves changes in piperidine alkaloids and condensed tannins

Effects of deficiency and overdose of group 2 sigma factors in triple inactivation strains of Synechocystis sp. strain PCC 6803

Alkaloid content of nursery garden seedlings and natural seedlings of Norway spruce (Picea abies)