Plants have evolved numerous ways to escape damage by antagonists. With changing growing conditions, mainly caused by invasive species and effects of global warming, our natural habitats may be increasingly challenged. I am interested in all aspects of plant resistance that may help us under- stand how the risk of biotic stress may be reduced, including chemical and mechanical defence traits, tolerance, phenology displacement and ecological interactions that rescue plants from attack by antagonists. Currently, in my lab, we concentrate on studies of Populus tremula, Salix spp., and Brassica nigra.
Trait association studies and large-scale patterns in Populus
We relate a number of phenotypic traits measured on aspen (Populus tremula) genotypes in the field to assess heritability and resistance to herbivores and pathogens. The biobanks SwAsp (116 clones) and UmeAsp (450 clones) are important for these studies. Since 2004, biotic and abiotic damage to the SwAsp collection has been followed in the field in a G by E setup. We ask if geographical origin matters for resistance properties. Extreme clones (with intensive growth, early bud set, heavy damage by certain antagonists etc.) have been identified for later experimentation in bioassays. We also perform network analyses to understand the arthropod associated communities of our aspen genotypes and chemotypes.
We profile the metabolome in Populus, Salix and Brassica especially targeting natural products that may shape resistance to biotic stress. We are interested in the genetics of chemotypes within populations of aspen and between Salix species that display differences in resistance properties against arthropod herbivores and various micro-fungi. We are also interested in getting an organismal perspective on allocation responses in plants in response to various stresses including volatile emissions and induction of various metabolic pools. We use GC/MS to evaluate volatile emissions and general chemical profiles and LC/MS for profiling of specialized natural products (mainly phenolics and glucosinolates).
Studies on induced responses in aspen
We challenge genotypes that display extreme phenotypes by introducing antagonists in whole plant assays or on detached leaves. In aspen, we have for example worked with the aphid Quitophorous populetii the Chrysomela beetles, and the disease Melampsora magnusiana. The aim with these studies is to compare genotypic specific responses in the metabolome to different types of damage, and to test theories on resource allocation to growth and defence.
We have cultured the leaf beetle Chrysomela tremulae and three aphid species of the Quitophorous genus to perform these bioassays. We use choice and no-choice tests to describe preferences and performance of the insects when fed on extreme genotypes under various treatments.
|Some typical arthropods encountered in our common gardens: 1. Harmandia tremula a leaf-galling mite, 2. Bycticus sp. a leaf rolling weevil, 3. Chrysomela populi a leaf beetle that oviposits and chews on leaves, 4. Phyllocnistis labyrintella a leaf mining butterfly.
Volatile Collection Platform
Primary and secondary chemical compounds are extracted from aspen leaves to assess their value as feeding attractants and repellents. We use simple colorimetric analyses as well as advanced mass spectrometric separation techniques to study compounds of interest.
To study volatile responses to biotic stress and simulated stresses (MeJA, and mechanical damaged plants) we have established a volatile collection platform.This platform is created primary for studies of volatile emission in Brassica nigra, however, it is designed to also be used for other plant species.
Keefover-Ring K, Carlsson M, Albrectsen BR (2014). 2′-(Z)-Cinnamoylsalicortin: A novel salicinoid isolated from Populus tremula. Phytochemistry Letters; 7:212–216
Bernhardsson C, Robinson KM, Abreu IN, Jansson S, Albrectsen BR, Ingvarsson PK. (2013). Geographic structure in metabolome and herbivore community co-occurs with genetic structure in plant defence genes. Ecology Letters, 16 (6):791-798.
Robinsson KM, Ingvarsson PK, Jansson S, Albrectsen BR. (2012). Both spatial and genetic variation influence plant functional traits, a specialist-rich arthropod community, and their interaction. PLoS ONE 7(5): e37679. doi:10.1371/journal.pone.0037679
Abreu, IN, Ahnlund, M, Moritz, T. Albrectsen, BR. (2011). UHPLC-ESI/TOFMS Determination of Salicylate-like Phenolic Gycosides in Populus tremula Leaves. J Chem Ecol. 2011 37(8): 857–870. doi: 10.1007/s10886-011-9991-7.
Albrecnsen BR, Björkén L, Varad A, Hagner Å, Wedin M, Karlsson J and Jansson S (2010). Endophytic fungi in european Aspen (Populus tremula) leaves – diversity, detection, and a suggested correlation with herbivory resistance.Fungal Diversity 41:17-28
Albrectsen BR, Witzell J, Robinson K, Wulff S, Luquez VMC, Ågren R and Jansson S (2010). Large scale geographic clines of parasite damage to Populus tremula L.Ecography 33: 483-493
Luquez Virginia, Hall D, Albrectsen BR, Karlsson J, Ingvarsson P and Jansson S (2008). Natural phenological variation in aspen (Populus tremula): the SwAsp collection. Tree Genetics & Genomes Volume 4, Issue 2 , pp 279-292
Both plant genotype and herbivory shape aspen endophyte communities
Oecologia 2018, First Online: 01 March 2018
Does fungal endophyte inoculation affect the responses of aspen seedlings to carbon dioxide enrichment?
Fungal Ecology 2018,33:24–31
SIEVE ELEMENT-LINING CHAPERONE 1 restricts aphid feeding on Arabidopsis during heat stress
Plant Cell. 2017, 29 (10):2450-2464
Dual herbivore attack and herbivore density affect metabolic profiles of Brassica nigra leaves
Plant Cell Environ. 2017, 40(8):1356-1367
Central Metabolic Changes in O3 and Herbivory Affect Photosynthesis and Stomatal Closure
Plant Physiol 2016, 172 (3):2057-2078
Genotypic variability in Populus tremula L. affects how anthropogenic nitrogen enrichment influences litter decomposition
Plant Soil 2016, 410(1-2):467-481
Genotypic Tannin Levels in Populus tremula Impact the Way Nitrogen Enrichment Affects Growth and Allocation Responses for Some Traits and Not for Others
PLoS ONE 2015, 10(10): e0140971
Phenotype MicroArrays as a complementary tool to next generation sequencing for characterization of tree endophytes
Front. Microbiol., 2015, 6:1033
Relative impacts of environmental variation and evolutionary history on the nestedness and modularity of tree–herbivore networks
Ecology and Evolution 2015; 5(14): 2898–2915
Comparative physiology of allopatric Populus species: geographic clines in photosynthesis, height growth, and carbon isotope discrimination in common gardens
Front Plant Sci. 2015, 6:528
Nutritional niche overlap potentiates the use of endophytes in biocontrol of a tree disease
BioControl 2015, 60(5):655-667
Ozone affects growth and development of Pieris brassicae on the wild host plant Brassica nigra
Environ Pollut. 2015, 199C:119-129
Populus tremula (European aspen) shows no evidence of sexual dimorphism
BMC Plant Biol. 2014; 14(1):276
No Evidence of Geographical Structure of Salicinoid Chemotypes within Populus Tremula
PLoS ONE 2014; 9(10):e107189
2′-(Z)-Cinnamoylsalicortin: A novel salicinoid isolated from Populus tremula
Phytochemistry Letters, 2014; 7:212–216
Geographic structure in metabolome and herbivore community co-occurs with genetic structure in plant defence genes
Ecology Letters 2013, 16 (6):791-798
How slug herbivory of juvenile hybrid willows alters chemistry, growth and subsequent susceptibility to diverse plant enemies
ANNALS OF BOTANY 2013, 112 (4):757-765
Caseys C, Glauser G, Stölting KN, Christe C, Albrectsen BR, Lexer C
Effects of interspecific recombination on functional traits in trees revealed by metabolomics and genotyping-by-resequencing
Plant Ecology & Diversity 2012 Nov 13. [Epub ahead of print]
Albrectsen BR, Hansson C
The diversity and identification of eulophid parasitic
wasps (Hymenoptera: Chalcidoidea: Eulophidae) on
Phyllocnistis labyrinthella (Lepidoptera: Gracillariidae)
from Västerbotten, Sweden
Entomologisk Tidskrift 2012, 133(3): 111-118
Albrectsen BR, Witzell J
Disentangling functions of fungal endophytes in forest trees
In: Fungi: Types, Environmental Impact and Role in Disease, Chapter 12, pp. 235-246
Edited by: Adolfo Paz Silva, María Sol; Nova Science Publishers, Inc 2012
Robinson KM, Ingvarsson PK, Jansson S, Albrectsen BR
Genetic Variation in Functional Traits Influences Arthropod Community Composition in Aspen (Populus tremula L.)
PLoS ONE 2012; 7(5):e37679
Viswanath V, Albrectsen BR, Strauss SH
Global regulatory burden for field testing of genetically modified trees
Tree Genetics & Genomes: 2011 Nov 21
Abreu IN, Ahnlund M, Moritz T, Albrectsen BR
UHPLC-ESI/TOFMS determination of salicylate-like phenolic gycosides in Populus tremula leaves
Journal of Chemical Ecology: 2011 37:857-870
Gundale MJ, Sverker J, Albrectsen BR, Nilsson M-C, Wardle DA
Variation in protein complexation capacity among and within six plant species across a boreal forest chronosequence
Plant Ecology: 2010 211:253-266
Albrectsen BR, Björkén L, Varad A, Hagner Å, Wedin M, Karlsson J, Jansson S
Endophytic fungi in European aspen (Populus tremula) leaves-diversity, detection, and a suggested correlation with herbivory resistance
Fungal Diversity: 2010 41:17-28
Saona NM, Albrectsen BR, Ericson L, Bazely DR
Environmental stresses mediate endophyte-grass interactions in a boreal archipelago
Journal of Ecology: 2010 98:470-479.
Albrectsen BR, Witzell J, Robinson KM, Wulff S, Luquez VMC, Ågren R, Jansson S
Large scale geographic clines of parasite damage to Populus tremula L.
Ecography: 2010 33:483-493
Crutsinger GM, Sanders NJ, Albrectsen BR, Abreu IN, Wardle DA
Ecosystem retrogression leads to increased insect abundance and herbivory across an island chronosequence
Functional Ecology: 2008 22:816-823
Albrectsen BR, Ericson L, Lundberg P
Nutrient addition extends flowering display, which gets tracked by seed predators, but not by their parasitoids
Oikos: 2008 117:473-480
Luquez V, Hall D, Albrectsen BR, Karlsson J, Ingvarsson P, Jansson S
Natural phenological variation in aspen (Populus tremula): the SwAsp collection
Tree Genetics & Genomes: 2008 4:279-292
Albrectsen BR, Guiterrez L, Fritz RS, Fritz RD, Orians CM
Does the differential seedling mortality caused by slugs alter the foliar traits and subsequent susceptibility of hybrid willows to a generalist herbivore?
Ecological Entomology: 2007 32:211-220
Fritz RS, Hochwender CG, Albrectsen BR, Czesak ME
Fitness and genetic architecture of parent and hybrid willows in common gardens
Evolution: 2006 60:1215-1227
Albrectsen BR, Jansson S
From micro towards the macro scale
New Phytologist: 2006 172:7-10
Albrectsen BR, Gardfjell H, Orians CM, Murray B, Fritz RS
Slugs, willow seedlings and nutrient fertilization: intrinsic vigor inversely affects palatability
Oikos: 2004 105:268-278
Gowda JH, Albrectsen BR, Ball JP, Sjoberg M, Palo RT
Spines as a mechanical defence: the effects of fertiliser treatment on juvenile Acacia tortilis plants
Acta Oecologica-International Journal of Ecology: 2003 24:1-4
Albrectsen B, Nachman G
Female-biased density-dependent dispersal of a tephritid fly in a fragmented habitat and its implications for population regulation
Oikos: 2001 94:263-272
Flowering phenology and seed predation by a tephritid fly: Escape of seeds in time and space
Ecoscience: 2000 7:433-438
Sjoberg M, Albrectsen B, Hjalten J
Truncated power laws: a tool for understanding aggregation patterns in animals?
Ecology Letters: 2000 3:90-94