What benefits of Laccaria bicolor have been cited in the scientific literature?
Laccaria bicolor — also cataloged as Laccaria laccata var. bicolor Maire and Laccaria proxima var. bicolor — is an ectomycorrhizal (ECM) fungus reported in peer-reviewed research to form mutualistic symbioses with host trees including Populus trichocarpa, Populus x canescens, and Pinus massoniana. The indexed literature for this input under the Potential Claims lens cites 8 benefits tied to ECM colonization.
For biocontrol integration, Trichoderma spp. have been reported to respond non-aggressively toward L. bicolor, distinguishing it from plant-pathogenic fungi at a distance — a compatibility factor the literature notes for Trichoderma-based programs in tree plantation settings.
1AAPFCO-accepted claims
Listing details- Beneficial to plants and/or soils.
Accepted wording, shown verbatim · source: AAPFCO Plant Biostimulant list
2Potential claims from the literature
Reported to form ectomycorrhizal (ECM) associations with host tree roots, including Populus trichocarpa, Populus x canescens, and Pinus massoniana, establishing a mutualistic symbiosis that can improve plant health and productivity
Reported to mobilize inorganic phosphate (IP) in rhizosphere soil of Pinus massoniana seedlings grown in acidic field conditions, improving phosphorus bioavailability including Al-bound P, Ca-bound P, and occluded P
Reported to induce expression of phosphatases, ribonucleases, and phosphate transport genes under phosphate-deficient conditions, with increased enzymatic activities associated with Pi mobilization from organic sources
Reported to enhance plant aluminum (Al) tolerance in the field by mobilizing inorganic phosphate to improve P bioavailability in acidic soil
Reported to cause metabolic adjustments in mycorrhized poplar (Populus x canescens), including alterations in lipid composition, peptide abundance, and phenolic compound levels, affecting the whole-plant metabolome and potentially influencing aboveground plant interactions
Reported to result in growth inhibition in young poplars under both high and low phosphorus supply conditions, with Laccaria bicolor-colonized plants showing lower growth and biomass production compared to plants colonized with Paxillus involutus or non-inoculated controls
Reported to produce terpene synthase (TPS) enzymes whose phylogenetic analysis and functional characterization were investigated in the context of secondary metabolite production during symbiosis establishment
Reported to be distinguished from plant-pathogenic fungi by Trichoderma spp. at a distance, with Trichoderma showing contrary (non-aggressive) growth responses toward L. bicolor compared to phytopathogens, suggesting compatibility with Trichoderma-based biocontrol applications in tree plantations
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