Ostonen, I; Truu, M; Helmisaari, H-S; Lukac, M; Borken, W; Vanguelova, E; Godbold, DL; Lohmus, K; Zang, U; Tedersoo, L; Preem, J-K; Rosenvald, K; Aosaar, J; Armolaitis, K; Frey, J; Kabral, N; Kukumägi, M; Leppälammi-Kujansuu, J; Lindroos, A-J; Merilä, P; Napa, Ü; Nöjd, P; Parts, K; Uri, V; Varik, M; Truu, J: Adaptive root foraging strategies along a boreal-temperate 1 forest gradient, New Phytologist, 215, 977-991 (2017), doi:10.1111/nph.14643
Abstract:
• Tree root-mycorhizosphere plays a key role in resource uptake, but also in adaptation of forests to changing environments.

• Adaptive foraging mechanisms of ectomycorrhizal (EcM) and fine roots of Picea abies, Pinus sylvestris and Betula pendula were evaluated along a gradient from temperate to subarctic boreal forest (38 sites between latitudes 48°N and 69°N) in Europe. Variables 41 describing tree resource uptake structures and processes (absorptive fine root biomass and morphology, N concentration in absorptive roots, extramatrical mycelium (EMM) biomass, community structure of root-associated EcM fungi, soil and rhizosphere bacteria) were used to analyse relationships between root system functional traits and climate, soil and stand characteristics.

• Absorptive fine root biomass per stand basal area increased significantly from temperate to boreal forests, coinciding with longer and thinner root tips with higher tissue density, smaller EMM biomass per root length and with a shift in soil microbial community structure. Soil C:N ratio was found to explain most of the variability in absorptive fine root and EMM biomass, root tissue density, N concentration, and rhizosphere bacterial community structure.

• We suggest a concept of absorptive fine root foraging strategies involving both qualitative and quantitative changes in the root-mycorrhiza-bacteria continuum along climate and soil C:N gradients.

Upcoming ...

BayCEER Colloquium:
Th. 2017-10-26
Electrical imaging of subsurface nano- and micro-scale particle injections for in situ groundwater remediation
Ökologisch-Botanischer Garten:
Th. 2017-10-26
Blumen.Berge.Erlebtes: Finissage
Su. 2017-11-05
Eiserne Reserve: Pflanzen mit Wintersteher-Früchten
Su. 2017-11-05
Leibniz, die Welt und wir - Malerei, Lithografie, Installation
Su. 2017-11-12
Unwiderstehlich: BlütendüftVortrag: Wild- und Nutzpflanzen
Weather research site
Luftdruck (356m): 973.6 hPa
Lufttemperatur: 7.0 °C
Niederschlag: 0.0 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 17m): 5.6 km/h
Wind (Max.): 9.4 km/h
Windrichtung: SO

...more
Globalstrahlung: 19 W/m²
Lufttemperatur: 7.1 °C
Niederschlag: 0.1 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 32m): 8.0 km/h
Wind (Max.): 25.1 km/h

...more