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.

Aktuelle Termine


BayCEER-Kolloquium:
Mo. 25.06.2018
Öffentliche Vorträge im Rahmen der Besetzung der Professur "Sportökologie"
Do. 28.06.2018
From the field to the lab to integrated risk assessment of vector-borne pathogens
Ökologisch-Botanischer Garten:
Mi. 27.06.2018
Harmlos bis tödlich: Krankheiten der Bäume
So. 01.07.2018
Arzneipflanzen im Wandel der Zeit
Workshop:
Mi. 27.06.2018
GFBio Roadshow – Research Data Management for scientists, step by step (German Federation for Biological Data)
Wetter Versuchsflächen
Luftdruck (356m): 980.2 hPa
Lufttemperatur: 8.4 °C
Niederschlag: 0.0 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 17m): 6.0 km/h
Wind (Max.): 9.7 km/h
Windrichtung: W

...mehr
Globalstrahlung: 2 W/m²
Lufttemperatur: 6.8 °C
Niederschlag: 0.0 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 32m): 8.2 km/h
Wind (Max.): 19.5 km/h

...mehr
Diese Webseite verwendet Cookies. weitere Informationen