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 ...
Ökologisch-Botanischer Garten:
Sa. 2018-07-21
UNIKAT - Das Sommer- und Tanzevent der Universität im Ökologisch-Botanischen Garten, Tickets unter: www.unikat.uni-bayreuth.de
Su. 2018-07-22
Literatur und Musik: Serenade am Victoria-Becken
We. 2018-07-25
Vom Korn zum Brot: Öffentliche Brotprüfung der Bäckerinnung Bayreuth Stadt und Land
We. 2018-07-25
Unser täglich Brot: Getreide und Pseudocerealien
Su. 2018-08-05
Heitere Botanik: Pflanzen in Versen von K.H. Waggerl
Weather research site
Luftdruck (356m): 971.2 hPa
Lufttemperatur: 16.0 °C
Niederschlag: 3.2 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 17m): 4.5 km/h
Wind (Max.): 8.3 km/h
Windrichtung: SO

...more
Globalstrahlung: 258 W/m²
Lufttemperatur: 17.8 °C
Niederschlag: 0.1 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 32m): 5.4 km/h
Wind (Max.): 10.9 km/h

...more
This site makes use of cookies More information