10.5061/DRYAD.0M9N57K
Liese, Rebecca
University of Göttingen
Leuschner, Christoph
University of Göttingen
Meier, Ina Christin
University of Göttingen
Data from: The effect of drought and season on root life span in temperate
arbuscular mycorrhizal and ectomycorrhizal tree species
Dryad
dataset
2019
Ectomycorrhiza
deciduous tree species
plant-soil (below-ground) interactions
root morphology
Season
mini-rhizotrons
arbuscular mycorrhiza
2019-05-10T14:42:00Z
2019-05-10T14:42:00Z
en
https://doi.org/10.1111/1365-2745.13181
283438 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
1. Fine roots play a key role in carbon (C) and nutrient cycling, since
fine root lifespan drives soil organic C input and, thus, N availability.
The two principal fungal symbioses found in temperate forest trees,
ectomycorrhizae (ECM) and arbuscular mycorrhizae (AM), induce different
root morphological changes upon infection, but the consequences for root
lifespan are not clear. 2. We explored differences in fine root lifespan
between four AM and four ECM tree species using mini-rhizotrons in a
factorial drought experiment in large mesocosms. 3. Median root lifespan
of young AM and ECM trees differed fundamentally in its response to soil
moisture and season of root birth: ECM root lifespan was reduced from 176
to 81 d in dry soil compared to moist soil, independent of season. By
contrast, AM root lifespan was less responsive to drought, but decreased
from 185 to 127 d when comparing roots produced early in the growing
season vs. mid-season. In both mycorrhizal types, root lifespan was
positively related to root diameter and negatively to the portion of
lower-order roots. 4. Synthesis. While our results indicate morphological
and architectural traits that predict root lifespan across tree species,
they also indicate principal differences in the environmental response of
root lifespan in young AM and ECM trees. This knowledge helps to improve
global predictions of root lifespan.
Liese_etal_morphological_and_functional_traitsBelowground and aboveground
morphological and functional
traitsLiese_etal_lifespan_and_proportional_hazardsRoot lifespan and data
for the calculation of proportional hazards