Decomposition rate of extraradical hyphae of arbuscular mycorrhizal fungi decreases rapidly over time and varies by hyphal diameter and season
Decomposition rate of extraradical hyphae of arbuscular mycorrhizal fungi decreases rapidly over time and varies by hyphal diameter and season
复制标题
丛枝菌根真菌根外菌丝的分解率随着时间的推移迅速降低,并随菌丝直径和季节的变化而变化
DOI:
10.1016/j.soilbio.2019.107533
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发表时间:
2019
影响因子:
9.7
通讯作者:
Osawa Akira
中科院分区:
文献类型:
--
作者:
Sch?fer Holger;Dannoura Masako;Ataka Mioko;Osawa Akira
Understanding how extraradical mycorrhizal fungal hyphae (EMH) regulate the cycling and retention of plant-assimilated carbon (C) in forest soils requires estimation of the production, mortality, and decomposition of EMH. To do this, the use of mass-balance models in combination with hyphal in-growth mesh bags (“in-growth bags”) was proposed in recent studies. However, poor knowledge on the decomposition of field-grown EMH prevents confirmation of assumed EMH decomposition dynamics. In this study, we determined the decrease in hyphal length density of field-grown EMH of arbuscular mycorrhizal fungi (AM) over eight months in in-growth bags incubated in a warm-temperateChamaecyparisobtusaforest, to study EMH decomposition under field conditions. We used exponential decay models to describe the changes in the decomposition rate of EMH over the incubation time, between EMH diameter classes, and between seasons. A rapid decrease of the decomposition rate of EMH within two months from 2.5 to 0.1 month−1was estimated, corresponding to an increase in half-life from 0.3 to 7 months. Furthermore, significant differences in the initial maximum decomposition rate were estimated between fine (1.6 month−1; minimum half-life: 0.4 months) and coarse EMH (3.1 month−1; minimum half-life: 0.2 months) and between incubations during spring-summer (April and August; 2.7 month−1; minimum half-life: 0.3 months) and autumn-winter (October and February; 1.1 month−1; minimum half-life: 0.6 months). This large variability in the decomposition rates of EMH of AM fungi has to be considered in mass-balance models to estimate C fluxes between plants, soil, and the atmosphere.
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影响因子:
2.1
作者:
E. Ezcurra;J. Becerra
通讯作者:
J. Becerra
影响因子:
4.9
作者:
Osawa, Akira;Aizawa, Ryota
通讯作者:
Aizawa, Ryota
影响因子:
5.5
作者:
MINDERMA.G
通讯作者:
MINDERMA.G
影响因子:
9.7
作者:
Xuefeng Li;J. King
通讯作者:
J. King
DOI:
--
发表时间:
2008
期刊:
Ecological Research (in press)
影响因子:
--
作者:
Yoshiyuki;Inagaki;et. al.
通讯作者:
et. al.