Carbon transfer from maize roots and litter into bacteria and fungi depends on soil depth and time

Müller, Karolin; Krämer, Susanne; Haslwimmer, Heike; Marhan, Sven; Scheunemann, Nicole; Butenschön, Olaf; Scheu, Stefan; Kandeler, Ellen

doi:10.1016/j.soilbio.2015.10.015

Cited by 74 publications

(35 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Phospholipid-derived fatty acids were extracted from 2.0 g soil following the procedure described by Frostegård, Tunlid, and Bååth Kramer, Marhan, Haslwimmer, Ruess, and Kandeler (2013). For determination of the 13 C signature in FAMEs, an HP 6890 Gas Chromatograph (Agilent Inc.) coupled via a combustion III Interface (Thermo Finnigan) with a Delta Plus XP mass spectrometer (Thermo Finnigan MAT) was used according to the procedure described by Müller et al (2016). In total, 30 PLFA peaks were detected with gas chromatography -flame ionization detector, but during gas chromatography combustion isotope ratio mass spectrometry analyses not all peaks were baseline separated because of either low concentration or weak separation of single fatty acids.…”

Section: Phospholipid-derived Fatty Acidsmentioning

confidence: 99%

Dark microbial CO₂ fixation in temperate forest soils increases with CO₂ concentration

Spohn

Müller

Höschen

et al. 2019

Global Change Biology

Self Cite

View full text Add to dashboard Cite

Dark, that is, nonphototrophic, microbial CO2 fixation occurs in a large range of soils. However, it is still not known whether dark microbial CO2 fixation substantially contributes to the C balance of soils and what factors control this process. Therefore, the objective of this study was to quantitate dark microbial CO2 fixation in temperate forest soils, to determine the relationship between the soil CO2 concentration and dark microbial CO2 fixation, and to estimate the relative contribution of different microbial groups to dark CO2 fixation. For this purpose, we conducted a 13C‐CO2 labeling experiment. We found that the rates of dark microbial CO2 fixation were positively correlated with the CO2 concentration in all soils. Dark microbial CO2 fixation amounted to up to 320 µg C kg−1 soil day−1 in the Ah horizon. The fixation rates were 2.8–8.9 times higher in the Ah horizon than in the Bw1 horizon. Although the rates of dark microbial fixation were small compared to the respiration rate (1.2%–3.9% of the respiration rate), our findings suggest that organic matter formed by microorganisms from CO2 contributes to the soil organic matter pool, especially given that microbial detritus is more stable in soil than plant detritus. Phospholipid fatty acid analyses indicated that CO2 was mostly fixed by gram‐positive bacteria, and not by fungi. In conclusion, our study shows that the dark microbial CO2 fixation rate in temperate forest soils increases in periods of high CO2 concentrations, that dark microbial CO2 fixation is mostly accomplished by gram‐positive bacteria, and that dark microbial CO2 fixation contributes to the formation of soil organic matter.

show abstract

Section: Phospholipid-derived Fatty Acidsmentioning

confidence: 99%

Dark microbial CO₂ fixation in temperate forest soils increases with CO₂ concentration

Spohn

Müller

Höschen

et al. 2019

Global Change Biology

Self Cite

View full text Add to dashboard Cite

show abstract

“…Similarly, rhizosphere decomposer soil food webs tend to be dominated by the bacterial energy channel (Thakur & Eisenhauer ; Muller et al . ), which typically has lower diversity than the fungal energy channel (De Vries et al . , ).…”

Section: Rhizosphere Network Are Recruited From Bulk Soil Networkmentioning

confidence: 99%

“…Moreover, rhizosphere networks grew larger and gained more connections and hubs during plant growth, while networks in the bulk soil remained relatively static. Similarly, rhizosphere decomposer soil food webs tend to be dominated by the bacterial energy channel (Thakur & Eisenhauer 2015;Muller et al 2016), which typically has lower diversity than the fungal energy channel (De Vries et al 2012a. These patterns likely occur because the high-resource rhizosphere 'recruits' a subset of species from the bulk soil community.…”

Section: Rhizosphere Network Are Recruited From Bulk Soil Networkmentioning

confidence: 99%

Below‐ground connections underlying above‐ground food production: a framework for optimising ecological connections in the rhizosphere

2017

View full text Add to dashboard Cite

Summary1. Healthy soils that contain an active microbiome and food web are critical to sustainably produce food for a growing global human population. Many studies have focussed on the role of microbial species diversity and the presence of key functional groups as important controls on the many functions that a sustainable food system relies on. 2. Here, we synthesise recent ecological empirical evidence and theory to propose that the interactions between organisms in the soil food web are the critical determinant of soil function. 3. We propose the Rhizosphere Interactions for Sustainable Agriculture Model, in which crop roots recruit small, modular, highly connected soil rhizosphere networks from large, static, relatively unconnected and diverse bulk soil networks. We argue that conventional agricultural management disrupts the connections between rhizosphere and bulk soil networks. 4. Synthesis. We identify future research directions for optimising ecological connections between roots and rhizosphere microbial and faunal networks, and between rhizosphere networks and bulk soil networks in agricultural production systems. Knowledge on these connections can be applied in agricultural systems to sustainability produce food for a growing global population.

show abstract

“…However, the microorganisms actively responsive during straw decomposition are not necessarily the utilizers of straw‐derived nutrients which also might be stimulated by the altered ecological niche resulting from extra C (Lee et al., ). Further research is required to precisely identify the populations that assimilate straw‐derived C from the diverse microbial community (Glissmann, Weber, & Conrad, ; Müller et al., ).…”

Section: Introductionmentioning

confidence: 99%

Analysis of microbial utilization of rice straw in paddy soil using a DNA‐SIP approach

Guo¹,

Zhang

Ai³

et al. 2020

Soil Science Soc of Amer J

View full text Add to dashboard Cite

Considering the close connection between soil microorganisms with carbon (C) cycling, the aim of this study was to identify the specific bacterial and fungal microbes that assimilate 13C from incorporated rice straw and explore their dynamics and characteristics during straw decomposition in paddy soil. Soil microcosms based on 12/13C‐labeled rice straw were incubated with the determination of CO2 production at 1, 3, 7, 14, 28, 56 and 90 days after straw incorporation. Meanwhile, the targeted soil bacterial and fungal communities were characterized using a DNA‐based stable isotope probing (DNA‐SIP) approach combined with Illumina MiSeq sequencing. Rice straw decomposed rapidly in the first 2 weeks, coupled with a large turnover of soil native organic matter. During this process, Actinobacteria including the orders Streptomycetales, Caternulisporales and Corynebacteriales dominated the community utilizing rice straw‐derived C with a succession from Streptomyces, to Kitasatospora, to Catenulispora. At Days 56 to 90, the dominant orders assimilating rice straw‐derived 13C were Micrococcales, Sphingobacteriia, Gammaproteobacteria from phyla Actinobacteria, Bacteroidetes and Proteobacteria, respectively. The fungal orders Onygenales, Capnodiales, Sordariales and Pleosporales showed stronger ability of 13C utilization at late decomposition stage. Taken together, along with stimulation of soil organic matter mineralization after rice straw addition, dynamics of 13C‐assimilating bacterial and fungal groups with various characteristics were identified.

show abstract

Carbon transfer from maize roots and litter into bacteria and fungi depends on soil depth and time

Cited by 74 publications

References 52 publications

Dark microbial CO₂ fixation in temperate forest soils increases with CO₂ concentration

Dark microbial CO₂ fixation in temperate forest soils increases with CO₂ concentration

Below‐ground connections underlying above‐ground food production: a framework for optimising ecological connections in the rhizosphere

Analysis of microbial utilization of rice straw in paddy soil using a DNA‐SIP approach

Contact Info

Product

Resources

About

Carbon transfer from maize roots and litter into bacteria and fungi depends on soil depth and time

Cited by 74 publications

References 52 publications

Dark microbial CO2 fixation in temperate forest soils increases with CO2 concentration

Dark microbial CO2 fixation in temperate forest soils increases with CO2 concentration

Below‐ground connections underlying above‐ground food production: a framework for optimising ecological connections in the rhizosphere

Analysis of microbial utilization of rice straw in paddy soil using a DNA‐SIP approach

Contact Info

Product

Resources

About

Dark microbial CO₂ fixation in temperate forest soils increases with CO₂ concentration

Dark microbial CO₂ fixation in temperate forest soils increases with CO₂ concentration