Elevated CO2 increases carbon allocation to the roots of Lolium perenne under free‐air CO2 enrichment but not in a controlled environment

Suter, D.; Frehner, Monika; Fischer, Bernt; Nösberger, J.; Luescher, Andreas

doi:10.1046/j.1469-8137.2002.00368.x

Cited by 80 publications

(61 citation statements)

References 56 publications

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“…Specifically, a tradeoff exists between producing aboveground structures for light capture and belowground structures for soil resource capture (Tilman and Wedin 1991;Craine 2009). Such patterns have been reported in ecosystems as diverse as grasslands (Suter et al 2002) and forests (Pregitzer et al 1995), and they tend to vary predictably across species according to photosynthetic functional group (Reynolds and Dantonio 1996).…”

Section: Introductionmentioning

confidence: 60%

C3 and C4 Biomass Allocation Responses to Elevated CO2 and Nitrogen: Contrasting Resource Capture Strategies

White

Langley

Cahoon

et al. 2012

Estuaries and Coasts

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Plants alter biomass allocation to optimize resource capture. Plant strategy for resource capture may have important implications in intertidal marshes, where soil nitrogen (N) levels and atmospheric carbon dioxide (CO 2 ) are changing. We conducted a factorial manipulation of atmospheric CO 2 (ambient and ambient+340 ppm) and soil N (ambient and ambient+25 gm −2 year −1 ) in an intertidal marsh composed of common North Atlantic C 3 and C 4 species. Estimation of C 3 stem turnover was used to adjust aboveground C 3 productivity, and fine root productivity was partitioned into C 3 -C 4 functional groups by isotopic analysis. The results suggest that the plants follow resource capture theory. The C 3 species increased aboveground productivity under the added N and elevated CO 2 treatment (P< 0.0001), but did not under either added N or elevated CO 2 alone. C 3 fine root production decreased with added N (P< 0.0001), but fine roots increased under elevated CO 2 (P0 0.0481). The C 4 species increased growth under high N availability both above-and belowground, but that stimulation was diminished under elevated CO 2 . The results suggest that the marsh vegetation allocates biomass according to resource capture at the individual plant level rather than for optimal ecosystem viability in regards to biomass influence over the processes that maintain soil surface elevation in equilibrium with sea level.

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Section: Introductionmentioning

confidence: 60%

C3 and C4 Biomass Allocation Responses to Elevated CO2 and Nitrogen: Contrasting Resource Capture Strategies

White

Langley

Cahoon

et al. 2012

Estuaries and Coasts

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“…Root respiration and rhizodeposition (consisting mostly of low molecular weight organic carbon compounds, Darrah, 1996) increased under elevated pCO 2 for L. perenne (Suter et al, 2002). Oxygen limitation as well as an increased availability in organic carbon can be expected to occur near the roots and under elevated pCO 2 .…”

Section: Rhizosphere Environment Under Elevated Pco 2 Altered Pseudommentioning

confidence: 98%

“…For example, the rate of net photosynthesis and C allocation to roots (Suter et al, 2002) are enhanced under elevated pCO 2 . A significant part of this C is released by plants roots (rhizodeposition) into the rhizosphere, the region of soil in close proximity and under the influence of living plant roots (Lynch and Whipps, 1990).…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, plants modify their surrounding soil and play a major role in regulating the rhizosphere microflora (Lynch and Whipps, 1990;Lemanceau et al, 1995;Paterson, 2003). Under elevated pCO 2 , the C flow into the soil increases (Darrah, 1996;Suter et al, 2002), and its composition may be altered (Hodge et al, 1998). This might stimulate the growth and activities of soil microbiota feeding on plantderived C sources (Weihong et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

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Phenotypic structure of Pseudomonas populations is altered under elevated pCO2 in the rhizosphere of perennial grasses

Tarnawski

Hamelin

Jossi

et al. 2006

Soil Biology and Biochemistry

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The increasing atmospheric CO 2 content (pCO 2 ) is likely to modify the ecosystem functioning including rhizosphere bacteria that are directly dependent on rhizodeposition. This may include alteration of Pseudomonas populations that display phenotypic traits in relation with plant fitness. In the present study, 1228 Pseudomonas strains were isolated from the non-rhizosphere soil, rhizosphere soil and root fractions of perennial grassland systems: Lolium perenne and Molinia coerulea. Both plants were grown under ambient (36 Pa) and elevated (60 Pa) pCO 2 in the Swiss Free Air CO 2 Enrichment (FACE) system. Pseudomonas spp. were tested for their ability to produce auxin, siderophores and hydrogen cyanide, and to dissimilate nitrate. No effect of root proximity and elevated pCO 2 was observed on the proportions of auxin producers. For L. perenne and M. coerulea, siderophore and hydrogen cyanide Pseudomonas producers were stimulated in the root fraction. In contrast lower frequencies of nitrate reducers were observed in the root fraction compared to non-rhizosphere soil. The frequencies of siderophore producers and nitrate dissimilating strains were higher, and those of hydrogen cyanide producers lower, under elevated pCO 2 for L. perenne. This alteration of the phenotypic structure of Pseudomonas guild in the root fraction is discussed in relation with the physico-biochemical modifications of the rhizosphere condition via rhizodeposition and environmental changes occurring under elevated pCO 2 .

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“…Es de resaltar, que la principal vía de respuesta en los organismos vegetales al exceso de CO2, es el incremento en el metabolismo fotosintético, que induce diferentes respuestas fisiológicas y bioquímicas, como el incremento de la biomasa vegetal o generación de mayor concentración de exudados tri o dicarboxílicos a través de las raíces como una vía de detoxificación por exceso de compuestos carbonados. [2][3][4] Entre los ácidos dicarboxílicos secretados por las plantas y de mayor trascendencia, se encuentra el ácido oxálico, el cual se acumula en las plantas como producto final del metabolismo del ciclo de Calvin. Este proceso se da en células vegetales especializadas denominadas glomeroblastos que participan en la síntesis, transporte y transformación del ácido distribuyéndolo en diferentes tejidos vegetales o liberándolo por el sistema radicular después de su respectiva transformación a sal de oxalato de sodio, u oxalato de calcio.5-7.…”

Section: Introductionunclassified

Degradación de oxalato por bacterias oxalotróficas asociadas a plantas del género Oxalis sp en regiones Andinas del departamento de Nariño, Colombia

et al. 2016

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Degradación de oxalato por bacterias oxalotróficas asociadas a plantas del géneroOxalis sp en regiones Andinas del departamento de Nariño, ColombiaOxalate degradation by oxalotrophic bacteria associated with plants of the genus Oxalis sp in the Andean region of the department of Nariño, Colombia ResumenIntroducción: El ácido oxálico (H 2 C 2 O 4 ) y las sales de oxalato son sustancias altamente oxidadas y consideradas tóxicas para algunos sistemas biológicos, incluido el humano, no obstante, pueden ser utilizadas como fuente de carbono y energía por algunas comunidades bacterianas, denominadas oxalotróficas, las cuales por su capacidad metabólica forman parte de la ruta biogeoquímica oxalato-carbonato (OCP, oxalate-carbonate pathway). Objetivo: Aislar y caracterizar bacterias oxalotróficas a partir de plantas del género Oxalis sp., de zonas alto-andina de Nariño-Colombia. Materiales y métodos: Se recolectaron muestras de suelo rizosférico de plantas oxalogénicas que fueron analizadas con parámetros fisicoquímicos y se utilizó un medio selectivo Schlegel para el aislamiento de bacterias oxalotróficas. Resultados: Las bacterias aisladas en medio selectivo Schlegel fueron caracterizadas bioquímicamente como: (Serratia fonticola, Bacillus amyloliquefaciens, Bacillus subtilis, Bacillus vallismortis y Bacillus cereus). Estas especies fueron capaces de degradar oxalato e incrementar el pH producto de la degradación. Conclusión: Este tipo de bacterias pueden ser estudiadas en trabajos complementarios para evaluar su potencial como biofertilizantes y/o alternativas de bioremediación en suelos ácidos. El estudio a pesar de ser indicativo a nivel biológico, puede en un futuro y con base en mayores soportes en investigación, tornarse en una promisoria aplicación para reducir el oxalato de calcio en los alimentos de consumo diario que presentan un renglón de importancia agrícola en la región, potencialmente dañinos para la función renal. Universidad y Salud[70] AbstractIntroduction: Oxalic acid (H2C2O4) and oxalate salts are highly oxidized substances, which are considered as toxic for some biological systems, including the human being; however, they can be used as a source of carbon and energy for some bacterial communities called oxalotrophic which are part of the so called oxalate-carbonate geochemistry pathway (OCP) due to its metabolic capacity. Objective: The aim of this research was to isolate and characterize oxalotrophic bacteria from plants of the genus Oxalis sp. in the high-andean zone of the department of Nariño, Colombia. Materials and methods: Samples of rhizosphere soil from oxalogenic plants were analyzed with physicochemical parameters and a Schlegel selective medium was used to isolate oxalotrophic bacteria. Results: The isolated bacteria through Schlegel selective medium were identified biochemically as: (Serratia fonticola, Bacillus amyloliquefaciens, Bacillus subtilis, Bacillus vallismortis and Bacillus cereus). The identified species play an important role in the rhizosphere soil, principally for the ...

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Elevated CO₂ increases carbon allocation to the roots of Lolium perenne under free‐air CO₂ enrichment but not in a controlled environment

Cited by 80 publications

References 56 publications

C3 and C4 Biomass Allocation Responses to Elevated CO2 and Nitrogen: Contrasting Resource Capture Strategies

C3 and C4 Biomass Allocation Responses to Elevated CO2 and Nitrogen: Contrasting Resource Capture Strategies

Phenotypic structure of Pseudomonas populations is altered under elevated pCO2 in the rhizosphere of perennial grasses

Degradación de oxalato por bacterias oxalotróficas asociadas a plantas del género Oxalis sp en regiones Andinas del departamento de Nariño, Colombia

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