Elevation of atmospheric CO2 and N-nutritional status modify nodulation, nodule-carbon supply, and root exudation of Phaseolus vulgaris L.

Haase, Susan; Neumann, Günter; Kania, A.; Kuzyakov, Yakov; Römheld, Volker; Kandeler, Ellen

doi:10.1016/j.soilbio.2007.03.014

Cited by 141 publications

(94 citation statements)

References 43 publications

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“…This hypothesis fits with the reduced Nnutritional status of plants growing under elevated CO 2 concentration as found by several authors (Diaz et al 1993;Haase et al 2007b) due also to the usually low C/N ratio of the microbial biomass.…”

Section: Climate Change Effect On Root Flavonoids and Its Ecological supporting

confidence: 90%

“…The major flavonoids in the root exudates of Glycine max L. and Phaseolus vulgaris L. are nod-gene inducers involved in signal exchange during the establishment of the rhizobium symbiosis (genistein, daidzein, isoliquiritigenin) and the allelopathic and antimicrobial compound coumestrol (Bolanos-Vasquez and Werner 1997; Dakora and Phillips 1996;Rao 1990). Accordingly, the nod-gene inducers are mainly released in the apical root zones thus labelling the infection sites for Rhizobia, while the protective compound coumestrol is released over the whole root system (Haase et al 2007a;Kape et al 1992;Neumann 2006; Fig. 4).…”

Section: Direct Effectsmentioning

confidence: 99%

“…Concerning the possible ecological effect of this extra C-input on soil-plant relationships, it has been suggested that the increase of flavonoid root exudation under elevated CO 2 may stimulate microbial growth and activity in the rhizosphere, which in turn could increase the competition between plant and microbes for nutrient uptake and immobilization (Haase et al 2007a). This hypothesis fits with the reduced Nnutritional status of plants growing under elevated CO 2 concentration as found by several authors (Diaz et al 1993;Haase et al 2007b) due also to the usually low C/N ratio of the microbial biomass.…”

Section: Climate Change Effect On Root Flavonoids and Its Ecological mentioning

confidence: 99%

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Plant-borne flavonoids released into the rhizosphere: impact on soil bio-activities related to plant nutrition. A review

et al. 2012

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Plants produce and release in the surrounding soil, the so-called rhizosphere, a vast variety of secondary metabolites. Among them, flavonoids are the most studied, mainly for their role in the establishment of rhizobiumlegume symbiosis; on the other hand, some studies highlight that they are also important in the plant strategies to acquire nutrients from the soil, for example, by acting on its chemistry. The scope of this review is to give a quick overview on the types and amounts of plant-released flavonoids in order to focus on their effects on soil activities that in turn can influence nutrient availability and so plant mineral nutrition; emphasis is given to the different nutrient cycles, soil enzyme, and soil bacteria activities, and their influence on soil macrofauna and roots of other plants. Finally, the possible outcome of the climate change on these processes is discussed.

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Section: Climate Change Effect On Root Flavonoids and Its Ecological supporting

confidence: 90%

Section: Direct Effectsmentioning

confidence: 99%

Section: Climate Change Effect On Root Flavonoids and Its Ecological mentioning

confidence: 99%

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Plant-borne flavonoids released into the rhizosphere: impact on soil bio-activities related to plant nutrition. A review

et al. 2012

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“…2D-imaging in rhizoboxes has been applied to study release of carbon or specific organic compounds by 14 C application and/or chemical analyses of spatial resolved collected exudates with HPLC, HPLC-MS, capillary electrophoreses or GC-MS (Dessureault-Rompré et al 2006;Haase et al 2007;Neumann et al 2009). Enzyme activity (acid phosphatase) was imaged based on dyeimpregnated filter paper as early as 1992 by Dinkelaker and Marschner (1992).…”

Section: Brief Review Of Chemical Mappingmentioning

confidence: 99%

Challenges in imaging and predictive modeling of rhizosphere processes

et al. 2016

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Background Plant-soil interaction is central to human food production and ecosystem function. Thus, it is essential to not only understand, but also to develop predictive mathematical models which can be used to assess how climate and soil management practices will affect these interactions. Scope In this paper we review the current developments in structural and chemical imaging of rhizosphere processes within the context of multiscale mathematical image based modeling. We outline areas that need more research and areas which would benefit from more detailed understanding. Conclusions We conclude that the combination of structural and chemical imaging with modeling is an incredibly powerful tool which is fundamental for understanding how plant roots interact with soil. We emphasize the need for more researchers to be attracted to this area that is so fertile for future discoveries. Finally, model building must go hand in hand with experiments. In particular, there is a real need to integrate rhizosphere structural and chemical imaging with modeling for better understanding of the rhizosphere processes leading to models which explicitly account for pore scale processes.

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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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Elevation of atmospheric CO2 and N-nutritional status modify nodulation, nodule-carbon supply, and root exudation of Phaseolus vulgaris L.

Cited by 141 publications

References 43 publications

Plant-borne flavonoids released into the rhizosphere: impact on soil bio-activities related to plant nutrition. A review

Plant-borne flavonoids released into the rhizosphere: impact on soil bio-activities related to plant nutrition. A review

Challenges in imaging and predictive modeling of rhizosphere processes

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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