Interaction among<i>Arachis hypogaea</i>L. (peanut) and beneficial soil microorganisms: how much is it known?

Fabra, Adriana; Castro, Stella; Taurian, Tania; Angelini, Jorge Guillermo; Ibáñez, Fernando; Dardanelli, Marta Susana; Tonelli, María Laura; Bianucci, Eliana; Valetti, Lucio

doi:10.3109/10408410903584863

Cited by 79 publications

(53 citation statements)

References 121 publications

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“…Bradyrhizobium sp. is a Gram negative soil bacterium with high agronomic significance since it is able to establish a symbiotic nitrogen-fixing association with peanut plant (Arachis hypogaea L.), contributing in this way with the soil fertility (Fabra et al 2010). Therefore, the aims of this work were to evaluate in Bradyrhizobium sp.…”

Section: Introductionmentioning

confidence: 98%

Involvement of glutathione and enzymatic defense system against cadmium toxicity in Bradyrhizobium sp. strains (peanut symbionts)

2011

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In this study, the effects of cadmium (Cd) on cell morphology and antioxidant enzyme activities as well as the distribution of the metal in different cell compartments in Bradyrhizobium sp. strains were investigated. These strains were previously classified as sensitive (Bradyrhizobium sp. SEMIA 6144) and tolerant (Bradyrhizobium sp. NLH25) to Cd. Transmission electron micrographs showed large electron-translucent inclusions in the sensitive strain and electron-dense bodies in the tolerant strain, when exposed to Cd. Analysis of Cd distribution revealed that it was mainly bounded to cell wall in both strains. Antioxidant enzyme activities were significantly different in each strain. Only the tolerant strain was able to maintain a glutathione/oxidized glutathione (GSH/GSSG) ratio by an increase of GSH reductase (GR) and GSH peroxidase (GPX) enzyme activities. GSH S-transferase (GST) and catalase (CAT) activities were drastically inhibited in both strains while superoxide dismutase (SOD) showed a significant decrease only in the sensitive strain. In conclusion, our findings suggest that GSH content and its related enzymes are involved in the Bradyrhizobium sp. tolerance to Cd contributing to the cellular redox balance.

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Section: Introductionmentioning

confidence: 98%

Involvement of glutathione and enzymatic defense system against cadmium toxicity in Bradyrhizobium sp. strains (peanut symbionts)

2011

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“…The bacterial populations in the root related environment contribute to plant health by mediating nutrient acquisition, by causing soil borne diseases or by controlling the growth or activity of plant pathogens [1], [2], [3]. The interactions between soil, bacteria and plants in the root related environment determine soil fertility and sustainability and plant quality [3], [4].…”

Section: Introductionmentioning

confidence: 99%

“…The interactions between soil, bacteria and plants in the root related environment determine soil fertility and sustainability and plant quality [3], [4]. The structural and functional diversity of soil bacterial communities are influenced by several biotic and abiotic factors, such as climate and season, soil type and structure, treatment or management of the soil, plant species and development stage [5], [6], [7], [8], [9], [10].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Succession of Soil Bacterial Community during Continuous Cropping of Peanut (Arachis hypogaea L.)

Chen¹,

Xiao²,

Yang³

et al. 2014

PLoS ONE

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Plant health and soil fertility are affected by plant–microbial interactions in soils. Peanut is an important oil crop worldwide and shows considerable adaptability, but growth and yield are negatively affected by continuous cropping. In this study, 16S rRNA gene clone library analyses were used to study the succession of soil bacterial communities under continuous peanut cultivation. Six libraries were constructed for peanut over three continuous cropping cycles and during its seedling and pod-maturing growth stages. Cluster analyses indicated that soil bacterial assemblages obtained from the same peanut cropping cycle were similar, regardless of growth period. The diversity of bacterial sequences identified in each growth stage library of the three peanut cropping cycles was high and these sequences were affiliated with 21 bacterial groups. Eight phyla: Acidobacteria, Actinobacteria, Bacteroidetes, Chloroflexi, Gemmatimonadetes, Planctomycetes, Proteobacteria and Verrucomicrobia were dominant. The related bacterial phylotypes dynamic changed during continuous cropping progress of peanut. This study demonstrated that the bacterial populations especially the beneficial populations were positively selected. The simplification of the beneficial microbial communities such as the phylotypes of Alteromonadales, Burkholderiales, Flavobacteriales, Pseudomonadales, Rhizobiales and Rhodospirillales could be important factors contributing to the decline in peanut yield under continuous cropping. The microbial phylotypes that did not successively changed with continuous cropping, such as populations related to Rhizobiales and Rhodospirillales, could potentially resist stress due to continuous cropping and deserve attention. In addition, some phylotypes, such as Acidobacteriales, Chromatiales and Gemmatimonadales, showed a contrary tendency, their abundance or diversity increased with continuous peanut cropping progress. Some bacterial phylotypes including Acidobacteriales, Burkholderiales, Bdellovibrionales, and so on, also were affected by plant age.

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“…Peanut is a legume with high N requirement, which may be obtained from the soil or from biological N fixation (BNF) (Fabra et al, 2010). The organic matter availability in soils of the peanut-growing region in Argentina is becoming low (Castro et al, 2006); therefore, there is great need to explore biological and sustainable means to improve soil quality.…”

Section: Introductionmentioning

confidence: 99%

Development and field evaluation of liquid inoculants with native <i>Bradyrhizobial</i> strains for peanut production

Valetti¹,

Angelini²,

Taurian³

et al. 2016

Afr. Crop Sci. J.

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A critical process in the leguminous crops cycles is biological nitrogen fixation (BNF). Application of inoculants with N fixing bacteria is economically and environmentally favourable. The aim of this work was to select competitive native peanut microsymbionts, evaluate their survival in inoculant support and assess their impact on peanut (Arachis hypogaea L.) production under field conditions at Córdoba province in Argentina. The efficient N fixing Bradyrhizobium sp. J-81 and Bradyrhizobium sp. J-237, previously obtained from peanut nodules in the region of Cordoba, Argentina, were evaluated. In microcosm assays, plants inoculated with these isolates demonstrated better symbiotic parameters than those inoculated with reference strains. Different bacterial growth media and inoculant stabiliser solutions were evaluated. Balanced medium and arabic gum stabilising solution had optimal bacterial growth and the highest bacterial concentration and viability, respectively. Inoculation with either inoculants resulted in 44% greater peanut pod yield at Pizarro compared to the non-inoculated plants, although no significant differences were found with respect to commercial inoculants treatments.Key Words: Arachis hypogaea, Argentina, biological nitrogen fixation RÉSUMÉ La fixation biologique de l'Azote (FBA) est un processus important dans le cycle de vie des légumineuses. L'application d'inoculum de bactéries fixatrices d'azote est favorable au double plan économique et environnemental. Le but de cette étude était de sélectionner des bactéries symbiotiques de l'arachide natives et compétitives, évaluer leur temps de survie dans support d'inoculum et évaluer leur impact sur la production en plein champ de l'arachide (Arachis hypogaea L.) dans la province de Córdoba en Argentine. Les bactéries fixatrices d'azote Bradyrhizobium sp. J-81 et Bradyrhizobium sp. J-237, extraites de nodules collectés sur des plants cultivés dans la région de Cordoba en Argentina, ont été évaluées. Dans des essais de microcosme, des plants inoculés avec ces isolats ont exhibés de meilleurs paramètres symbiotiques que les plants non inoculés. Différents média de culture bactérienne et supports inoculums ont été testés. Medium mixte et solution stabilisée à la gomme arabique ont respectivement exhibés la croissance optimale des bactéries et la meilleure conservation et viabilité des bactéries. L'application de n'importe quel inoculum produisit 44% plus de rendement en gousses d'arachides à Pizarro par rapport aux plantes non-inoculées, et ceci bien qu'aucune différence significative n'a été observée en comparaison avec les traitements à l'inoculum du commerce.

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Interaction amongArachis hypogaeaL. (peanut) and beneficial soil microorganisms: how much is it known?

Cited by 79 publications

References 121 publications

Involvement of glutathione and enzymatic defense system against cadmium toxicity in Bradyrhizobium sp. strains (peanut symbionts)

Involvement of glutathione and enzymatic defense system against cadmium toxicity in Bradyrhizobium sp. strains (peanut symbionts)

Dynamic Succession of Soil Bacterial Community during Continuous Cropping of Peanut (Arachis hypogaea L.)

Development and field evaluation of liquid inoculants with native <i>Bradyrhizobial</i> strains for peanut production

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