Activity of two catabolic enzymes of the phosphogluconate pathway in mesquite roots inoculated with Azospirillum brasilense Cd

Leyva, Luis A.; Bashan, Yoav

doi:10.1016/j.plaphy.2008.05.011

Cited by 12 publications

(8 citation statements)

References 33 publications

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“…Most cardon cacti initiate their life cycle as nurslings of mesquite (Carrillo‐Garcia et al, ). As demonstrated previously for B. pumilus ES4 (de‐Bashan, Hernandez, Bashan, & Maier, ) and for other bacteria (Leyva & Bashan, ), inoculation significantly increases the root biomass of mesquite, a plant known for developing an extensive root system but meager foliage at the beginning of its growth (Felker, ). Increased root biomass improves the chance of survival of the plant in an arid environment.…”

Section: Discussionsupporting

confidence: 67%

“…Other examples include India, where native trees inoculated with a consortium of PGPB performed well in degraded parkland soil (Ramachandran & Radhapriya, ), and China, where rock‐weathering bacteria supported plant growth (Wu, Zhang, & Guo, ). In the southern Sonoran Desert of Mexico and in Argentina, inoculation with the agricultural PGPB species A. brasilense significantly promoted the growth, establishment, and survival of several legume trees and cacti (Bacilio, Hernandez, & Bashan, ; Bashan, Rojas, & Puente, ; Bashan et al, ; Bashan, Salazar, & Puente, ; Bashan, Salazar, Puente, Bacilio, & Linderman, ; Carrillo, Li, & Bashan, ; Carrillo‐Gracia, Bashan, Diaz‐Rivera, & Bethlenfalvay, ; Felker, Medina, Soulier, & Velicce, ; Leyva & Bashan, ; Puente & Bashan, ). Other desert PGPB, both rhizospheric and endophytic, promoted the growth of cacti of varying sizes (Lopez, Tinoco‐Ojanguren, Bacilio, Mendoza, & Bashan, ; Puente, Li, & Bashan, , ).…”

Section: Introductionmentioning

confidence: 99%

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Root growth improvement of mesquite seedlings and bacterial rhizosphere and soil community changes are induced by inoculation with plant growth‐promoting bacteria and promote restoration of eroded desert soil

Galaviz¹,

Lopez²,

de‐Bashan

et al. 2018

Land Degrad Dev

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Soil degradation is an ecological disturbance, usually human‐caused, that negatively affects the vegetation and climate of an ecosystem, particularly arid and semiarid environments. These degraded soils can be restored by using native perennial plants inoculated with specific microorganisms. We studied the changes in root growth and the rhizosphere bacterial community of mesquite seedlings (Prosopis articulata) after inoculation with the endophytic bacteria Bacillus pumilus ES4, over 3 cycles of growth in the same soil under desert climatic conditions, and found that inoculation significantly enhanced root biomass during the growth cycles but not shoot biomass or root and shoot lengths. Fluorescent in situ hybridization analysis demonstrated that B. pumilus colonized the root cap, apical meristem, and elongation zone, forming small colonies, on roots from soil‐grown mesquite. Inoculation also significantly changed the bacterial community structure of rhizophere and nonrhizosphere (without plants) soils based on denaturing gradient gel electrophoresis profiles. The changes were highly stable, and the bacterial community structure was maintained throughout the experimental period and not affected by plant replacement. The 16S rRNA pyrosequencing confirmed the changes on structure of bacterial community and revealed an impact on the top taxonomic levels analyzed. The rhizospheres of inoculated plants showed a significant increase in the abundance of Proteobacteria and Acidobacteria coupled with a concomitant decrease in Actinobacteria, whereas an opposite response was observed in nonrhizospheric degraded soils. Overall, inoculation with B. pumilus reduced bacterial diversity but increased the Rhizobium population in the soil. The class Bacilli, despite B. pumilus inoculum, showed minimal variation.

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Section: Discussionsupporting

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Root growth improvement of mesquite seedlings and bacterial rhizosphere and soil community changes are induced by inoculation with plant growth‐promoting bacteria and promote restoration of eroded desert soil

Galaviz¹,

Lopez²,

de‐Bashan

et al. 2018

Land Degrad Dev

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“…The TYG medium has also been utilized by the authors as alternative to isolate representatives of the Azospirillum genus. It has been described that Cd is the only A. brasilense strain showing round, wrinkled, dry, and pink-colored colonies in this medium [23]. In this work, not only Cd strain but also Sp7, 40M and 42M strains showed typical colony morphology in this medium, while Az39 strain showed white-colored instead of pink-colored colonies.…”

Section: Discussionsupporting

confidence: 50%

Physiological and biochemical characterization ofAzospirillum brasilensestrains commonly used as plant growth-promoting rhizobacteria

Salvo

Silva

Teixeira

et al. 2014

J. Basic Microbiol.

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Azospirillum is a plant growth-promoting rhizobacteria (PGPR) genus vastly studied and utilized as agriculture inoculants. Isolation of new strains under different environmental conditions allows the access to the genetic diversity and improves the success of inoculation procedures. Historically, the isolation of this genus has been performed by the use of some traditional culture media. In this work we characterized the physiology and biochemistry of five different A. brasilense strains, commonly used as cereal inoculants. The aim of this work is to contribute to pose into revision some concepts concerning the most used protocols to isolate and characterize this bacterium. We characterized their growth in different traditional and non-traditional culture media, evaluated some PGPR mechanisms and characterized their profiles of fatty acid methyl esters and carbon-source utilization. This work shows, for the first time, differences in both profiles, and ACC deaminase activity of A. brasilense strains. Also, we show unexpected results obtained in some of the evaluated culture media. Results obtained here and an exhaustive knowledge revision revealed that it is not appropriate to conclude about bacterial species without analyzing several strains. Also, it is necessary to continue developing studies and laboratory techniques to improve the isolation and characterization protocols.

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“…We found that A. brasilense CECT 590 inoculation increased all morphological parameters, highlighting the stimulatory effect in the root system (Leyva and Bashan, 2008). This increased growth might be caused by phytohormone activity, N fixation, various small molecules and enzymes, enhanced membrane activity, proliferation of the root system, enhanced water and mineral uptake, mobilisation of minerals, mitigation of environmental stressors of plants, and direct and indirect biological control of numerous phytopathogens (Bashan and Holguin, 1997;Bashan and Gonzalez, 1999;Bashan and de Bashan, 2010).…”

Section: Discussionmentioning

confidence: 71%

“…Although there are numerous studies on the effects of A. brasilense in improving the performance of agricultural crops (Okon and Lavandera-Gonzalez, 1994;Bashan et al 2004), there is a lack of knowledge regarding its effect on forest plants Puente et al, 1999;Bacilio et al, 2006;Leyva and Bashan, 2008;Bashan et al, 2009) or its application in agroforestry systems.…”

Section: Resumen La Inoculación De Azospirillum Brasilense Mejora La mentioning

confidence: 99%

Effects of inoculation with Azospirillum brasilense on the quality of Prosopis juliflora seedlings

et al. 2012

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Inoculation of mycorrhizal fungi and rhizobacteria in plants can improve their growth and physiological status, which could be particularly important for agricultural and forestry plants used for the revegetation of arid areas. Prosopis juliflora is a forest pioneer species that is drought resistant and has multiple uses (fodder, shade and shelter for livestock; timber and firewood, live fences and windbreaks in agroforestry systems). Azospirillum brasilense is a rhizobacterium that improves the growth of many agricultural crops. The hypothesis of this study was that P. juliflora seedlings produced in the nursery can respond positively to inoculation with A. brasilense CECT 590. Five months after inoculation, we examined the growth, water relations (osmotic potential at full turgor, osmotic potential at zero turgor, and the modulus of elasticity at full turgor), and concentration and content of macronutrients (N, P, K, Ca and Mg) in the seedlings. Subsequently, a trial was conducted to analyse root growth potential. A. brasilense CECT 590 inoculation caused an osmotic adjustment in P. juliflora seedlings but decreased the elasticity of the cell walls. Inoculation with A. brasilense CECT 590 significantly improved plant growth due in part to an increase of N concentration in the seedlings. A. brasilense CECT 590 inoculation also caused an increase in the root growth potential. The increased growth of P. juliflora seedlings inoculated with A. brasilense was probably caused by more than one mechanism. Inoculation with A. brasilense at the nursery may be a suitable technique for producing improved seedling material for restoration purposes.Key words: PGPR; osmotic adjustment; elastic adjustment; mineral nutrition; nursery; root growth potential. Resumen La inoculación de Azospirillum brasilense mejora la calidad de las plántulas de un mezquite (Prosopis juliflora)La inoculación de hongos de micorrizacion y rizobacterias en las plantas puede mejorar su crecimiento y calidad fisiológica, especialmente en plantas agrícolas y forestales empleadas para la regeneración de zonas áridas. Prosopis juliflora es una especie forestal pionera, resistente a la sequía, y de usos múltiples (forraje, sombra y cobijo para el ganado, madera y leña, cercas vivas y cortinas cortavientos en sistemas agroforestales). Azospirillum brasilense es una rizobacteria que mejora el crecimiento de muchos cultivos agrícolas. La hipótesis de este estudio fue que las plántulas de P. juliflora producidas en vivero pueden responder positivamente a la inoculación con A. brasilense CECT 590. Cinco meses después desde la inoculación, se analizó el crecimiento, relaciones hídricas (potencial osmótico en saturación, potencial osmótico en el punto de pérdida de turgencia, y módulo de elasticidad a total turgor), concentración y contenido de macronutrientes (N, P, K, Ca y Mg) en las plántulas. Posteriormente se realizó un ensayo para analizar el Potencial de Crecimiento Radical. La inoculación de A. brasilense CECT 590 causó un ajuste osmótico de las ...

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Activity of two catabolic enzymes of the phosphogluconate pathway in mesquite roots inoculated with Azospirillum brasilense Cd

Cited by 12 publications

References 33 publications

Root growth improvement of mesquite seedlings and bacterial rhizosphere and soil community changes are induced by inoculation with plant growth‐promoting bacteria and promote restoration of eroded desert soil

Root growth improvement of mesquite seedlings and bacterial rhizosphere and soil community changes are induced by inoculation with plant growth‐promoting bacteria and promote restoration of eroded desert soil

Physiological and biochemical characterization ofAzospirillum brasilensestrains commonly used as plant growth-promoting rhizobacteria

Effects of inoculation with Azospirillum brasilense on the quality of Prosopis juliflora seedlings

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