Positive effect of reduced aeration rate on growth and stereospecificity of dl-malic acid consumption by Azospirillum brasilense: Improving the shelf life of a liquid inoculant formulation

Carrasco-Espinosa, Karen; García-Cabrera, Ramsés I.; Bedoya-López, Andrea; Trujillo‐Roldán, Mauricio A.; Valdez‐Cruz, Norma A.

doi:10.1016/j.jbiotec.2014.12.020

Cited by 11 publications

(7 citation statements)

References 35 publications

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“…This can be observed by the growth of maize sown immediately after inoculation of the pots with Ab-V5 grown in different culture media and culturing times, in turn related to different amounts of the EPS and PHB biopolymers. The importance of the physiological quality of the bacterial cells to the reach of inoculant formulations with high efficiency was previously pointed out (Herrmann and Lesueur, 2013 ; Bashan et al, 2014 ; Carrasco-Espinosa et al, 2015 ). In the present study, we demonstrated that the physiology of inoculant cells determines both the plant response to the inoculation and the maintenance of inoculant cells viability in the soil, even in the absence of a host plant.…”

Section: Discussionmentioning

confidence: 90%

“…For instance, Bashan et al ( 2011 ) increased the growth rate and the final A. brasilense population from 114 to up to 232% by changing the carbon source in the culture medium from glucose to glycerol or gluconate, respectively. Dissolved oxygen also influences the growth of A. brasilense ; an increased lag phase and decreased specific growth rate were observed at dissolved oxygen tensions (DOTs) higher than 85%, while lower DOTs (~3%) increased the growth rate (Trujillo-Roldán et al, 2013 ) and yielded a high accumulation of polyhydroxybutyrate (Carrasco-Espinosa et al, 2015 ).…”

Section: Discussionmentioning

confidence: 99%

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Maize Inoculation with Azospirillum brasilense Ab-V5 Cells Enriched with Exopolysaccharides and Polyhydroxybutyrate Results in High Productivity under Low N Fertilizer Input

et al. 2017

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Although Azospirillum strains used in commercial inoculant formulations presents diazotrophic activity, it has been reported that their ability to produce phytohormones plays a pivotal role in plant growth-promotion, leading to a general recommendation of its use in association with regular N-fertilizer doses. In addition, a high variability in the effectiveness of Azospirillum inoculants is still reported under field conditions, contributing to the adoption of the inoculation technology as an additional management practice rather than its use as an alternative practice to the use of chemical inputs in agriculture. To investigate whether the content of stress-resistance biopolymers would improve the viability and performance of Azospirillum inoculants when used as substitute of N-fertilizers, biomass of A. brasilense strain Ab-V5 enriched in exopolysaccharides (EPS) and polyhydroxybutirate (PHB) was produced using a new culture medium developed by factorial mixture design, and the effectiveness of resulting inoculants was evaluated under field conditions. The culture medium formulation extended the log phase of A. brasilense cultures, which presented higher cell counts and increased EPS and PHB contents than observed in the cultures grown in the OAB medium used as control. An inoculation trial with maize conducted under greenhouse conditions and using the biopolymers-enriched Ab-V5 cells demonstrated the importance of EPS and PHB to the long term bacterial viability in soil and to the effectiveness of inoculation. The effectiveness of liquid and peat inoculants prepared with Ab-V5 cells enriched with EPS and PHB was also evaluated under field conditions, using maize as target crop along different seasons, with the inoculants applied directly over seeds or at topdressing under limiting levels of N-fertilization. No additive effect on yield resulted from inoculation under high N fertilizer input, while inoculated plants grown under 80% reduction in N fertilizer showed yields at levels compared to fully fertilized plants, regardless the inoculation method. The presented data highlights the feasibility to partially substitute the N-fertilizer demand in non-legume crops using high-quality inoculant formulations, prepared with diazotrophic bacteria enriched with stress-resistance biopolymers that confer increased viability an effectiveness to the bacterial cells.

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Section: Discussionmentioning

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Maize Inoculation with Azospirillum brasilense Ab-V5 Cells Enriched with Exopolysaccharides and Polyhydroxybutyrate Results in High Productivity under Low N Fertilizer Input

et al. 2017

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“…Stability of PGPR products is influenced by the production procedure, formulation, transportation, and storage conditions. Thus, following the identification of potentially deployable microbial strains, there is a need to achieve subsequent high levels of survival of biocontrol products (McIntyre and Press, 1991), improve formulation of the novel technology (Lobo et al, 2019), and achieve desirable attributes such as long-term shelf life (Carrasco-Espinosa et al, 2015). During the production procedure, diverse culture media and growth conditions have been studied and optimized for production of targeted microbial types (Pastor-Bueis et al, 2017;Khanghahi et al, 2018;Zhang et al, 2019).…”

Section: Challenges In Using Pgpr As Biocontrol Agentmentioning

confidence: 99%

“…During the production procedure, diverse culture media and growth conditions have been studied and optimized for production of targeted microbial types (Pastor-Bueis et al, 2017;Khanghahi et al, 2018;Zhang et al, 2019). Achieving low-cost production at large scale is a difficult task, but reachable with careful research effort (Trujillo-Roldán et al, 2013;Carrasco-Espinosa et al, 2015;Kang et al, 2017). Liquid formulations are the most popular forms (Lee et al, 2016); many researchers tried to increase the shelf life of PGPR through lowering storage temperature and/or modifying the combinations of additives (Arriel-Elias et al, 2018;Berger et al, 2018).…”

Section: Challenges In Using Pgpr As Biocontrol Agentmentioning

confidence: 99%

Plant Associated Rhizobacteria for Biocontrol and Plant Growth Enhancement

et al. 2021

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Crop disease remains a major problem to global food production. Excess use of pesticides through chemical disease control measures is a serious problem for sustainable agriculture as we struggle for higher crop productivity. The use of plant growth promoting rhizobacteria (PGPR) is a proven environment friendly way of controlling plant disease and increasing crop yield. PGPR suppress diseases by directly synthesizing pathogen-antagonizing compounds, as well as by triggering plant immune responses. It is possible to identify and develop PGPR that both suppress plant disease and more directly stimulate plant growth, bringing dual benefit. A number of PGPR have been registered for commercial use under greenhouse and field conditions and a large number of strains have been identified and proved as effective biocontrol agents (BCAs) under environmentally controlled conditions. However, there are still a number of challenges before registration, large-scale application, and adoption of PGPR for the pest and disease management. Successful BCAs provide strong theoretical and practical support for application of PGPR in greenhouse production, which ensures the feasibility and efficacy of PGPR for commercial horticulture production. This could be pave the way for widespread use of BCAs in agriculture, including under field conditions, to assist with both disease management and climate change conditions.

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“…Além da utilização de conservantes para garantir a viabilidade do microrganismo, a baixa taxa de oxigenação durante o armazenamento está associada com a vida útil do Azospirillum sp., que segundoCarrasco-Espinosa et al (2015), fermentações aeróbias são menos eficientes para este microrganismo.…”

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Principais Fármacos Desenvolvidos a Partir Da Extração Do Veneno De Serpentes Brasileiras E Suas Aplicabilidades Em Medicina Humana E Veterinária

Borges¹,

Botton²,

Brum³

et al. 2022

Conceitos E Metodologias De Integração Em Ciências Biológicas E Da Saúde 2

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Positive effect of reduced aeration rate on growth and stereospecificity of dl-malic acid consumption by Azospirillum brasilense: Improving the shelf life of a liquid inoculant formulation

Cited by 11 publications

References 35 publications

Maize Inoculation with Azospirillum brasilense Ab-V5 Cells Enriched with Exopolysaccharides and Polyhydroxybutyrate Results in High Productivity under Low N Fertilizer Input

Maize Inoculation with Azospirillum brasilense Ab-V5 Cells Enriched with Exopolysaccharides and Polyhydroxybutyrate Results in High Productivity under Low N Fertilizer Input

Plant Associated Rhizobacteria for Biocontrol and Plant Growth Enhancement

Principais Fármacos Desenvolvidos a Partir Da Extração Do Veneno De Serpentes Brasileiras E Suas Aplicabilidades Em Medicina Humana E Veterinária

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