Production of amino acids by Azotobacter vinelandii and Azotobacter chroococcum with phenolic compounds as sole carbon source under diazotrophic and adiazotrophic conditions

Revillas, J. J.; Rodelas, B.; Pozo, Clementina; Martı́nez-Toledo, M.V.; López, José Manuel López

doi:10.1007/s00726-004-0153-x

Cited by 10 publications

(8 citation statements)

References 10 publications

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“…In addition, it produces the bioplastic alternative polyhydroxybutyrate (PHB) at up to 80–90% of its biomass when a nutrient other than carbon (such as oxygen or iron) is limiting . Wildtype A. vinelandii is rod-shaped and around 2 μm in length and secretes both ammonia and amino acids into the media, in addition to plant growth hormones. , Alternatively, it can be readily engineered to produce increased alginate, to accumulate PHB during exponential growth, and to secrete higher levels of ammonia . However, this microorganism requires a fixed carbon source, which is currently considered to be cost prohibitive for the industrial production of PHB. , …”

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confidence: 99%

A Designed A. vinelandii–S. elongatus Coculture for Chemical Photoproduction from Air, Water, Phosphate, and Trace Metals

Smith

Francis

2016

ACS Synth. Biol.

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Microbial mutualisms play critical roles in a diverse number of ecosystems and have the potential to improve the efficiency of bioproduction for desirable chemicals. We investigate the growth of a photosynthetic cyanobacterium, Synechococcus elongatus PCC 7942, and a diazotroph, Azotobacter vinelandii, in coculture. From initial studies of the coculture grown in media with glutamate, we proposed a model of cross-feeding between these organisms. We then engineer a new microbial mutualism between Azotobacter vinelandii AV3 and cscB Synechococcus elongatus that grows in the absence of fixed carbon or nitrogen. The coculture cannot grow in the absence of a sucrose-exporting S. elongatus, and neither organism can grow alone without fixed carbon or nitrogen. This new system has the potential to produce industrially relevant products, such as polyhydroxybutyrate (PHB) and alginate, from air, water, phosphate, trace metals, and sunlight. We demonstrate the ability of the coculture to produce PHB in this work.

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confidence: 99%

A Designed A. vinelandii–S. elongatus Coculture for Chemical Photoproduction from Air, Water, Phosphate, and Trace Metals

Smith

Francis

2016

ACS Synth. Biol.

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“…ability to release plant growth regulators (PGR) such as polyamines, ethylene, indoleacetic acid and amino acids, the type and quantity of the released substances varied, depending on the presence of combined-N in the medium. Revillas et al (2005) stated that the Azotobacter was not only fixed nitrogen but also produce amino acids, organic acids, vitamins, antimicrobial substances and increased microbial community and plant growth. The foliar application of plant growth promoting rhizobacteria (PGPR) such as Azospirillium, Azotobacter, Bacillus and Rhizobium improved yield increases of plants and product plant form fungal diseases (Basha et al, 2006 andEsitken et al, 2006).…”

Section: Influence Of Foliar Applied Mineral and Biofertilizers On Thmentioning

confidence: 99%

“…Azotobacter density: Data in Table 8 showed that the foliar application of mineral and bio-fertilizers increased the growth of Azotobacter density in the phyllosphere (surface leaves) of fig and olive. Azotobacter chrococcum was not only fixed nitrogen but also produced amino acids, organic acids, vitamins, antimicrobial substances and increased microbial community and plant growth (Revillas et al 2005). The superior treatment was (Bio 1 Fol 4 with Micronutrients) the integration treatment between mineral fertilizer and bio-fertilizers which achieved highest fruits yield parameters, nutrients contents, biochemical contents total microbial contents and Azotobacter density contents.…”

Section: Effect Mineral and Bio-fertilizers On Nutrients Uptake By Frmentioning

confidence: 99%

Influence of Foliar Applied Mineral and Biofertilizers on the Yield Parameters of Fig and Olive Trees Grown in the Northwestern Coast of Egypt

2016

Egypt.J. Soil Sci.

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The main source of irrigation water to fig and olive trees in the Northwestern Coast of Matrouh Province is rains water which is starting from October or November until February and March every year. In some areas, possible use supplementary irrigation water system from wells water after the rainy season is ens. The most soils of the Northwestern Coast are calcareous soils which are different in the calcium carbonate content from one region to another. Regarding to the mineral fertilizers functions in plant; the macronutrients functions in plant such as; the photosynthetic processes in leaves and plant growth were remarkably improved by high nitrogen nutrition. Nitrogen contributes greatly in the formation of the following, protein synthesis, necessary component in cell structure, leafy growth and carbohydrate production (Cechin & Fumis, 2004 and Weisany et al., 2013). Phosphorus involved in the photosynthesis, energy and nutrient transport in plant, it can establish a strong root base and produce strong all through the growth plant stages (Ceulemans et al., 2011 and Lambers et al., 2014). Potassium is involved in many processes in plant such as photosynthesis, water retention and uptake of the plant, protects plant from frost, reduce it disease in root, shoots and leaves of the plant, has good characteristics quality such as producing of uniform size, color and maturity, with enhanced flavor, free of blemishes and devoid of any sign of diseases (Britto and Kronzucker, 2008 and Wang et al., 2013). The micronutrients functions in plant such as; Iron (Fe) involves for many processes in plant such as the process of absorption from the soil through the roots, control transfers from the roots to the parts of the plant above soil surface, the intensification of the iron concentration in the mitochondria and chloroplasts and during seed germination and reduce the presence of iron in the wood (Conte and Walker, 2011). Iron deficiency leads to facilitate the transfer of heavy metal such as manganese, zinc, cobalt, and cadmium, while sufficient level or above of iron prevents it (Barberona et al., 2014). Plant's ability to withhold iron and redistribute within the plant for non-iron link the causes of infectious diseases to the presence of competing on the iron link between them and thus increase the plant's ability to cope with such infectious diseases (Expert et al., 2012). Manganese (Mn) plays an important role for many processes in plant such as oxidation and reduction processes in plants, such as the electron transport in photosynthesis, in chlorophyll production, as an activating for more 35 different enzymes and carbohydrates synthesis (Mousavi et al., 2011). Zn influences the activity of plant enzymes, hydrogenase, carbonic anhydrase and synthesis of cytochrome, Zn involves in plant carbohydrate metabolism, maintenance of the integrity of cellular membranes, protein synthesis, regulation of auxin synthesis and pollen formation, Zn has positive effect on water uptake and transport in plants and also reduces the adve...

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“…Interaction of A.chroococcum and B. megatherium with silicon foliar application at 1000 mg/L in mixed treatment recorded the highest counts and highest % of increase than control to be 67 and 70×10 4 cfu/g dry soil for counts and 187% and 189% for % of increase at flowering stage of sunflower during two seasons, respectively. The promoting effect due to application of A. chroococcum not only due to the nitrogen fixation but also to the production of plant growth promoting substances, production of amino acids, organic acids, vitamins and antimicrobial substances as well, which increase soil fertility, microbial community and plant growth (Revillas et al, 2005).…”

Section: Specific Microbial Activities 421 Azotobacter Densitiesmentioning

confidence: 99%

Effect of Biofertilization and Silicon Foliar Application on Productivity of Sunflower (Helianthus annuus L.) under New Valley Conditions

2013

Egypt.J. Soil Sci.

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WO field experiments were carried out at Desert Research Center (D.R.C.), Agricultural Experimental Station at EL-Kharga, New Valley Governorate, during the two summer growing seasons of 2010 and 2011, these experiments aimed to study the effect of biofertilization (Azotobacter chroococcum, Bacillus megatherium (PDB) and mixture of two isolates) and silicon spraying rates (200, 400, 600,800 and 1000 mg/L.) against control on the productivity of Sunflower (Helianthus annuus L.) by using cultivar Sakha 53. The experiments were laid out in a split plot design with four replicates. Foliar application of silicon treatments were arranged in the main plots and biofertilization treatments in the sub-plots. Results showed that both spraying silicon and biofertilization treatments had enhancement effect on plant height, number of leaves, leaves surface area, fresh and dry weight of leaves/plant and stem diameter, also head diameter, seeds number/head and 100-seed weight as well as seed and straw yields. Moreover, seed oil percentage and oil yield. The enhancement effect of all abovementioned traits with inoculation of Azotobacter chroococcum, PDB individual or mixed compared with the control treatment (without biofertilization). Also, remarkable influence of the interaction between silicon foliar application and biofertilization treatments on all yield and yield components. Results also indicated significant microbial activity in rhizosphere soil expressed by total microbial counts, CO 2 evolution, Azotobacter and Phosphate dissolving bacteria counts and Enzymatic activities (Dehydrogenase,Nitrogenase and Phosphatase) exihibited positive response in all treatments compared to uninoculated control.

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Production of amino acids by Azotobacter vinelandii and Azotobacter chroococcum with phenolic compounds as sole carbon source under diazotrophic and adiazotrophic conditions

Cited by 10 publications

References 10 publications

A Designed A. vinelandii–S. elongatus Coculture for Chemical Photoproduction from Air, Water, Phosphate, and Trace Metals

A Designed A. vinelandii–S. elongatus Coculture for Chemical Photoproduction from Air, Water, Phosphate, and Trace Metals

Influence of Foliar Applied Mineral and Biofertilizers on the Yield Parameters of Fig and Olive Trees Grown in the Northwestern Coast of Egypt

Effect of Biofertilization and Silicon Foliar Application on Productivity of Sunflower (Helianthus annuus L.) under New Valley Conditions

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