Distribution and phenotypic characteristics of common bean (<i>Phaseolus vulgaris L</i>.) nodulating bacteria in diverse soils

Kawaka, Fanuel; John, McCormick

doi:10.1080/09064710.2020.1807595

Cited by 2 publications

(2 citation statements)

References 28 publications

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“…Soil bacteria Rhizobium sp. is one of the major elements for the maintenance of soil fertility where it has the ability to fix nitrogen in leguminous plants [ 19 , 20 , 21 ]. Symbiotic nitrogen fixation is sensitive to heavy metals in soil [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Microbial Sensing and Removal of Heavy Metals: Bioelectrochemical Detection and Removal of Chromium(VI) and Cadmium(II)

et al. 2021

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The presence of inorganic pollutants such as Cadmium(II) and Chromium(VI) could destroy our environment and ecosystem. To overcome this problem, much attention was directed to microbial technology, whereas some microorganisms could resist the toxic effects and decrease pollutants concentration while the microbial viability is sustained. Therefore, we built up a complementary strategy to study the biofilm formation of isolated strains under the stress of heavy metals. As target resistive organisms, Rhizobium-MAP7 and Rhodotorula ALT72 were identified. However, Pontoea agglumerans strains were exploited as the susceptible organism to the heavy metal exposure. Among the methods of sensing and analysis, bioelectrochemical measurements showed the most effective tools to study the susceptibility and resistivity to the heavy metals. The tested Rhizobium strain showed higher ability of removal of heavy metals and more resistive to metals ions since its cell viability was not strongly inhibited by the toxic metal ions over various concentrations. On the other hand, electrochemically active biofilm exhibited higher bioelectrochemical signals in presence of heavy metals ions. So by using the two strains, especially Rhizobium-MAP7, the detection and removal of heavy metals Cr(VI) and Cd(II) is highly supported and recommended.

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Section: Introductionmentioning

confidence: 99%

Microbial Sensing and Removal of Heavy Metals: Bioelectrochemical Detection and Removal of Chromium(VI) and Cadmium(II)

et al. 2021

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“…Phenotypic traits often used include growth rate, mucous production, colony characteristics, and change in pH of the isolates during growth on Yeast Extract Mannitol Agar (YEMA) media (Hungria and Kaschuk 2014 ; Maatallah et al 2002 ). Growth in YEMA has been used to classify pure bacterial colonies into either slow or fast growers, presence or absence of mucous, low or high pH among other properties such colony colour, margin and diameter (Kawaka and Muoma 2020 ). Microscopy and staining also group isolates into either Gram positive or negative in addition to absorption of Congo red dye (Kawaka et al, 2014 ).…”

Section: Phenotypic Cultural and Metabolic Characteristicsmentioning

confidence: 99%

Characterization of symbiotic and nitrogen fixing bacteria

Kawaka

2022

AMB Expr

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Symbiotic nitrogen fixing bacteria comprise of diverse species associated with the root nodules of leguminous plants. Using an appropriate taxonomic method to confirm the identity of superior and elite strains to fix nitrogen in legume crops can improve sustainable global food and nutrition security. The current review describes taxonomic methods preferred and commonly used to characterize symbiotic bacteria in the rhizosphere. Peer reviewed, published and unpublished articles on techniques used for detection, classification and identification of symbiotic bacteria were evaluated by exploring their advantages and limitations. The findings showed that phenotypic and cultural techniques are still affordable and remain the primary basis of species classification despite their challenges. Development of new, robust and informative taxonomic techniques has really improved characterization and identification of symbiotic bacteria and discovery of novel and new species that are effective in biological nitrogen fixation (BNF) in diverse conditions and environments.

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Distribution and phenotypic characteristics of common bean (Phaseolus vulgaris L.) nodulating bacteria in diverse soils

Cited by 2 publications

References 28 publications

Microbial Sensing and Removal of Heavy Metals: Bioelectrochemical Detection and Removal of Chromium(VI) and Cadmium(II)

Microbial Sensing and Removal of Heavy Metals: Bioelectrochemical Detection and Removal of Chromium(VI) and Cadmium(II)

Characterization of symbiotic and nitrogen fixing bacteria

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