Magnetotactic Bacteria and Their Potential for Terraformation

Ardelean, I.; Moisescu, Cristina; Popoviciu, Dan Răzvan

doi:10.1007/978-1-4020-8837-7_16

Cited by 5 publications

(4 citation statements)

References 67 publications

(99 reference statements)

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“…As perspectives in our research we focus on the following: the potential of MTB for terraformation (2), elaboration of a magnetic model of magnetotactic bacteria (1; 8; 12; 21) heavy metal biosorbtion and gold nanoparticles synthesis.…”

Section: Discussionmentioning

confidence: 99%

Magnetospirillum Gryphiswaldense:Fundamentals and Applications

Ardelean

Moisescu

Ignat

et al. 2009

Biotechnology & Biotechnological Equipment

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In this contribution we show our results on the magnetotactic bacterium Magnetospirillum gryphiswaldense concerning the growth of this bacterium in batch cultures, biochemical analysis (proteins and fatty acids profile), the (respiratory) oxygen consumption in iron-rich and iron-limited cultures, magneto-aerotactic behaviour of the cells, magnetic characterization of intact cells and isolated magnetosomes, and magnetosome isolation. We propose a magneto-mechanic model of magnetosome chain with special aim to further develop nanoactuators and micromanipulators and claim that magnetotactic bacteria could be used for in vivo synthesis of gold nanoparticles and for heavy metals biosorbtion.

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Section: Discussionmentioning

confidence: 99%

Magnetospirillum Gryphiswaldense:Fundamentals and Applications

Ardelean

Moisescu

Ignat

et al. 2009

Biotechnology & Biotechnological Equipment

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“…It was suggested that about 25% population of ALH84001 magnetic crystals are identical to biologically produced crystals Thomas-Keprta et al (2001). Ardelean et al (2008) also focused on possible contributions of MTB to the terraformation of Mars or other planets. Although, there are credible arguments and supports for both the non-biogenic and biogenic hypothesis for the origin of the magnetite particles in ALH84001 meteorite, yet if it's biological origin is proved, such magnetofossils would constitute evidence of the oldest life forms known.…”

Section: As Bio Indicatormentioning

confidence: 99%

Magnetotactic bacteria: nanodrivers of the future

Mathuriya

2015

Critical Reviews in Biotechnology

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Magnetotactic bacteria (MTB) represent a heterogeneous group of Gram-negative aquatic prokaryotes with a broad range of morphological types, including vibrioid, coccoid, rod and spirillum. MTBs possess the virtuosity to passively align and actively swim along the magnetic field. Magnetosomes are the trademark nano-ranged intracellular structures of MTB, which comprise magnetic iron-bearing inorganic crystals enveloped by an organic membrane, and are dedicated organelles for their magnetotactic lifestyle. Magnetosomes endue high and even dispersion in aqueous solutions compared with artificial magnetites, claiming them as paragon nanomaterials. MTB and magnetosomes offer high technological potential in modern science, technology and medicines. This review focuses on the applicability of MTB and magnetosomes in various areas of modern benefits.

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“…As mentioned earlier, MTB use the magnetosomes for geomagnetic navigation in their aquatic habitat, i.e., magnetotaxis. It has been proposed that, in natural environments, magnetotaxis may enable the cells to locate and maintain an optimal position in the water column or in sediments, and that this aligns with their main metabolic needs [31]. The magnetic assisted taxis could help MTB in their navigation toward optimum growth conditions [7]; hence, growing MTB under optimum conditions may in fact inhibit magnetosome production.…”

Section: Metallic Nanoparticle Synthesis By M Magnetotacticum Using E...mentioning

confidence: 99%

Optimization of Growth Conditions for Magnetospirillum magnetotacticum and Green Synthesis of Metallic Nanoparticles

Sancho,

Govindsamy,

Pillay

2023

Applied Sciences

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Nanotechnology is especially useful in biotechnological and biomedical applications as nanomaterials have unique physicochemical properties. Current physical and chemical techniques used for the production of nanoparticles have various disadvantages that has led to the evaluation of biological strategies. This study focused on the use of a bacterial species known as Magnetospirillum magnetotacticum for the production of metallic nanoparticles. The cultivation of MTB is known to be tedious and time-consuming using the current standardized magnetic spirillum growth media (MSGM). This study explored the optimization of MSGM for improved growth and nanoparticle yield. It was found that glucose significantly improved and sustained the growth of M. magnetotacticum compared to other sole carbon sources having a sustainable OD of ~1.15. However, use of a higher concentration of sodium nitrate (40 mM) as a nitrogen source was able to significantly improve iron-containing nanoparticle yield by 1.6× with a final yield of 22 mg/50 mL when compared to the yield obtained from the MSGM original media. Growth media with a combination of glucose, sodium nitrate, ammonium sulphate and yeast extract showed the highest exponential growth of Magnetospirillum magnetotacticum compared to all other MSGM modifications with the highest OD being 1.7. Silver and gold nanoparticles were also successfully produced in addition to iron-containing nanoparticles. Overall, no direct correlation between growth and nanoparticle yield was found.

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Magnetotactic Bacteria and Their Potential for Terraformation

Abstract: His scientific interests are in the areas of: bacteria-based biosensors, hydrogen metabolism in phototrophic bacteria, biology of magnetotactic bacteria and their relevance for bionanotechnology and terraformation.

Cited by 5 publications

References 67 publications

Magnetospirillum Gryphiswaldense:Fundamentals and Applications

Magnetospirillum Gryphiswaldense:Fundamentals and Applications

Magnetotactic bacteria: nanodrivers of the future

Optimization of Growth Conditions for Magnetospirillum magnetotacticum and Green Synthesis of Metallic Nanoparticles

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