Chemotaxis of Leptospirillum ferrooxidans and other acidophilic chemolithotrophs: comparison with the Escherichia coli chemosensory system

Acuña, José Manuel Borrero‐de; Rojas, J.; Amaro, Ana María González; Toledo, Héctor; Jerez, Carlos A.

doi:10.1016/0378-1097(92)90453-u

Cited by 30 publications

(10 citation statements)

References 29 publications

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“…The excreted organic compounds are assumed to be inhibitory to lithotrophic bacteria (Tuttle 10nml0.0kU 4.20E3 0488^40 and Dugan, 1976;Matin, 1978;Harrison, 1984;Wichlacz and Thompson, 1988). This hypothesis was supported by a recent study by Acuna et al (1992). They demonstrated in their work on chemotaxis of L. ferrooxidans that the amino acid aspartate is a repellent.…”

Section: Resultsmentioning

confidence: 59%

Physiological characteristics ofthiobacillus ferrooxidansandleptospirillum ferrooxidansand physicochemical factors influence microbial metal leaching

Hallmann

Friedrich

Koops

et al. 1992

Geomicrobiology Journal

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Section: Resultsmentioning

confidence: 59%

Physiological characteristics ofthiobacillus ferrooxidansandleptospirillum ferrooxidansand physicochemical factors influence microbial metal leaching

Hallmann

Friedrich

Koops

et al. 1992

Geomicrobiology Journal

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“…It has been shown that both Leptospirillum group II and III possess a chemotaxis system and a flagellar operon [32] . L. ferrooxidans can sense substrates via its chemotaxis system [33] . In addition, EPS production by cells of L. ferrooxidans is generally higher than by cells of At.…”

Section: Initial Attachment To Pyrite By Pure and Mixed Culturesmentioning

confidence: 99%

Interactions of the extremely acidophilic archaeon Ferroplasma acidiphilum with acidophilic bacteria during pyrite bioleaching

Maulani¹,

Li²,

Sand³

et al. 2016

Appl Env Biotechnol

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Bioleaching has been applied as a successful technique for metal recovery from various mineral sources like low-grade ores, waste materials and tailings. Mixed cultures of bioleaching microorganisms have a high performance in mineral dissolution. Thus far, microbial interactions in bioleaching communities are poorly understood. In this paper, the acidophilic archaeon Ferroplasma acidiphilum and the bacteria Leptospirillum ferriphilum and Sulfobacillus thermosulfidooxidans were chosen to study their interactions during pyrite leaching. The initial attachment to pyrite and pyrite leaching efficiency of pure and mixed populations were investigated. The data indicate: (i) attachment and bioleaching efficiency of L. ferriphilum was reduced in the presence of F. acidiphilum. However, the combination of F. acidiphilum and S. thermosulfidooxidans showed increased leaching, although the initial attachment rate was reduced, when compared to pure cultures. Thus, synergistic or antagonistic interactions may exist between F. acidiphilum and S. thermosulfidooxidans or F. acidiphilum and L. ferriphilum, respectively; (ii) pre-established biofilms of L. ferriphilum inhibited initial attachment to pyrite by cells of F. acidiphilum and did not promote pyrite leaching by F. acidiphilum. In contrast, inactivated biofilm cells of S. thermosulfidooxidans enhanced pyrite bioleaching by F. acidiphilum; (iii) adhesion forces of cells to an AFM tip (Si3N4) seemed to be not correlated to attachment and bioleaching capacity; and (iv) lectins were applied to show and distinguish single species in mixed biofilm populations. Physical contact between cells of S. thermosulfidooxidans and F. acidiphilum was visible.

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“…ferrooxidans and A. ferrooxidans possess chemotaxis systems for sensing Fe(II), which might function to identify specific sites on pyrite surfaces for attachment [308,309]. Quorum sensing functions in bioleaching bacterium allow for swarming behavior on metal sulfides and play a key role in biofilm formation, enhancing dissolution of the mineral substrate [310][311][312][313][314][315].…”

Section: Attachment Of Extreme Thermoacidophiles To Surfacesmentioning

confidence: 99%

The Confluence of Heavy Metal Biooxidation and Heavy Metal Resistance: Implications for Bioleaching by Extreme Thermoacidophiles

et al. 2015

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Extreme thermoacidophiles (Topt > 65 °C, pHopt < 3.5) inhabit unique environments fraught with challenges, including extremely high temperatures, low pH, as well as high levels of soluble metal species. In fact, certain members of this group thrive by metabolizing heavy metals, creating a dynamic equilibrium between biooxidation to meet bioenergetic needs and mechanisms for tolerating and resisting the toxic effects of solubilized metals. Extremely thermoacidophilic archaea dominate bioleaching operations at elevated temperatures and have been considered for processing certain mineral types (e.g., chalcopyrite), some of which are recalcitrant to their mesophilic counterparts. A key issue to consider, in addition to temperature and pH, is the extent to which solid phase heavy metals are solubilized and the concomitant impact of these mobilized metals on the microorganism's growth physiology. Here, extreme thermoacidophiles are examined from the perspectives of biodiversity, heavy metal biooxidation, metal resistance mechanisms, microbe-solid interactions, and application of these archaea in biomining operations.

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Chemotaxis of Leptospirillum ferrooxidans and other acidophilic chemolithotrophs: comparison with the Escherichia coli chemosensory system

Cited by 30 publications

References 29 publications

Physiological characteristics ofthiobacillus ferrooxidansandleptospirillum ferrooxidansand physicochemical factors influence microbial metal leaching

Physiological characteristics ofthiobacillus ferrooxidansandleptospirillum ferrooxidansand physicochemical factors influence microbial metal leaching

Interactions of the extremely acidophilic archaeon Ferroplasma acidiphilum with acidophilic bacteria during pyrite bioleaching

The Confluence of Heavy Metal Biooxidation and Heavy Metal Resistance: Implications for Bioleaching by Extreme Thermoacidophiles

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