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Groß, Wolfgang

doi:10.1023/a:1004054317446

Cited by 148 publications

(33 citation statements)

References 49 publications

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“…How does G. sulphuraria maintain near-neutral cytosolic pH against a 10 6 -fold H + gradient across its plasma membrane (15,16)? There is no evidence for an enhanced capacity to pump H + out of the cytosol (which would be an energetically intense strategy).…”

Section: Gene Transfer From Bacteria and Archaea Facilitated Evolutiomentioning

confidence: 99%

Gene Transfer from Bacteria and Archaea Facilitated Evolution of an Extremophilic Eukaryote

Schönknecht

Chen

Ternes

et al. 2013

Science

434

349

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Ecology 92, 218 (2011* Some microbial eukaryotes, such as the extremophilic red alga Galdieria sulphuraria, live in hot, toxic metal-rich, acidic environments. To elucidate the underlying molecular mechanisms of adaptation, we sequenced the 13.7-megabase genome of G. sulphuraria. This alga shows an enormous metabolic flexibility, growing either photoautotrophically or heterotrophically on more than 50 carbon sources. Environmental adaptation seems to have been facilitated by horizontal gene transfer from various bacteria and archaea, often followed by gene family expansion. At least 5% of protein-coding genes of G. sulphuraria were probably acquired horizontally. These proteins are involved in ecologically important processes ranging from heavy-metal detoxification to glycerol uptake and metabolism. Thus, our findings show that a pan-domain gene pool has facilitated environmental adaptation in this unicellular eukaryote.

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Section: Gene Transfer From Bacteria and Archaea Facilitated Evolutiomentioning

confidence: 99%

Gene Transfer from Bacteria and Archaea Facilitated Evolution of an Extremophilic Eukaryote

Schönknecht

Chen

Ternes

et al. 2013

Science

434

349

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“…More often, however, the low pH is the result of human influence, mostly in the form of acid mine drainage released by mining activities (Lukešová 2001, Sabater et al 2003, Novis & Harding 2007. The extent of these effects is usually localized, and consequently the distribution of highly acidic habitats is patchy and fragmented (Gross 2000, Weisse et al 2011. However, sites with low pH exist in all continents and the overall extent of these habitats on global scale is not negligible; for example, in the recent past it was considered that approximately 15,000 km of streams in the U.S. were affected by acid mine drainage (Gross 2000).…”

Section: Introductionmentioning

confidence: 99%

“…High concentrations of heavy metals such as Fe, Cu, Pb, Al and Zn are often recorded in soils and waters with low pH (Gross 2000, Aguilera et al 2007b, Novis & Harding 2007, Spijkerman & Weithoff 2012, whereas at sites with geothermal activities acidity is accompanied by high temperatures (up to 83°C; Huss et al 2002, Pollio et al 2005, Spijkerman & Weithoff 2012. Additionally, most extremely acidic environments contain relatively low concentrations of dissolved organic carbon, and may therefore be considered oligotrophic (Johnson 1998), with further limitation for the growth of autotrophic organisms.…”

Section: Introductionmentioning

confidence: 99%

Molecular evidence for the polyphyletic origin of low pH adaptation in the genus Klebsormidium (Klebsormidiophyceae, Streptophyta)

Škaloud¹,

Lukešová²,

Malavasi³

et al. 2014

Plecevo

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Background and aims -Algae living in low pH environments have been the subject of numerous studies, but their phylogenetic relationships with relatives found in non-acidic habitats are poorly known. In the present study we analyzed the morphology and phylogeny of acid-adapted strains of Klebsormidium, a genus of filamentous green algae frequently present in low pH environments. Methods -Eighteen strains of Klebsormidium were collected from from low pH habitats in Europe and U.S.A., mainly from terrestrial sites affected directly or indirectly by carbon mining activities. These algae were isolated in culture and their phylogenetic relationships were studied using rbcL and ITS rDNA sequence data in a concatenated dataset.

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“…Low pH of AMD-contaminated water bodies resembles that of some naturally occurring freshwater systems that harbor acidophiles (Novis and Harding 2007). Acidophilic algae are able to grow at a pH as low as 0.05 (Lee 1999;Gross 2000). In the extremely acidic Tinto River algae contributed more than 60% of the total biomass and the diversity was very high (Amaral Zettler et al 2002).…”

Section: Eukaryotes In Amd Environmentsmentioning

confidence: 99%

“…Yeast like S. cerevisiae produces H 2 S to scavange unnecessary heavy metals (Gadd and Griffiths 1978). Algae thrive in low pH by reducing proton influx, increasing proton pump efficiency and managing low CO 2 for photosynthesis (Gross 2000). Fungi tolerate high acidity by supposedly keeping their internal pH neutral.…”

Section: Toxicity and Tolerancementioning

confidence: 99%

Eukaryotes in acidic mine drainage environments: potential applications in bioremediation

Das

Roy

Singh

et al. 2009

Rev Environ Sci Biotechnol

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Passive remediation of Acid Mine Drainage (AMD) is a popular technology continuously under development for more than 50 years now. Roles of eukaryotes, the natural residents of AMD and its attenuator are not emphasized adequately. Studies suggest that macrophyte distinctively generate alkalinity through benthic sediments as part of root respiration. Other eukaryotic populations effectively enrich the carbon source for maintaining sulphate reducing bacterial (SRB) populations and act symbiotically. Algae produce anoxic zones for SRB action and help in biogenic alkalinity generation. While studies on algal populations and actions are relatively available those on fungal population are limited. Fungi show capacity to absorb significant amount of metals in their cell wall, or by extra cellular polysaccharide slime. This review examines the roles of these microorganisms and documents their activities in holistic form in the mine water environment. This work discusses the potential areas of likely future research that could enable AMD remediation using active eukaryotes to be made on sound understanding.

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Cited by 148 publications

References 49 publications

Gene Transfer from Bacteria and Archaea Facilitated Evolution of an Extremophilic Eukaryote

Gene Transfer from Bacteria and Archaea Facilitated Evolution of an Extremophilic Eukaryote

Molecular evidence for the polyphyletic origin of low pH adaptation in the genus Klebsormidium (Klebsormidiophyceae, Streptophyta)

Eukaryotes in acidic mine drainage environments: potential applications in bioremediation

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