Ultrastructure and Phylogenetic Placement within Heterolobosea of the Previously Unclassified, Extremely Halophilic Heterotrophic Flagellate Pleurostomum flabellatum (Ruinen 1938)

Park, Jong Soo; Simpson, Alastair G. B.; Lee, Won Jin; Cho, Byung C.

doi:10.1016/j.protis.2007.03.004

Cited by 64 publications

(95 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A diversity of other heterotrophic protists were isolated from nearly saturated brines (X30% salinity) that could not grow at salinities of o7.5% (Cho et al, 2008;Park et al, 2006;Park et al, 2007Park et al, , 2009). Based on SSU rRNA gene transcripts recovered within our metatranscriptome libraries, the eukaryotic community appears to be dominated by ciliates and dinoflagellates in the UI, and by ciliates and fungi in the LI (Figure 2).…”

Section: Eukaryotic Signaturesmentioning

confidence: 99%

Unveiling microbial activities along the halocline of Thetis, a deep-sea hypersaline anoxic basin

et al. 2014

View full text Add to dashboard Cite

Deep-sea hypersaline anoxic basins (DHABs) in the Eastern Mediterranean Sea are considered some of the most hostile environments on Earth. Little is known about the biochemical adaptations of microorganisms living in these habitats. This first metatranscriptome analysis of DHAB samples provides significant insights into shifts in metabolic activities of microorganisms as physicochemical conditions change from deep Mediterranean sea water to brine. The analysis of Thetis DHAB interface indicates that sulfate reduction occurs in both the upper (7.0-16.3% salinity) and lower (21.4-27.6%) halocline, but that expression of dissimilatory sulfate reductase is reduced in the more hypersaline lower halocline. High dark-carbon assimilation rates in the upper interface coincided with high abundance of transcripts for ribulose 1,5-bisphosphate carboxylase affiliated to sulfuroxidizing bacteria. In the lower interface, increased expression of genes associated with methane metabolism and osmoregulation is noted. In addition, in this layer, nitrogenase transcripts affiliated to uncultivated putative methanotrophic archaea were detected, implying nitrogen fixation in this anoxic habitat, and providing evidence of linked carbon, nitrogen and sulfur cycles.

show abstract

Section: Eukaryotic Signaturesmentioning

confidence: 99%

Unveiling microbial activities along the halocline of Thetis, a deep-sea hypersaline anoxic basin

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Scale bars = 10 µm. After Broers et al, 1990;Bovee, 1959;Brugerolle & Simpson, 2004;Droop, 1962;Fenchel & Patterson, 1986;Page, 1967Page, , 1988Park et al, 2007;Park & Simpson, 2011;Yubuki & Leander, 2008. Members of the eukaryovorous genus Stephanopogon are strikingly different from the other heteroloboseans. Their vase-shaped and curved cell bodies possess several longitudinal rows of flagella and two isomorphic nuclei.…”

Section: Pseudovahlkampfia Emersoni Fumarolamoeba Ceborucoi Willaermentioning

confidence: 99%

“…Tulamoeba peronaphora grows in the culture at 75‰ -250‰ salinity, Pharyngomonas kirbyi up to 250‰, Euplaesiobystra hypersalinica and Pleurostomum flabellatum flourish in more than 300‰ salinity. The latter two species are true extremophiles, because they live in nearly salt-saturated solutions (Park et al 2007(Park et al , 2009Park & Simpson, 2011). Some other heteroloboseans have adapted to extremely acidic habitats with pH < 3.…”

Section: Ecology Of Heteroloboseamentioning

confidence: 99%

“…Marinamoeba thermophila, Fumarolamoeba ceborucoi and Euplaesiobystra hypersalinica grow up to 50 o C , 2011bPark et al, 2009). Several heteroloboseans, importantly including pathogenic Naegleria strains, survive and divide in temperatures around 40 -45 o C (De Jonckheere 2007;Guzmán-Fierros et al, 2008;Park et al, 2007Park et al, , 2009. In contrast to thermophilic heteroloboseans, there are also few reports on psychrophilic species adapted to cold environments.…”

Section: Ecology Of Heteroloboseamentioning

confidence: 99%

“…It was defined by the presence of amoebae of the limax type and persistence of the nucleolus during mitosis. In addition, the genus Pleurostomum, whose amoeboid stage is unknown or has been lost, was placed within Vahlkampfiidae on the basis of its phylogenetic position (Park et al, 2007). In contrast to Vahlkampfiidae, the nucleolus of members of the family Gruberellidae (genera Gruberella and Stachymoeba) disintegrates during mitosis.…”

Section: Taxonomy Of Heteroloboseamentioning

confidence: 99%

See 2 more Smart Citations