A First Record of Obligate Halophilic Aspergilli from the Dead Sea

Nazareth, S.W.; Gonsalves, Valerie; Nayak, S.S.

doi:10.1007/s12088-011-0225-z

Cited by 27 publications

(19 citation statements)

References 14 publications

(18 reference statements)

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“…Fungi inhabiting hypersaline environments may either be halotolerant, growing at varying salt concentrations, or halophilic in the strict sense 18 , requiring a minimum concentration of salts for growth 19 20). In addition to the malformation of reproductive structures in low-salt conditions this observation clearly indicates the adaptation of the strain to hypersalinity.…”

Section: Discussionmentioning

confidence: 99%

Genomic adaptations of the halophilic Dead Sea filamentous fungus Eurotium rubrum

et al. 2014

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The Dead Sea is one of the most hypersaline habitats on Earth. The fungus Eurotium rubrum (Eurotiomycetes) is among the few species able to survive there. Here we highlight its adaptive strategies, based on genome analysis and transcriptome profiling. The 26.2 Mb genome of E. rubrum shows, for example, gains in gene families related to stress response and losses with regard to transport processes. Transcriptome analyses under different salt growth conditions revealed, among other things differentially expressed genes encoding ion and metabolite transporters. Our findings suggest that long-term adaptation to salinity requires cellular and metabolic responses that differ from short-term osmotic stress signalling. The transcriptional response indicates that halophilic E. rubrum actively counteracts the salinity stress. Many of its genes encode for proteins with a significantly higher proportion of acidic amino acid residues. This trait is characteristic of the halophilic prokaryotes as well, supporting the theory of convergent evolution under extreme hypersaline stress.

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Section: Discussionmentioning

confidence: 99%

Genomic adaptations of the halophilic Dead Sea filamentous fungus Eurotium rubrum

et al. 2014

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“…Twenty seven strains of A. penicillioides were tested, which were previously isolated from the Dead Sea water (DSw) and sediment (DSs) samples (Nazareth et al, 2012), from the estuary of Mandovi, Goa, on the West Coast of the Indian peninsula, surface and bottom waters (EMw s and EMw b ) and from sediment (EMs) samples (Gonsalves et al, 2012), from water samples from mangroves of Ribander, Goa (MRw) and from solar salterns at Santa Cruz (SCw), Goa, India (Nayak et al, 2012). The isolate numbers along with the sites of isolation are shown in Table 1 .…”

Section: Methodsmentioning

confidence: 99%

Halophilic Aspergillus penicillioides from athalassohaline, thalassohaline, and polyhaline environments

Nazareth

Gonsalves

2014

Front. Microbiol.

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Aspergillus penicillioides is a true halophile, present in diverse econiches – from the hypersaline athalassohaline, and thalassohaline environments, to polyhaline systems, and in different geographical locations. Twenty seven isolates from these environments, were seen to be moderate halophiles, euryhaline in nature. They had an obligate need of a low aw and were unable to grow on a regular defined medium such as Czapek Dox Agar, as well as on varied nutrient rich agar media such as Malt Extract, Potato Dextrose and Sabouraud Agar; however, growth was obtained on all these media when amended with 10% solar salt. In absence of added salt, the conidia either did not germinate, or when germinated, distortions and lysis were seen in the short mycelial forms; on media with salt, the mycelia and vesicles appeared normal.

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“…It is known from several habitats, e.g. soil (Baakza et al 2004), marine environments (Baakza et al 2004, Nazareth et al 2012) and freshwater (Kinsey et al 1998). Thus, it is a good candidate for persisting immigration.…”

Section: Flooding As a Factor For Organism Exchange And Shifts In Commentioning

confidence: 99%

Effects of short-term flooding on aquatic and terrestrial microeukaryotic communities: a mesocosm approach

Graupner¹,

Röhl²,

Jensen³

et al. 2017

Aquat. Microb. Ecol.

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Freshwater and soil are not strictly isolated habitats. In particular, floods may facilitate the exchange of organisms and nutrients. Flooding can have both a stimulating and a harmful effect on the organisms of the respective habitats. The effects of short-term flooding on microeukaryotic communities in the aquatic and terrestrial habitat have so far been scarcely studied. Here, we investigated the effect of a 24 h artificial inundation on the microeukaryotic community composition in AquaFlow mesocosm systems. We investigated the shift of community composition based on molecular amplicon diversity both on soil and water during flooding and for a period of 12 d after flooding. Community composition was, as expected, strongly different between soil and water. Flooding had a significant effect on the freshwater community, whereas the soil community was hardly affected. In particular, we observed a transfer of nutrients from the terrestrial habitat into the aquatic habitat and identified ~50 taxa that were transferred by the flooding event. This effect of flooding was, however, overlaid by shifts of the communities with time, presumably reflecting an acclimatization to the conditions in the AquaFlow systems.

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A First Record of Obligate Halophilic Aspergilli from the Dead Sea

Cited by 27 publications

References 14 publications

Genomic adaptations of the halophilic Dead Sea filamentous fungus Eurotium rubrum

Genomic adaptations of the halophilic Dead Sea filamentous fungus Eurotium rubrum

Halophilic Aspergillus penicillioides from athalassohaline, thalassohaline, and polyhaline environments

Effects of short-term flooding on aquatic and terrestrial microeukaryotic communities: a mesocosm approach

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