halophile

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Dr Warhol’s Periodic Table of Microbes


51. Sb. Salinibacter

If you put so much salt on your food that your friends and family think you’re trying to kill yourself, you just may want to hang out with Salinibacter.

The organism was isolated from salt crystallization ponds in Spain. It cannot live below 15% salinity and prefers between 20% and 30% salt concentration. Remember those osmolarity labs with human red blood cells? We are at around 0.9%, these microbes enjoy 20X that amount!

Some people feel that it is important that Salinibacter is a halophilic bacterium rather than a halophilic Archaean. You may also. This is a relatively new genus of microbes, first described in 2002.

At a molecular level, these microbes have adaptations to cope and thrive with high salt levels. There are three recognized Salinibacter species: iranicus, luteus, and ruber. You can probably guess that ruber produces red pigmented colonies, luteus grows up orange, and iranicus was isolated in Iran.

If you like travelling to salt lakes, you could also find these in Tuz Lake in Turkey, the Wadi an Natrun depression in Egypt, and in the Peruvian Andes.

Salinibacter is a Gram negative very long rod, measuring around 0.5 microns wide by 15 to 60 microns long!

Cover your walls in Periodic Table of Microbes posters! You can’t do the Microbiome thing without one! https://www.etsy.com/no-en/shop/WarholScience.

Copyright 2016 Warhol.

7

Salt Pond Ecosystem

The color of salt ponds range from pale green to deep coral pink, and indicate the salinity of the ponds. Microorganisms create these spectacular colors, changing their own hues in response to increasing salinity.

In low-to mid-salinity ponds, green algae proliferate and lend the water a green cast. As the salinity increases, an algae called Dunaliella out-competes other microorganisms in the pond, and the color shifts to an even lighter shade of green. In mid-salinity ponds, millions of tiny brine shrimp clarify the brine and contribute an orange cast to the water. And in mid-to high-salinity ponds, high salt concentrations actually trigger the Dunaliella to produce a red carotenoid pigment. Halophiles, such as Halobacteria and Stichococcus, also contribute red tints to the hypersaline brine.

Kite aerial photographs by Charles “Cris” Benton.

gizmodo.com
What Sorts of Life Forms Could Actually Live on Mars?
Yesterday, NASA reignited our hopes of finding alien life when it announced the first direct evidence of liquid water on Mars. But before we start indulging in fantasies of space crabs and reptilian beings, we ought to remember that Mars is a frigid world with a thin atmosphere. And that raises an obvious question: What sorts of life forms could actually live there?
By Maddie Stone

Halophiles are p cool

Cakile maritima
31/08/2014
Family: Brassicaceae (Cabbage)
Genus: Cakile
Species: C. maritima
Common Name: Sea Rocket
Location: NT516859
Habitat: As the name suggests this plant usually grows next to the sea. Most often found at the top of the beach where grasses such as Marram (Ammophila arenaria) and Sea Lyme (Leymus arenarius) begin to pop up.
Collector: Ewan Cole
Authority: Scop.

Waiter, My Marswater Is Too Salty For Life -- Isn't It?

Waiter, My Marswater Is Too Salty For Life — Isn’t It?

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So, today NASA announced the presence of liquid water on the surface of Mars, in the form of seasonal saline (brine) flows. Which is exciting. And maybe a little disappointing, too.

A seasonal brine flow doesn’t exactly sound like something you could find life in at all — consider that salting is a pretty darn effective way to preserve food here on Earth. The salt prevents bacteria from thriving…

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Lake Retba, Senegal Credit: © WENN.com

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Micrograph of Dunaliella salina

No photo-shopping here folks…that water is pink! It’s Lake Retba, aka Lac Rose, in the Cap Vert peninsula of Senegal. The pink is caused by the harmless Dunaliella salina halophile (an algae that can live in a very high salt concentration).   These free-floating microbes harvest energy from the sun through the process of…

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Halomonas xiaochaidanensis sp. nov., isolated from a salt lake sediment

Abstract

A short-rod-shaped moderately halophilic bacterium, designated CUG 00002T, was isolated from the sediment of Xiaochaidan salt lake in Qinghai Province, China by using R2A medium. The cells were Gram-staining negative, aerobic, forming creamy and circular colonies with diameters of 2–3 mm on R2A agar when incubated at 30 °C for 3 days. 16S rRNA gene-based phylogenetic analysis indicated that strain CUG 00002T belonged to the genus Halomonas in the class Gammaproteobacteria, showing highest sequence similarity of 97.1 and 96.7 % to Halomonas mongoliensis Z-7009T (=DSM 17332=VKM B2353) and Halomonas shengliensis SL014B-85T (=CGMCC 1.6444T=LMG 23897T), respectively. The predominant isoprenoid quinone was ubiquinone-9 (Q9), and the major fatty acids were C16:0, summed feature 3 (comprising C16:1ω7c and/or C16:1ω6c) and summed feature 8 (comprising C18:1ω7c or C18:1ω6c). The genomic DNA G+C content of strain CUG 00002T was 61.8 mol%. The above characteristics were consistent with the placement of the organism in the genus Halomonas. The level of DNA–DNA relatedness between CUG 00002T and its most closely related strain H. mongoliensis Z-7009T was 41.0 ± 1.6 %. Based on the results of phenotypic, phylogenetic and biochemical analyses, strain CUG 00002T represents a novel species of the genus Halomonas, for which the name Halomonas xiaochaidanensis sp. nov. is proposed. The type strain is CUG 00002T (=CCTCC AB 2014152T=KCTC 42685T).

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