science

Salisediminibacterium halotolerans

Salisediminibacterium halotolerans is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Salisediminibacterium halotolerans rather than just read about it. In short: Salisediminibacterium halotolerans is a gram-positive, alkalitolerant, and halophilic bacterium from the family Bacillaceae and genus of Salisediminibacterium, which was one of three bacterial strains, and the only novel species, isolated from sediments from the Xiarinaoer soda lake in Mongolia in 2012. History Salisediminibacterium halotolerans (strain halo-2T) was one of three bacterial strains extracted from sedi…

Key takeaways

Salisediminibacterium halotolerans belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Salisediminibacterium halotolerans to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Salisediminibacterium halotolerans from memory before moving on to harder problems.

Reference excerpt

Salisediminibacterium halotolerans is a gram-positive, alkalitolerant, and halophilic bacterium from the family Bacillaceae and genus of Salisediminibacterium, which was one of three bacterial strains, and the only novel species, isolated from sediments from the Xiarinaoer soda lake in Mongolia in 2012.

History Salisediminibacterium halotolerans (strain halo-2T) was one of three bacterial strains extracted from sediment of the Xiarinaoer soda lake located in the Inner Mongolia Autonomous Region. The other strains include Halolactibacillus alkaliphilus and Salsuginibacillus halophilus, which are two novel strains of halophilic bacterial species that had already been discovered. At the time the sediment samples were collected from the lake, the sediment was −1 °C, had a pH of 9.91, and the salinity of the overlying water was 84 g l−1. Strain halo-2T appeared to most closely relate to two unidentified isolates from Soda lakes in Kenya through phylogenetic analysis based on 16S rRNA gene sequencing. Low levels of 16S rRNA sequence similarity with established species indicated that the strain halo-2T belonged to a novel taxonomic group, Salisedminibacterium halotolerans. In 2015, a novel strain belonging to the genus Salisediminibacterium was discovered in the Lonar soda lake in India. This strain is called Salisediminibacterium haloalkalitolerans, and is 99.9% related to Salisediminibacterium halotolerans (strain CGMCC).

Characteristics The Salisedminibacterium genus is characterized by rod-shaped cells inhabiting salt sediments. These bacteria are Gram-reaction-positive and are facultative anaerobes. Initially thought to be non-spore forming and non-motile, the genus is variably motile and may or may not form spores. The species halotolerans means that the strain halo-2T can withstand high salt concentrations. It can grow in a pH ranging from 5.0 to 10.0, but the optimal pH is 8–9. It can grow within a temperature range of 17 - 50 °C, but the optimal temperature is 37 °C.

Composition The fatty acids of the genus Salisediminibacterium mostly consist of anteiso-C15 : 0, anteiso-C17 : 0 and iso-C15 : 0. The cell-wall peptidoglycan contains the diagnostic diamino acid meso-diaminopimelic acid. The predominant menaquinone is MK-7. The polar lipids include four phospholipids (PL1, 3, 5 and 6) including diphosphatidylglycerol, phosphatidylethanolamine and phosphatidylglycerol and an unknown aminophospholipid (APL1). Strain halo-2T does not contain the catalase, oxidase, urease, or nitrate reductase enzymes, but does contain enzymes to hydrolyze starch. Its cell wall peptidoglycan contains meso-diaminopimelic acid and MK-7, the predominant menaquinone. The polar lipid profile of strain halo-2T consists of diphosphatidylglycerol, phosphatidylethanolamine and phosphatidylglycerol. The strain produces a water-insoluble orange pigment, with a major peak at 459 nm, and has a genomic DNA G+C content of 48.2 mol%.

References

Worked examples

Example 1 — a first encounter with Salisediminibacterium halotolerans

Start with the simplest possible case. Write down what Salisediminibacterium halotolerans claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Salisediminibacterium halotolerans before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Salisediminibacterium halotolerans ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Salisediminibacterium halotolerans

In research: Salisediminibacterium halotolerans appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Salisediminibacterium halotolerans in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Salisediminibacterium halotolerans is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bacillaceae, Bacillota stubs, Bacteria described in 2012, so understanding it makes those chapters shorter.
In everyday life: Look for Salisediminibacterium halotolerans outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Salisediminibacterium halotolerans in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Salisediminibacterium halotolerans means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Salisediminibacterium halotolerans out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Salisediminibacterium halotolerans in simple terms?

Why does Salisediminibacterium halotolerans matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Salisediminibacterium halotolerans?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Salisediminibacterium halotolerans.