science

Halorhodospira neutriphila

Halorhodospira neutriphila 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 Halorhodospira neutriphila rather than just read about it. In short: Halorhodospira neutriphila is a bacterium from the genus of Halorhodospira which has been isolated from a microbial mat from a marine saltern from Rhone Delta in France. The microbial mat forms at the sediment surface and is between 10 and 20 mm thick, below a fine layer (2–3 cm) of gypsum crust.

Key takeaways

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

Reference excerpt

Halorhodospira neutriphila is a bacterium from the genus of Halorhodospira which has been isolated from a microbial mat from a marine saltern from Rhone Delta in France. The microbial mat forms at the sediment surface and is between 10 and 20 mm thick, below a fine layer (2–3 cm) of gypsum crust. The mat is composed of a red layer of purple bacteria strains below a green layer of cyanobacteria, interspersed with sulfur globules, and occasionally covered by halite deposits. These mat forming microbes live in anoxic muds and sediments and form a benthic mat in a hypersaline lagoon environment where the salinity of the water ranges from 240-320‰ of total salinity. H. neutriphila was isolated from the red layer of the microbial layer and found to be extremely halophilic and well adapted to withstand the extreme saline conditions of their modified marine habitat. The type strain was identified as strain SG 3301T.

Phenotypic Characteristics H. neutriphila is a phototrophic, purple bacteria with a spirilloid morphology and motile with polar flagella. This species of bacteria is gram negative and the cell size ranges (width by length) from 1-1.2 μm x 2-5 μm. H. neutriphila has a photosynthetic intracellular membrane system that consists of lamellar stacks with spirilloxanthin and BChl a as the major carotenoids.

Optimal Growth Optimal growth for H. neutriphila occurs with a 9-12% (w/v) NaCl presence in culture and a medium supplemented with 1mM Na2S.9H20, 2mM acetate, 1mM succinate, and 0.05% yeast extract. Their metabolism is most efficient with sulfide and acetate as electron donors and CO2 as the carbon source. Maximum growth occurs at a pH range of 6.8 - 7 at 30-35 °C under a light intensity of 5000 lux with a 16h:8h light to dark cycle. The growth rate for the type strain is recorded to be 0.034 h^ -1 and cell replication occurs through binary fission.

Genetic Characteristics The composition of DNA bases for the type strain is 74.5 mol% G+C. The 16S rDNA gene, with a partial genome length of 1357 base pairs, was used to determine the relatedness of the H. neutriphila type strain to other strains, including SG 3304 with which it shares 100% homology. The type strain was closely related to the species Rhodovibrio sodomensis with 98.8% homology and Halorhodospira halophila with 94.6% homology. The strains SG 3301T and SG 3304 were determined to be genetically, morphologically, and physiologically different enough from other species in the genus Halorhodospira to be classified as a new species; they were named Halorhodospira neutriphila sp. nov.

References

External links microbewiki Halorhodospira halophila

Worked examples

Example 1 — a first encounter with Halorhodospira neutriphila

Start with the simplest possible case. Write down what Halorhodospira neutriphila 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 Halorhodospira neutriphila 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 Halorhodospira neutriphila 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 Halorhodospira neutriphila

In research: Halorhodospira neutriphila 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 Halorhodospira neutriphila 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: Halorhodospira neutriphila is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bacteria described in 2003, Chromatiales, Halophiles, so understanding it makes those chapters shorter.
In everyday life: Look for Halorhodospira neutriphila 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 Halorhodospira neutriphila in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Halorhodospira neutriphila 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 Halorhodospira neutriphila out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Halorhodospira neutriphila in simple terms?

Why does Halorhodospira neutriphila 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 Halorhodospira neutriphila?

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 Halorhodospira neutriphila.