biology

Roseburia

Roseburia is a biology 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 Roseburia rather than just read about it. In short: Roseburia is a genus of obligately anaerobic, butyrate-producing bacteria in the family Lachnospiraceae. Members of the genus occur in the gastrointestinal tracts of mammals, and several species are common constituents of the human gut microbiota.

Key takeaways

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

Reference excerpt

Roseburia is a genus of obligately anaerobic, butyrate-producing bacteria in the family Lachnospiraceae. Members of the genus occur in the gastrointestinal tracts of mammals, and several species are common constituents of the human gut microbiota. Cultured species are generally saccharolytic, motile rods that ferment carbohydrates and form butyrate as a major product.

Taxonomy The type species, Roseburia cecicola, was isolated from the cecum of a mouse. The generic name honours the American microbiologist Theodor Rosebury, who studied microorganisms associated with humans. The List of Prokaryotic names with Standing in Nomenclature recognizes nine species with validly published and correct names in the genus.

Biology and metabolism Described Roseburia cells are straight or slightly curved rods. Many strains are motile by means of multiple flagella. The Gram-stain reaction has been reported as positive, negative, or variable among cultured strains, despite the phylogenetic placement of the genus within the phylum Bacillota. Species differ in their capacity to use dietary carbohydrates. Comparative genomic analysis has identified differences in carbohydrate-active enzymes and biosynthetic pathways among species, which may contribute to their occupation of different ecological niches in the colon. Roseburia intestinalis, for example, can act as a primary degrader of dietary β-mannans, while Roseburia inulinivorans can use inulin. During carbohydrate fermentation, some strains consume acetate while producing butyrate. Butyrate is used as an energy source by colonic epithelial cells and participates in metabolic and immune signalling in the intestine.

Research Differences in the relative abundance of Roseburia have been reported in observational studies of inflammatory bowel disease, colorectal cancer, and metabolic disorders. R. intestinalis has been investigated as a potential live biotherapeutic. Administration of the bacterium reduced inflammatory pathology and altered immune responses in experimental models of colitis, but these findings were obtained in preclinical systems. The relative abundance of R. inulinivorans was positively associated with several measures of muscle strength in human cohorts. Oral supplementation with the species also increased forelimb grip strength in antibiotic-treated mice and was accompanied by changes in amino-acid availability, muscle metabolism, and muscle-fibre composition.

See also List of bacterial orders List of bacteria genera

References

Worked examples

Example 1 — a first encounter with Roseburia

Start with the simplest possible case. Write down what Roseburia claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, 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 Roseburia 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 Roseburia 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 Roseburia

In research: Roseburia appears in biology 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 Roseburia 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: Roseburia is common in secondary-school and first-year university syllabi. It links to neighbouring topics Anaerobes, Bacteria genera, Gut flora bacteria, so understanding it makes those chapters shorter.
In everyday life: Look for Roseburia 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 Roseburia in 20 minutes

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

Frequently asked questions

What is Roseburia in simple terms?

Why does Roseburia matter?

Because it connects several biology 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 Roseburia?

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 Roseburia.