chemistry

Terriglobus roseus

Terriglobus roseus is a chemistry 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 Terriglobus roseus rather than just read about it. In short: Terriglobus roseus is a bacterium belonging to subdivision 1 of the Acidobacteriota phylum, and is closely related to the genera Granulicella and Edaphobacter. T. roseus was the first species recognized in the genus Terriglobus in 2007.

Key takeaways

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

Reference excerpt

Terriglobus roseus is a bacterium belonging to subdivision 1 of the Acidobacteriota phylum, and is closely related to the genera Granulicella and Edaphobacter. T. roseus was the first species recognized in the genus Terriglobus in 2007. This bacterial species is extremely abundant and diverse in agricultural soils. T. roseus is an aerobic Gram-negative rod lacking motility. This bacteria can produce extracellular polymeric substances (EPS) to form a biofilm, or extracellular matrix, for means of protection, communication amongst neighboring cells, etc. Its type strain is KBS 63. As implied by its name, on solid media, the bacterial colonies produce a pink pigmentation, indicating the presence of carotenoids. T. roseus grows best at room temperature (23 °C) in a liquid media called R2B, containing peptone, casamino acids, yeast extract, glucose, soluble starch, sodium pyruvate and inorganic salts. Although T. roseus is found in soil and sediment environments, it is highly difficult to culture Acidobacteriota in lab settings. Currently, there is no sufficient growth media that allows for T. roseus to grow in soil. This species optimal pH for growth is pH6, however this species can survive in acidic conditions as low as pH 5.

Ecology T. roseus, common among all Acidobacteriota, is ubiquitous in soil environments with low nutrient availability, and are relatively wide-spread throughout the soil. Its high abundance in agricultural soils suggests that T. roseus plays a critical role in nutrient cycling. The ability for T. roseus to produce EPS serves many possible benefits to this bacteria and its surrounding environment. Production of biofilms can aid to protect T. roseus and other organisms inhabiting the extracellular matrix, collect water and nutrients for easier accessibility, and could potentially play a role in forming soil aggregates, which would allow for more flow of water and air through the biofilm community.

Metabolism T. roseus is an aerobic bacterium that is catalase positive and oxidase negative. Although these bacteria are aerobic, T. roseus is capable of surviving at atmospheric concentrations as low as 2% oxygen. These bacteria are chemo-organotrophs, meaning they create energy by oxidizing organic matter, making them versatile in terms of generating energy. T. roseus was found to oxidize glucose, fructose, galactose, mannose, xylose, sucrose, maltose, arabinose, cellobiose, and many more organic compounds. However, T. roseus is unable to utilize mannitol, carboxymethyl cellulose, sodium acetate, sodium pyruvate or monomers of lignin compounds. In lab culture, T. roseus has demonstrated an increase of growth correlating with several factors, including elevated carbon dioxide levels, decreased availability of nutrients and carbon sources, and additional polymeric substrates to induce growth and enzyme activity, like xylan and chitosan. T. roseus has a slow growth rate, suggesting these bacteria are oligotrophic microorganisms.

Genomic features The genome of T. roseus is nearly 5.25 million base pairs long with a 60% GC content. Its genome has an interestingly high percentage of repeat sequences at 18% of all DNA. T. roseus has two copies of its 16S ribosomal RNA, which is suggestive evidence that T. roseus is an oligotroph, in addition to its slow growth rate and low nutrient sources. Previous research has shown a correlation between the number of copies of the 16S rRNA and the relative metabolism of the organism. The low number of copies of 16S rRNA in T. roseus supports the slow growth rate of the bacteria. Although there has been an increase in research being performed on Acidobacteriota, more research is still needed to better understand how these bacteria, T. roseus in particular, contribute to the environment around them.

References

Illustrations

Worked examples

Example 1 — a first encounter with Terriglobus roseus

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

In research: Terriglobus roseus appears in chemistry 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 Terriglobus roseus 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: Terriglobus roseus is common in secondary-school and first-year university syllabi. It links to neighbouring topics Acidobacteriota, so understanding it makes those chapters shorter.
In everyday life: Look for Terriglobus roseus 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 Terriglobus roseus in 20 minutes

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

Frequently asked questions

What is Terriglobus roseus in simple terms?

Why does Terriglobus roseus matter?

Because it connects several chemistry 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 Terriglobus roseus?

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 Terriglobus roseus.