science

Nasuia deltocephalinicola

Nasuia deltocephalinicola 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 Nasuia deltocephalinicola rather than just read about it. In short: "Candidatus Nasuia deltocephalincola" was reported in 2013 to have the smallest genome of all bacteria, with 112,091 nucleotides. For comparison, the genome of Escherichia coli has 4.6 million nucleotides.

Key takeaways

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

Reference excerpt

"Candidatus Nasuia deltocephalincola" was reported in 2013 to have the smallest genome of all bacteria, with 112,091 nucleotides. For comparison, the genome of Escherichia coli has 4.6 million nucleotides. The second smallest genome, from bacteria Tremblaya princeps, has 139,000 nucleotides. While N. deltocephalinicola has the smallest number of nucleotides, it has more protein-coding genes (137) than some bacteria.

Symbiotic relationship Nasuia deltocephalinicola was discovered when leafhoppers and other phloem- and xylem-feeding insects were investigated for endosymbiotic bacteria. The phloem and xylem of plants are rich in carbohydrates (in the form of sucrose) but lack lipids and proteins. Lipids can be synthesized from carbohydrates; however, proteins require nitrogen, which is not commonly found in plant sap. Nasuia deltocephalinicola along with other bacterial endosymbionts help the insects by synthesizing 10 essential amino acids that they would not otherwise have. The only insects that can benefit from this relationship are those from the suborder Sternorrhyncha, which feed off phloem, and those from the suborder Auchenorrhyncha, which feed off xylem. Nasuia deltocephalinicola can synthesize two of the essential amino acids that these insects require. This bacterium uses the UGA codon in its DNA to specify tryptophan instead of the stop as in most other organisms. The symbiotic relationship between N. deltocephalinicola and leafhoppers is proposed to have started at least 200 million years ago, when leafhoppers and spittlebugs diverged evolutionarily. This claim is supported by the fact that N. deltocephalinicola's closest bacterial relative is Zinderia insecticola, which plays the same role for spittlebugs as N. deltocephalinicola does in leafhoppers. Leafhoppers return the favor by providing shelter in the form of a specialized organ in their abdominal cavity called a bacteriome, which they have on both sides of their abdomens. Many types of bacteria can reside in these organs, though the bacteria are completely separated from each other and reside in different sections of the bacteriome. Nasuia deltocephalinicola is an obligate endosymbiont—it cannot thrive without being in a leafhopper. It is an intracellular endosymbiont, living within bacteriocytes, cells that are specialized for housing endosymbiotic bacteria. These bacteriocytes comprise an organ called a bacteriome, whose cells host a variety of bacterial endosymbionts. Intracellular endosymbionts may evolve to depend on the host cells for essential cellular functions. As a result, their genomes often lack genes that would be required for life in an extracellular environment, even one containing abundant nutrients. They have thereby begun the process of evolving from a free-living organism to an intracellular organelle. Nasuia deltocephalinicola also no longer has genes needed to synthesize ATP through oxidative phosphorylation. It is proposed that this is because of the high sucrose concentration found in xylem and phloem of plants.

Worked examples

Example 1 — a first encounter with Nasuia deltocephalinicola

Start with the simplest possible case. Write down what Nasuia deltocephalinicola 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 Nasuia deltocephalinicola 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 Nasuia deltocephalinicola 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 Nasuia deltocephalinicola

In research: Nasuia deltocephalinicola 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 Nasuia deltocephalinicola 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: Nasuia deltocephalinicola is common in secondary-school and first-year university syllabi. It links to neighbouring topics Betaproteobacteria, Candidatus taxa, so understanding it makes those chapters shorter.
In everyday life: Look for Nasuia deltocephalinicola 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 Nasuia deltocephalinicola in 20 minutes

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

Frequently asked questions

What is Nasuia deltocephalinicola in simple terms?

Why does Nasuia deltocephalinicola 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 Nasuia deltocephalinicola?

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 Nasuia deltocephalinicola.