biology

Volvariella volvacea

Volvariella volvacea 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 Volvariella volvacea rather than just read about it. In short: Volvariella volvacea (also known as paddy straw mushroom or straw mushroom) is a species of edible mushroom cultivated throughout East and Southeast Asia and used extensively in Asian cuisine. They are often available fresh in regions where they are cultivated, but elsewhere are more frequently found canned or dried.

Key takeaways

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

Reference excerpt

Volvariella volvacea (also known as paddy straw mushroom or straw mushroom) is a species of edible mushroom cultivated throughout East and Southeast Asia and used extensively in Asian cuisine. They are often available fresh in regions where they are cultivated, but elsewhere are more frequently found canned or dried. Worldwide, straw mushrooms are the third-most-consumed mushroom.

Description In their button stage, straw mushrooms resemble poisonous death caps, but can be distinguished by several mycological features, including their pink spore print (spore prints of death caps are white). The two mushrooms have different distributions, with the death cap generally not found where the straw mushroom grows natively, but immigrants, particularly those from Southeast Asia to California and Australia, have been poisoned due to misidentification.

Uses Straw mushrooms are grown on rice straw beds and are most commonly picked when immature (often labelled "unpeeled"), during their button or egg phase, and before the veil ruptures. They are adaptable, taking four to five days to mature, and are most successfully grown in subtropical climates with high annual rainfall. No record has been found of their cultivation before the 19th century.

Broth In the finishing and aging process of making dark soy sauce, the broth of straw mushrooms can be mixed into the soy sauce, which is then exposed to the sun to make mushroom dark soy sauce (草菇老抽 cǎogū lǎochōu). The added broth gives this soy sauce a richer flavor than plain dark soy sauce.

Nutrition One cup (182 grams or 6.4 ounces) of straw mushrooms is nutritionally dense and provides 240 kilojoules (58 kilocalories) of food energy, 27.7 μg selenium (50.36% of RDA), 699 mg sodium (46.60%), 2.6 mg iron (32.50%), 0.242 mg copper (26.89%), 69 μg vitamin B9 (folate) (17.25%), 111 mg phosphorus (15.86%), 0.75 mg vitamin B5 (pantothenic acid) (15.00%), 6.97 g protein (13.94%), 4.5 g total dietary fiber (11.84%), and 1.22 mg zinc (11.09%).

References

External links

Media related to Volvariella volvacea at Wikimedia Commons Straw Mushroom http://www.indexfungorum.org/Names/SynSpecies.asp?RecordID=307802 Archived 2007-10-10 at the Wayback Machine http://www.indexfungorum.org/Names/NamesRecord.asp?RecordID=307802 https://doi.org/10.1016/j.jfma.2019.09.008

Illustrations

Worked examples

Example 1 — a first encounter with Volvariella volvacea

Start with the simplest possible case. Write down what Volvariella volvacea 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 Volvariella volvacea 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 Volvariella volvacea 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 Volvariella volvacea

In research: Volvariella volvacea 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 Volvariella volvacea 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: Volvariella volvacea is common in secondary-school and first-year university syllabi. It links to neighbouring topics Chinese edible mushrooms, Fungi described in 1786, Fungi in cultivation, so understanding it makes those chapters shorter.
In everyday life: Look for Volvariella volvacea 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 Volvariella volvacea in 20 minutes

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

Frequently asked questions

What is Volvariella volvacea in simple terms?

Why does Volvariella volvacea 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 Volvariella volvacea?

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 Volvariella volvacea.