biology

Olpidium

Olpidium 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 Olpidium rather than just read about it. In short: Olpidium is a fungal genus in the family Olpidiaceae. Members of Olpidium are zoosporic pathogens of plants, animals, fungi, and oomycetes.

Key takeaways

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

Reference excerpt

Olpidium is a fungal genus in the family Olpidiaceae. Members of Olpidium are zoosporic pathogens of plants, animals, fungi, and oomycetes.

Morphology Olpidium species exist as spherical zoosporangia inside the cells of their host. Zoospores emerge from a single discharge tube and have a single, posterior whiplash flagellum. Resting spores can be smooth or ornamented.

Ecology Olpidium species infect a wide variety of plants, animals, protists, and fungi and are fairly common in aquatic and terrestrial ecosystems. Most of what is known about the genus comes from those species that infect higher plants, especially crops. In higher plants, infection with Olpidium often causes little to no symptoms. An exception is Olpidium viciae, which causes broadbean blister. However, Olpidium species can vector plant viruses. For example, Olpidium brassicae transmits big-vein virus and big-vein associated varicosavirus among lettuce plants, and transmits tobacco mosaic virus among tobacco plants. Olpidium bornovanus or Olpidium cucurbitacearum serves as a vectors for a number of curcubit viruses.

Taxonomy The genus Olpidium was placed in the Olpidiaceae in the Chytridiales. Later some species, notably O. brassicae, were moved to the genus Pleotrachelus, but these were later moved back into the genus. Based on zoospore ultrastructure, Donald J. S. Barr moved the genus into Spizellomycetales In studies using molecular phylogenetics, O. brassicae, O. virulentus, and O. bornovanus were found to cluster with members of the former Zygomycota not with members of Chytridiomycota. One researcher, has elevated Olpidium to the level of phylum (Olpidiomycota) and split the genus into several genera. While nomenclaturaly valid and accepted by some researchers, others view these changes as controversial and unsupported.

References

External links Index Fungorum

Illustrations

Worked examples

Example 1 — a first encounter with Olpidium

Start with the simplest possible case. Write down what Olpidium 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 Olpidium 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 Olpidium 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 Olpidium

In research: Olpidium 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 Olpidium 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: Olpidium is common in secondary-school and first-year university syllabi. It links to neighbouring topics Chytridiomycota genera, Fungus stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Olpidium 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 Olpidium in 20 minutes

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

Frequently asked questions

What is Olpidium in simple terms?

Olpidium is a fungal genus in the family Olpidiaceae. Members of Olpidium are zoosporic pathogens of plants, animals, fungi, and oomycetes.

Why does Olpidium 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 Olpidium?

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 Olpidium.