biology

Peanut stunt virus

Peanut stunt virus 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 Peanut stunt virus rather than just read about it. In short: Peanut stunt virus (PSV) is a plant pathogenic virus in the family Bromoviridae. It is a member of the genus Cucumovirus.

Key takeaways

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

Reference excerpt

Peanut stunt virus (PSV) is a plant pathogenic virus in the family Bromoviridae. It is a member of the genus Cucumovirus. The members of this genus are positive-stranded RNA viruses with a multipartite genome (3–4 parts). The virus particles have an isometric or spherical shape.

Distribution and host range PSV was first named as a new disease of groundnuts or peanuts ( Arachis hypogaea ) in 1966. Disease symptoms on the above ground parts of the peanut plants were described as severe dwarfing or stunting – hence the name Peanut stunt virus. Fruit production was also severely reduced. Virginia peanut fields, where this disease was first observed in 1964, had yield reductions of 10–50%. Severe stunting of peanuts had also been observed in North Carolina in 1964. The peanut disease in N. Carolina was reported to be caused by the PSV in 1967. The later report also stated that this virus caused disease in bean (Phaseolus vulgaris) and in white clover (Trifolium repens). After its first description, PSV was quickly diagnosed in beans in Washington State, white clover in South Carolina, peanuts, beans and white clover in Georgia, peanuts in Alabama, and white clover in Florida. Strains of PSV have now been identified in Africa (Morocco), Europe (France, Poland, Russia, and Spain) and Asia (India, Japan, Korea and China) as well as in the United States. PSV is an economically important pathogen of plants in the family Leguminosae. In addition to beans, peanuts, and clover (7 different species of Trifolium), PSV has been reported to naturally infect peas (Pisum sativum), soybeans (Glycine max), alfalfa (Medicago sativa) and lupine (Lupinus luteus). In 2002, PSV was reported to infect rhizoma or perennial peanut (Arachis glabrata) in N. Florida and S. Georgia. Host range studies have shown that fourteen other plant families can be infected with this virus including agriculturally important crops in the plant families Cucurbitaceae (squash, cucumber, watermelon) and Solanaceae (tomatoes, peppers, tobacco). Cultivated Tobacco (Nicotiana tabacum) and celery (Apium graveolens) have also been reported to be naturally infected.

Transmission PSV is transmitted from plant to plant by several species of aphids (Aphis craccivora, A. spiraecola and Myzus persicae) in a stylet-borne manner. It can also be transmitted by mechanical inoculation. It has been shown to be transmitted by seeds in peanuts at a very low level but this is not considered to be very important to the spread of this virus. The virus can be introduced into a susceptible field crop by aphids from a nearby reservoir (infected perennial hosts like clover, alfalfa or perennial peanuts) and then is spread further into the field by aphids. It can be spread in perennial crops by harvesting (mechanical transmission) and possibly by root grafts.

Diagnosis Correct diagnosis of any plant disease requires some expertise. Plants suspected of a viral infection should be sent to a plant diagnostic laboratory where the presence or absence of the virus can be confirmed by serological (ELISA), genetic (PCR), or host range tests. Antiserum and sequence data are available for this virus.

Other references for Peanut stunt virus in perennial peanuts Blount, A.R., R.K. Sprenkel, R.N. Pittman, B.A. Smith, R.N. Morgan. W. Dankers, and T.M. Momol 2002. Peanut Stunt Virus Reported on Perennial Peanut in North Florida and Southern Georgia. IFAS Pub. SS-AGR-37 Archived 14 October 2008 at the Wayback Machine Baker, C. A. Blount and K. Quesenberry 1999. Peanut Stunt Virus Infecting Perennial Peanuts in Florida and Georgia. Division of Plant Industry, Gainesville Fl. Circular 395 Archived 15 October 2014 at the Wayback Machine Peanut Stunt Virus in Perennial Peanuts : Symptoms and Inclusions Archived 15 October 2014 at the Wayback Machine "Peanut Stunt Virus (Cucumovirus PSV )". 3 August 2007. IPM images:leaf symptoms of PSV in perennial peanuts

References

External links ICTVdB ICTVdB – The Universal Virus Database: Peanut stunt virus Archived 4 August 2007 at the Wayback Machine Plant Viruses Online – Peanut stunt cucumovirus Archived 15 December 2008 at the Wayback Machine "The Big Picture Book of Viruses – Baltimore Listing". Archived from the original on 30 March 2013. Retrieved 22 July 2007.

Worked examples

Example 1 — a first encounter with Peanut stunt virus

Start with the simplest possible case. Write down what Peanut stunt virus 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 Peanut stunt virus 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 Peanut stunt virus 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 Peanut stunt virus

In research: Peanut stunt virus 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 Peanut stunt virus 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: Peanut stunt virus is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bromoviridae, Soybean diseases, Viral plant pathogens and diseases, so understanding it makes those chapters shorter.
In everyday life: Look for Peanut stunt virus 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 Peanut stunt virus in 20 minutes

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

Frequently asked questions

What is Peanut stunt virus in simple terms?

Peanut stunt virus (PSV) is a plant pathogenic virus in the family Bromoviridae. It is a member of the genus Cucumovirus.

Why does Peanut stunt virus 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 Peanut stunt virus?

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 Peanut stunt virus.