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Virus infected beanstalk
What they are - biological definition
Plant viruses are microscopic infectious agents that affect plants and can cause plant viruses. These viruses parasitize plants, multiply and can cause them to die.
These viruses are highly harmful to agriculture as they cause damage by killing plants or making the fruits unfit for consumption.
- Most plant viruses have RNA as genetic material.
- They have the ability to cause growth to decrease in plants.
Virus transmission between plants
- These viruses can be transmitted from plant to plant through insects, phytopathogenic nematodes and fungi (endoparasites present in the soil).
Grafting is also a way of viral transmission between plants.
- Physical contact between roots and leaves of a healthy infected plant.
- Although less common, virus transmission can also occur through pollen or seed from diseased plants.
Examples of plant viruses:
- Citrus sadness - mainly affects the orange groves, causing plant rot.
- Leprosis - affects feet of orange, lemon and other trees that yield citrus fruits.
- Tobacco Mosaic - hits tobacco feet.
- Shorty - virus that reaches the feet of peppers and tomatoes.
- Pinta Verde - plant pathology that affects the passion fruit.
- Turn - virus that hits the tomatoes.
- Lethal Yellow - disease caused by PLYV virus in papaya.
- Phytopathology is the area of botany that studies plant diseases.
- In addition to viruses, fungi, bacteria and insects can cause plant disease.
- One of the leading plant virologists in history was the American scientist Wendell Stanley. He won the Nobel Prize in Chemistry in 1946, after conducting research and making important discoveries about the tobacco mosaic virus.