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- What pathogen causes potato spindle tuber viroid?
- What causes potato spindle tuber disease?
- Which disease occur by Viroids in potato and Human respectively?
- Is Potato spindle tuber viroid a virus?
- Is Viroids smaller than virus?
- Is Potato spindle tuber disease caused by prions?
- Which of the following is not correct for the agent which is responsible for potato spindle tuber disease?
- Who discovered viroid?
- Do potatoes get viruses?
- How can prions be destroyed?
- How is the potato virus transmitted?
What pathogen causes potato spindle tuber viroid?
Potato Spindle Tuber Viroid (PSTVd) is an EU listed quarantine pathogen of potatoes which causes stunting of the plant and malformation and cracking of tubers. The main host is potatoes but the disease also affects tomatoes and solanaceous ornamentals.
What causes potato spindle tuber disease?
In 1971, studies of the potato spindle tuber disease showed that it was caused by a small, naked, single-stranded, circular molecule of infectious RNA, which was called a viroid (see later). Viroids have been found to be the cause of several dozen plant diseases.
Which disease occur by Viroids in potato and Human respectively?
Of the many diseases caused by viroids, the spindle tuber disease of potatoes was the first to be recognized and studied by plant pathologists.
Is Potato spindle tuber viroid a virus?
The potato spindle tuber viroid (PSTVd) was the first viroid to be identified. PSTVd is a small, single stranded circular RNA molecule closely related to the chrysanthemum stunt viroid.
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| Potato spindle tuber viroid | |
|---|---|
| Virus classification | |
| Family: | Pospiviroidae |
| Genus: | Pospiviroid |
| Species: | Potato spindle tuber viroid |
Is Viroids smaller than virus?
Viroids are plant pathogens: small, single-stranded, circular RNA particles that are much simpler than a virus. They do not have a capsid or outer envelope, but, as with viruses, can reproduce only within a host cell. Viroids do not, however, manufacture any proteins.
Is Potato spindle tuber disease caused by prions?
- The disease of the potato spindle tuber is not caused by viruses, prions, or bacteria. Thus, the correct answer is option (B) Viroid.
Which of the following is not correct for the agent which is responsible for potato spindle tuber disease?
Potato spindle tuber disease is not caused by prions, virus and bacteria.
Who discovered viroid?
The pathogen is called a viroid by its discoverer, Dr. Theodor 0. Diener, to distinguish it from a virus.
Do potatoes get viruses?
Potatoes can be infected by many different viruses that can reduce yield and tuber quality. Virus diseases can often be diagnosed by mosaic patterns on leaves, stunting of the plant, leaf malformations, and tuber malformations.
How can prions be destroyed?
They can be frozen for extended periods of time and still remain infectious. To destroy a prion it must be denatured to the point that it can no longer cause normal proteins to misfold. Sustained heat for several hours at extremely high temperatures (900°F and above) will reliably destroy a prion.
How is the potato virus transmitted?
Disease Spread
PVY is spread naturally in a non-persistent manner by many aphid species, and can be mechanically transmitted. Virus is transmitted when an aphid initially probes the plants.
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