Planetagarden
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.
- Which virus causes potato spindle tuber disease?
- Who discovered viroids?
- What is the meaning of Viroids?
- What happens in potato spindle tuber disease?
- Is Viroids smaller than virus?
- What diseases are caused by Viroids?
- Which plant virus is Gemini virus?
- Who gave the term virus?
Which virus causes potato spindle tuber disease?
The Potato spindle tuber viroid ("PSTVd") was the first viroid to be identified.
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| Potato spindle tuber viroid | |
|---|---|
| Virus classification | |
| Family: | Pospiviroidae |
| Genus: | Pospiviroid |
| Species: | Potato spindle tuber viroid |
Who discovered viroids?
The pathogen is called a viroid by its discoverer, Dr. Theodor 0. Diener, to distinguish it from a virus.
What is the meaning of Viroids?
Viroid, an infectious particle smaller than any of the known viruses, an agent of certain plant diseases. The particle consists only of an extremely small circular RNA (ribonucleic acid) molecule, lacking the protein coat of a virus. ... Whether viroids occur in animal cells is still uncertain.
What happens in potato spindle tuber disease?
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.
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.
What diseases are caused by Viroids?
The only human disease known to be caused by a viroid is hepatitis D. This disease was previously ascribed to a defective virus called the delta agent. However, it now is known that the delta agent is a viroid enclosed in a hepatitis B virus capsid.
Which plant virus is Gemini virus?
Geminiviruses (family Geminiviridae) are small single-stranded (ss) DNA viruses infecting plants. Their virion morphology is unique in the known viral world – two incomplete T = 1 icosahedra are joined together to form twinned particles. Geminiviruses utilize a rolling-circle mode to replicate their genomes.
Who gave the term virus?
In 1892, Dmitri Ivanovsky used one of these filters to show that sap from a diseased tobacco plant remained infectious to healthy tobacco plants despite having been filtered. Martinus Beijerinck called the filtered, infectious substance a "virus" and this discovery is considered to be the beginning of virology.
