Viroids Flashcards
1
Q
Morphology
A
- mw.: 50.000-100.000 Da.
- circular +ssRNA – superhelical
- no structural proteins!
2
Q
Resistance
A
extremely strong
• 100 °C, 30 min, UV and gamma radiation, disinfectants – no effect
3
Q
Biological properties
A
- plant pathogens – only in cultivated plants
- infection – gardening tools, injuries – mechanical transmission
- host spectrum: varies, no orphan viroid
4
Q
Antigenic properties
A
not antigenic
5
Q
Diagnosis
A
- Potato spindle tuber viroid - shape of the potato (pointy)
- Hop stunt viroid
- Coconut cadang-cadang viroid
