What are Propagative viruses?
Circulative, Propagative Transmission. Circulative, propagative viruses are characterized by replication and systemic invasion of vector insect tissues prior to transmission via salivary glands (Figure 1D) [2,4].
What are Circulative viruses?
Circulative, non-propagative:The virus circulates up through the food canal and cross the midgut and hindgut reaching the hemocoel. Then virus particles cross accessory salivary glands and return to the plant via the saliva canal.
What is an example of a plant virus?
Tomato spotted wilt virus
Cauliflower mosaic virusBrome mosaic virus
Plant virus/Representative species
The Top 10 list includes, in rank order, (1) Tobacco mosaic virus, (2) Tomato spotted wilt virus, (3) Tomato yellow leaf curl virus, (4) Cucumber mosaic virus, (5) Potato virus Y, (6) Cauliflower mosaic virus, (7) African cassava mosaic virus, (8) Plum pox virus, (9) Brome mosaic virus and (10) Potato virus X, with …
What is Propagative?
[ prŏp′ə-gā′tĭv ] adj. Of, relating to, or involved in propagation. Relating to the germ cells of an animal or plant as distinguished from the somatic cells.
Which is the smallest plant virus?
Tobacco virtovirus 1 is a small, icosahedral plant virus which worsens the symptoms of infection by Tobacco mosaic virus (TMV)….
| Tobacco virtovirus 1 | |
|---|---|
| Realm: | Riboviria |
| Phylum: | incertae sedis |
| Genus: | Virtovirus |
| Species: | Tobacco virtovirus 1 |
What is Propagative transmission?
Propagative: When the disease agent undergoes no cyclical change but multiplies in the body of the vector, transmission is said to be propagative, e.g. plague bacilli in rat fleas.
Can plant viruses infect humans?
It is currently accepted that a strict separation exists between plant and vertebrate viruses regarding their host range and pathogenicity, and plant viruses are believed to infect only plants. Accordingly, plant viruses are not considered to present potential pathogenicity to humans and other vertebrates.
Which is the largest plant virus?
Molecular Biology of Potyviruses Potyvirus is the largest genus of plant viruses causing significant losses in a wide range of crops.
What is propagative material?
Propagative materials means dormant cuttings, green cuttings, buds, budsticks, graftsticks, or seeds taken from a tree.
Which is the largest virus?
Mimivirus is the largest and most complex virus known.
What is a Propagative vector?
Propagative Transmission. The parasite multiplies within the vector without any cyclical changes, i.e., the parasite increases in number within the vector but does not undergo any developmental changes.
How are plant viruses pathogenic to higher plants?
Plant viruses can be pathogenic to higher plants . Most plant viruses are rod-shaped, with protein discs forming a tube surrounding the viral genome; isometric particles are another common structure. They rarely have an envelope.
Are there any viruses that can replicate in plants?
One class of viruses, the Rhabdoviridae, has been proposed to actually be insect viruses that have evolved to replicate in plants. The chosen insect vector of a plant virus will often be the determining factor in that virus’s host range: it can only infect plants that the insect vector feeds upon.
How are plant viruses transmitted from one cell to another?
To transmit from one plant to another and from one plant cell to another, plant viruses must use strategies that are usually different from animal viruses. Most plants do not move, and so plant-to-plant transmission usually involves vectors (such as insects).
Which is an example of a non persistent plant virus?
Current evidence suggests that non-persistent plant viruses (Figure 1A) employ one of two mechanisms of transmission: capsid-only or helper-dependent [1,2,5,6]. As an example for capsid-only mechanism, cucumber mosaic virus (CMV) particles, but not isolated viral RNA, were shown to be transmissible by the aphid Myzus persicae[8].