It can parasitize many host plants in different families. It is the valuable source for transmitting virus and prokaryotic. Pathogen between unrelated plant species .are the hosts which can not be grafted.
Experimentally useful method. Several plant viruses can be transmitted from one plant to another through the bridge formed between two plants by the twining stems of the parasitic plant dodder. Dodder plants are vines and are parasitic members of the family Convolvulaceae. The leafless stem of this plant wind around suitable plants, sending out haustoria's which connect with the vascular tissue of the host. Branches from the initial dodder stem entangle other plant and parasitize them. Virus can pass along the connecting dodder stem between plants.
POLLEN AND SEED TRANSMISSION
Many virus are transmitted through seeds .not all seeds on an infected plants contain virus. The extent of infected seeds can vary with the virus and its strain, host plant, stage of infection, severity of infection and environmental conditions.
A number of viruses have been shown to be seed-borne and are thus seed transmitted. The percentage of seeds carrying the virus is however small. Virus is mostly present in embryo, endosperm or non-embryo portion such as seed coat. Seed transmitted viruses are also spread by nematodes. Seed transmission provides an effective means of spread of the virus over long distances.
MATERIALS AND METHOD
Ø Virus infected plants
Ø Healthy plants
Ø Sterilized scalpel
Ø Scissor
Ø Para film tape
Ø Paper tags and strings
Ø Whitefly
Ø Cage
Ø Aspirator
Ø Surgical blade
No comments:
Post a Comment