How does rna interference help in developing resistance in tobacco plant against nematode infection?
Answers
A nematode Meloidegyne incognitia infects the roots of tobacco plants which reduce the production of tobacco. The infection can be prevented using RNA interference (RNAi) process which is checked by silencing of specific mRNA due to a complementary ds RNA. The ds RNA binds and prevents translation of the mRNA. By using Agrobacterium vectors, nematode-specific genes were introduced into the host plants which produce both sense and antisense RNA in the host cells. These two RNAs are complementary to each other and form a double stranded RNA (ds RNA) that initiates RNAi and hence, silences the specific mRNA of the nematode. The parasite cannot survive in transgenic host and so, prevents the plants from pests.
Rna interference help in developing resistance in tobacco plant against nematode infection as ds RNA combines with it and prevents the translation of mRNA.
EXPLANATION:
The most important insect that affects the root of tobacco plant is a type of nematode named Meloidegyne incognita. It also affects its production. The use of agro bacterium vector, some of the genes are inserted in the tobacco plant which results in antisense and sense RNA in the host cell. They are opposite to each other. The parasite cannot survive in that condition. Therefore, the plant is saved from the parasite.