Give a brief account of pest resistant in plants.

Explanation

Pest resistant plants are developed by using biotechnology processes:
i) A nematode Meloidegyne incognitia infects the roots of tobacco plants which reduces the production of tabacoo.
ii) RNA interference (RNA i) process is used to check by silencing to specific mRNA due to a complementary ds RNA. It occurs in all eukaryotic organisms as a method of cellular defense,
iii) ds RNA binds and prevents translation of the mRNA (silencing).
iv) Agrobacterium vectors are used to introduce - specific genes into the host plant. It produces both sense and anti sense RNA in the host cells.
v) These two RNAs are complementary to each other and forms . a double stranded RNA (ds RNA) that initiate RNAi and hence silence the specific mRNA of the nematode..
vi) The parasite cannot survive in transgenic-host, so prevents the plants from pest. The transgenic plant, thus gets itself protected from the parasite.