Nematode such as root knot nematodes and cyst nematode are
interaction with plant.
In the plant cell when the double stranded DNA of the plant
interact with dicer molecule. The dicer cleaves the dsDNA into
fragments. These fragments are called siRNA
When the nematodes in interaction with of plants they uptake
the si RNA molecule during feeding process from the feed tube
These siRNA molecule binds with the rna induce silencing
complex (RISC) of nematode and activate RISC
The RISC along with siRNA binds with the target mRNA
These complex binding activating RNAse and cleaves the
mRNA.
Thus, RNA interference causes the mRNA degradation and
silencing of the mRNA as mRNA can no longer synthesize the
protein.