Question

In virus-infected plants the meristematic tissues in both apical and axillary buds are free of virus because

Answer 1

When plant breeders want to re-generate plants that are virus-free using asexual multiplication (in order to obtain clones of the primary unhealthy plant), they often collect the apical meristem from the infected plant, and cultivate it in appropriate media, so that a new, complete and virus-free plantlets develop. The fact that viruses spread systematically in the whole plant except the meristems when they colonize a new plant host, via phloem vascular element, is well known. But nothing is said about the putative molecular and cellular mechanisms that allow the pluripotent cells of the meristems to stay uninfected. 

Answer 2

Answer:

Answer: (c) In virus infected plants the meristematic tissues in both apical and axillary buds are free of virus because the multiplication ofmeristematic cells is faster than replication of viruses. The main reason behind it is the gene silencing.