  We study two important roles of miRNA as stress inducer and synchronizing
agent in regulating diffusively coupled genetic oscillators within stochastic
formalism and competition between them. We identify optimal value of coupling
constant at which the rate of synchronization is strongest, below this value
sychronizing activity dominates stress activity, and above it stress activity
destroys synchronizing pattern. The concentration of miRNA maintained in
individual oscillator modulates the synchronization activity achieved by
diffusing miRNA.
