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The aim of this work is to show that the origin of the Fundamental Plane (FP)relation for early-type galaxies (ETGs) can be traced back to the existence ofa fine-tuning between the average star formation rate $<SFR>$ of galaxies andtheir structural and dynamical characteristics. To get such result it isnecessary to imagine the existence of two distinct "virtual planes" for eachgalaxy in the $\log(R_e)-\log(I_e)-\log(\sigma)$ space. The first one (namedVirial Plane VP) represents the total galaxy mass using the scalar VirialTheorem and the mass-to-light ratio $M/L$, while the second plane comes from anexpression of the total galaxy luminosity as a function of the mean starformation rate $<SFR>$ and the velocity dispersion $\sigma$, through a relation$L=L'_0 \sigma^{-2}$ (named here pseudo-Faber-Jackson (PFJ)) which is amathematical convenient way for expressing the independency of light from thevirial equilibrium. Its validity can be connected to the mutual correlation$L\sim\sigma\sqrt{<SFR>}$ observed for all ETGs.  A posteriori it is possible to see that this approach permits to explain theobserved properties of the FP (tilt and scatter) and the Zone of Exclusions(ZOE) visible in the FP projections. Furthermore, the link between theproperties of the FP and the SFR of galaxies provides a new idea of the starformation, as a phenomenon driven by the initial conditions of proto-galaxiesand regulated across the whole cosmic history by the variation of the maingalaxy parameters (mass, luminosity, structural shape and velocity dispersion).

On the origin of the Fundamental Plane and Faber-Jackson relations: consequences for the star formation problem