Indirect heavy SUSY signals in Higgs and top decays

We summarize the recent results on the supersymmetric QCD radiative corrections, at the one-loop level, in Higgs and top quark decays, in the context of the Minimal Supersymmetric Standard Model and in the decoupling limit of very heavy SUSY particles. Special attention is devoted to the particular decays $h^0\to b \bar b$, $H^+\to t \bar b$, $H^0\to b \bar b$, $A^0\to b \bar b$ and $t \to H^+\bar b$ where the radiative corrections from heavy squarks and heavy gluinos do not decouple and are enhanced at large $\tan \beta$. Some interesting phenomenological consequences are also briefly summarized.