The production of Higgs boson at Tevatron by gluon fusion, can be enhanced by the presence of heavy colored particles that receive their mass from the SM Higgs. This can be used to constraint additional standard or mirror families, chiral colored sextets and octet quarks. The possibility to detect the lepton-flavor violating Higgsh→&tgr;&mgr;/&tgr;e,at the first stages of RUN-II is also discussed. ©2001 American Institute of Physics.