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We review the phenomenon of color coherence in quantum chromodynamics (QCD),its implications for hard and soft processes with nuclei, and its experimentalmanifestations. The relation of factorization theorems in QCD with colorcoherence phenomena in deep inelastic scattering (DIS) and color coherencephenomena in hard exclusive processes is emphasized. Analyzing numerically theQCD evolution equation for conventional and skewed parton densities in nuclei,we study the onset of generalized color transparency and nuclear shadowing ofthe sea quark and gluon distributions in nuclei as well as related phenomena.Such novel results as the dependence of the effective coherence length on $Q^2$and general trends of the QCD evolution are discussed. The limits of theapplicability of the QCD evolution equation at small Bjorken $x$ are estimatedby comparing the inelastic quark-antiquark- and two gluon-nucleon (nucleus)cross sections, calculated within the DGLAP approximation, with the dynamicalboundaries, which follow from the unitarity of the $S$ matrix for purely QCDinteractions. We also demonstrate that principles of color coherence play animportant role in the processes of soft diffraction off nuclei.Comment: 58 pages, 19 figures, Revtex. Minor editor's changes, final version  published in J.Phys. G27 (2001) R23-6

Colour coherent phenomena on nuclei and the QCD evolution equation