Imaging plays a unique role in fungal cell biology and phytopathology by al
lowing for the documentation of molecular structure in individual fixed and
living cells. Advances in fluorescence laser techniques, including confoca
l and multiphoton microscopy, are opening new avenues for cellular explorat
ion. These techniques hold tremendous potential for studies of host-pathoge
n interactions including the use of genetically encoded markers such as gre
en fluorescent protein, in situ hybridization and fluorescence resonance en
ergy transfer.