1. Cytochemistry analysis demonstrated that the laser mierobeam irradiation can destruct both nucleolar DNA and RNA without any vital staining.

2. New arrangements of microtubules and actin filaments in coleoptile cells of barley that had been inoculated with either a nonpathogen, Erysiphe pisi, or a pathogen, E. graminis, were observed by cytochemistry and confocal laser scanning microscopy.