A rapid and highly sensitive method for measuring enzyme activities in single mycorrhizal tips using 4-methylumbelliferone labelled fluorogenic substrates in a microplate system. - Pritsch,K..; Raidl,S..; Marksteiner,E..; Blaschke,H..; Agerer,R..; Schloter,M..; Hartmann,A.. (Journal of Microbiological Methods, 2004)