Sustainable and rational management of agrophytocenoses depends on various bioindices and methods of application, particularly the development and protection of soil resources (Lai et al., 2002). Among other indices, enzyme activity is proposed as a universal index of soil fertility and contamination (Dilly et al., 2003). To ascertain and to make a comparison of bioactivity variation during the...

IT has long been recognized that most plant tissues have the capacity of inverting sucrose, but intensive study of saccharase action has hitherto been almost exclusively concerned with the saccharase of yeast [O'Sullivan & Tompson, 1890; Hudson, 1908, 1, 2; Michaeis & Menten, 1913; Nelson & Hitchcock, 1921; von Euler & Josephson, 1923; Willstatter & Kuhn, 1923; Weidenhagen, 1930, and many other...