Affiliation: | (1) Lehrstuhl fur Allgemeine Botanik, Ruhr-Universität Bochum, Postfach 102148, D-4630 Bochum 1, FRG;(2) Present address: MSU-DOE Plant Res. Laboratory, Michigan State University, East Lansing, Michigan, USA;(3) Present address: TU Berlin, FB 13, Mikrobiologie, Seestr. 13, D-1000 Berlin 65 |