Affiliation: | (1) Laboratory of Plant Physiology, Department of Biological Science, Higher Teachers’ Training College, University of Yaounde I, P.O. Box 47, Yaounde, Cameroon;(2) Biozentrum KleinFlottbek, Abteilung Nutzpflanzenbiologie, University of Hamburg, Ohnhorststrasse 18, 22609 Hamburg, Germany |