Institution: | (1) Laboratorium voor Teeltfysiologie en Tropische Fytotechnie, Katholieke Universiteit Leuven, Kardinaal Mercierlaan 92, B-3030 Leuven, Belgium;(2) Present address: Centre of Advance Study in Cell and Chromosome Research, Department of Botany, University of Calcutta, 35 Ballygunge Circular Road, 700019 Calcutta, India |