...WJ Davies (1987), J. Exp. Bot., 38, 1174-1181. Zhong, H. and A. Laudili (1994), Planta, ¡94, 34-41. Zimmermann, U.. JJ Zhu, FC Meinzer, G. Goldstein,...Thürmer, P. Melcher, D. Webb, and A. Haase (1994), Bot. Acta, 107, 8 Trace Metals MNV Prasad INTRODUCTION Trace metals, namely, Al, As, Cd, Co, Cr, Cu,...