Fig. 6From: Leaves play a central role in the adaptation of nitrogen and sulfur metabolism to ammonium nutrition in oilseed rape (Brassica napus)N source effect on SULTR1 and SULTR2 genes expression in roots (a) and leaves (b) of B. napus. Plants were hydroponically cultured with 1 mM nitrate or ammonium. Values represent mean ± SE (n = 4). Asterisk (*) indicates significant differences between nitrate and ammonium (P < 0.05)Back to article page