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Effects of addition of 1% glucose on putative LpCKX and LpRR gene expression in plants grown in 5 mM NO3–, 48 h after defoliation. Each data point is normalized against the reference genes eEF-1α and GAPDH. Values are means ±SE (n=3 pools of five plants each). Means were tested for significance using a two-tailed t-test. Asterisks denote significantly different means between mannitol (grey bars) and glucose (black bars) treatment (*P<0.05, **P<0.01, ***P<0.001).
