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Marker genes for sugar signaling in frostbite1 (fro1) or wild-type (WT) Arabidopsis ecotype C24 plants cultured on NH4+ and NO3− as the only nitrogen source. (A) Transcript levels for hexokinase 1 (HXK1) and (B) sucrose non-fermenting 1–related kinase 1 (SnRK1.1). Values are the mean ± standard deviation (SD) of three biological and two technical replicates. Means with different letters are significantly different (p < 0.05) by ANOVA followed by Tukey’s test.
