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Fig. 4 | BMC Plant Biology

Fig. 4

From: The activation of iron deficiency responses of grapevine rootstocks is dependent to the availability of the nitrogen forms

Fig. 4

Root tip biochemistry results. (A) Ferric chelate reductase activity in root tips, (B) concentration of malic acid in root tips, (C) concentration of citric acid, and, (D) concentration of tartaric acid in the root tips of plants under all treatments (N1A0/+Fe; N1A0/-Fe; N1A1/+Fe; N1A1/-Fe). Results were obtained after 28 days of treatment application with both grapevine rootstocks. Values shown are means ± standard error and significant differences between treatments for each rootstock are indicated with different letters. (α < 0.05, Welch-ANOVA and Tukey or Games-Howell post hoc test, N = 3 per treatment and rootstock)

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