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Relative expression of RiPTR2 (A) assessed by qRT-PCR in mycorrhizal roots exposed for 24 h to 10 mM Ala-Leu, 1 mM nitrate or no N. MtPT4 expression was used as marker of mycorrhization (B). Data for each condition are presented as mean ± standard deviation. Different letters indicate statistically significant difference (p < 0.05, ANOVA).
