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. 2017 Sep 22;8:1597. doi: 10.3389/fpls.2017.01597

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Copyright © 2017 Tan, Chen, Benelli, Desneux, Yang, Liu and Ge.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Aphid pre-infestation duration effects on related defense genes in the SA- (A) and JA- (B) signaling pathways in tomato plants. The relative mRNA expression was calculated according to the 2^-ΔΔC_T method, and the y axis represents the level of change. The expression level of each target gene was first normalized to the quantity of SlActin and SlTub. The error bar represents the standard deviation calculated from three replicates. Letters indicate significant differences in relative expression among different aphid pre-infestation durations, and ‘^∗’ indicates significant differences in the same aphid pre-infestation duration according to Duncan’s test at P = 0.05.