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. 2015 Dec 22;6:1466. doi: 10.3389/fmicb.2015.01466

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Copyright © 2015 Wu, Ding, Zhang, Liu and Yang.

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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Induction of T3SS by OA accelerates disease progress on tobacco. 6-week-old tobacco plants were inoculated with R. solanacearum treated with DMSO or 100 μM of OA by pouring a bacterial suspension onto a pot containing an unwounded plant. Symptoms were rated daily using a disease index scale of 0–4 (0, no symptoms appeared; 1, 1–25% of leaves wilted; 2, 26–50% of leaves wilted; 3, 51–75% of leaves wilted; 4, 76–100% of leaves wilted). Each point represents the average disease index of 16 plants. The OA treatment was significantly different from the DMSO treatment (P < 0.05; repeated-measures ANOVA). Similar results were observed in other two independent experiments.