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. 2017 Dec 22;8:2620. doi: 10.3389/fmicb.2017.02620

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Copyright © 2017 Qin, Shang, Zhang, Li and Chai.

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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Principal component analysis of the relative abundance of OTUs. L-S60 Group represents seedlings treated by B. amyloliquefaciens L-S60; control group represents the seedlings without B. amyloliquefaciens L-S60 treatment. The PC1 represents the maximum variation factor and PC2 represents the second principal coordinate. First numbers “1–6” mean different time points for sample collection; “one” represents the day of sowing, “2–6” means day 5, 10, 15, 20 and 25 after sprout. Number “60” means the samples from L-S60 treatment group; “ck” represents the samples from uninoculation control group. Second number “1–3” means three replicates at different time points. For example, the sample “1-60-1” means the first sample collected on the day of sowing from L-S60 treatment group, “1-60-2” means the second sample collected on the day of sowing from L-S60 treatment group. Names of other samples follow the same manner.