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. 2019 Jun 5;10:1221. doi: 10.3389/fmicb.2019.01221

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Copyright © 2019 Luo, Wang, Huang, Zhou, Gao, Yan, Sheng and An.

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) and the copyright owner(s) 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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Effects of Sphingomonas sp. Cra20 inoculation on the growth of A. thaliana Col-0 seedlings. (a) Representative images of seedlings growing on control plates and plates containing Cra20. (b) Shoot biomass production measured after 7 days of co-culture with Cra20. (c) Lateral root number per seedling measured after 7 days of co-culture with or without Cra20. (d) Time course of lateral root number in response to Cra20. (e) Time course of lateral root density in response to Cra20. Data represent mean fresh weights ± SD of twelve groups of seedlings each consisting of two excised shoots. Lateral root number ± SD of at least 20 seedlings from three different plates. Asterisks indicate statistically significant difference compared with Control-treated roots (Student’s t-test; P < 0.001). The experiment was repeated three times with similar results.