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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 on A. thaliana root hair development. (A) Representative images of A. thaliana root tip showing root hair formation after 7 days of growth on control or with Cra20 plates. The scale bars represent 200 μm. (B) Time course of root hair length in response to Cra20 (20 root hairs per plant, 8 plants from three different plates) and (C) Time course of root hair density in response to Cra20 in the root segment located 2 mm above the root tip (eight plants from three different plates) of Arabidopsis seedlings growth on control or with Cra20 plates. Asterisk indicate statistically significant differences compared with control treated roots (Student’s t-test; P < 0.001). The experiment was repeated three times with similar results.