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. 2016 Jun 23;198(10):987–993. doi: 10.1007/s00203-016-1260-2

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© The Author(s) 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 3 — Isolates were tested for indole acetic acid (IAA) production by bacteria immobilization on a nitrocellulose membrane followed by washing the membrane with Salkowski reagent. P. putida IAC-RBal4 was used as a positive control. A P. putida IAC-RBal4, B strain WH120T, C strain 5B5 and D strain WH15