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. 2021 Jun 2;11:11659. doi: 10.1038/s41598-021-91293-1

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Salinity mediated induction of oxidative stress. (A–C, left panels) Qualitative analysis of H₂O₂ accumulation levels in the roots of 7-days old wild-type, OE-1, sog1-6and sog1-1 mutant lines in the absence and presence of 50 and 150 mM NaCl, respectively. (A–C, right panels) Localization of superoxide radicals by ROS imaging using CM-H₂DCFDA in root tips of all the genotypes in absence and presence of NaCl. Dark regions and green patches indicated by the arrow heads showing H₂O₂ accumulation and ROS generation, respectively. Representative images from at least three independent experiments with similar results are shown. (D,E) Quantitative estimation of H₂O₂ content and total ROS in the roots of 7-days old wild-type, OE-1, sog1-6 and sog1-1 mutant line seedlings, either untreated or treated with increasing concentrations of NaCl. Quantitative data has been represented as the mean value of three independent biological replicates. Error bars represent standard deviation. Asterisks represent statistically significant differences (*p < 0.05, **p < 0.01) relative to controls.