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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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Change in trichome density, branch number and ploidy level in response to salinity stress. (A) Distribution of leaf trichome in 7-days old wild-type, OE-1, sog1-6 and sog1-1mutant plants, either untreated or treated with 150 mM NaCl. (B) SEM and bright field micrographs of mature trichomes with three branches in wild-type, five branches in OE-1 and unbranched in sog1-6 and sog1-1mutant line plants following NaCl treatment. Scale bar: 100 μm (C) Determination of leaf trichome density and branch number in all the four genotypes. (D) Representative images of DAPI-stained nuclei of 7-days old untreated or NaCl-treated wild-type, OE-1, sog1-6 and sog1-1 mutant plants. Scale bar: 100 μm (E) Measurement of in-situ fluorescence in DAPI-stained trichome nuclei of wild-type, OE-1, sog1-6 and sog1-1 mutant seedlings. (F) Semi quantitative RT-PCR showing expression level of AtBLT gene in all genotypes in response to increasing NaCl concentrations. β-tubulin served as the internal control. Each column represents the mean value of three independent replicates. Images of full-length gels have been presented in Supplementary Fig. S12. Error bars indicate standard deviation. Asterisks indicate significant statistical differences (*p < 0.05, **p < 0.01) from control (without NaCl treatment) using one-way ANOVA factorial analysis.