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. 2017 Nov 13;7:15446. doi: 10.1038/s41598-017-15450-1

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© The Author(s) 2017

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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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Copper starvation response of rice cultivars. (a–b) Comparison of weight and length of N22 and PB1 seedlings under control and copper deficient condition. The error bars represent the standard error (n = 30). The asterisks indicate a significant difference between the indicated samples calculated by two tailed students t-test {P ≤ 0.05 (*), P ≤ 0.005 (**), P ≤ 0.001 (***)}. (c) Images of the seedlings grown under control and copper starvation conditions. (d) Relative expression profiling of DTA-miRNAs in rice seedlings under copper deficiency administered at seedling stage. 5 S was used to normalize the miRNA transcript level. Five biological replicates were analyzed with three technical repeats. Error bars represent the standard error. The expression of miR2878-5p was not detected in the PB1 seedlings. (e) Effect of copper starvation on the accumulation of ROS species (superoxide radical with NBT stain and hydrogen peroxide with DAB stain) in the leaves of N22 and PB1 seedlings.