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. 2021 Dec 9;21:583. doi: 10.1186/s12870-021-03356-0

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© The Author(s) 2021

Open AccessThis 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/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 6 — Analysis of drought tolerance in the PbrbZIP51-silenced Pyrus betulaefolia plants. Phenotype of 1-month-old PbrbZIP51-silenced plants before and after drought treatment for 15 days (a). Electrolyte leakage (EL) (b). Malondialdehyde (MDA) concentrations after drought treatment (c). Chlorophyll fluorescence imaging of silenced plants and control plants (d). The expression of PbrbZIP51 was detected by RT-PCR (e) and qRT-PCR (f) at 3 days after the injection. Chl content of control and pTRV-PbrbZIP51 silencing plants (pTRV-1, pTRV-2) at the end of the drought stress (g), and the phenotype (h) of control and pTRV-PbrbZIP51 silencing plants after drought treatment, and the Fv/Fm ratios (i). Quantitative measurement of H₂O₂ levels after drought treatment (j)