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Plant Cell, Tissue and Organ Culture (PCTOC)

, Volume 136, Issue 1, pp 75–84 | Cite as

Methyl jasmonate enhances apple’ cold tolerance through the JAZ–MYC2 pathway

  • Yicheng Wang
  • Haifeng Xu
  • Wenjun Liu
  • Nan Wang
  • Changzhi Qu
  • Shenghui Jiang
  • Hongcheng Fang
  • Zongying Zhang
  • Xuesen Chen
Original Article
  • 129 Downloads

Abstract

Improving the cold resistance of plants is important, because their growth and development are negatively affected by cold stress. In this study, exogenous applications of methyl jasmonate could enhance the cold resistance of ‘Orin’ apple (Malus × domestica) calli by increasing the expression levels of the cold-signal response genes MdCIbHLH1, MdCBF1, MdCBF2 and MdCBF3. In addition, yeast two-hybrid and pull-down assays demonstrated that MdCIbHLH1 interacts with MdJAZ1/4 and MdMYC2 in vitro and in vivo. Protein degradation experiments demonstrated that the stability of the MdJAZ1/4 proteins were affected by the application of exogenous methyl jasmonate, which was followed by their degradation by the 26S proteasome. MdJAZ1/4 act as repressors, binding MdMYC2 in the jasmonate-signaling pathway. The overexpression of MdMYC2 in ‘Orin’ calli increased the expression levels of MdCIbHLH1, MdCBF1, MdCBF2 and MdCBF3, resulting in an increased freeze tolerance. Furthermore, the overexpression of MdJAZ1 or MdJAZ4 in transgenic red-fleshed apple calli weakened the promotive effect of MdMYC2 on cold tolerance. Yeast one-hybrid and chromatin immunoprecipitation-PCR analyses showed that MdMYC2 could bind the G-box element found in the MdCBF1 promoter. Thus, jasmonate may function as a critical upstream signal in the ICE–CBF/DREB1 pathway to positively regulate apple freeze tolerance.

Keywords

Cold stress Methyl jasmonate MdMYC2 MdCBF1 Apple 

Notes

Acknowledgements

This work was supported by the National Natural Science Foundation of China (31572091) and the National Key Research and Development Project of China (2016YFC0501505).

Author contributions

Conceived and designed the experiments: YW, WL, NW and XC. Conducted the experiments: YW. Analyzed the data: YW and XC. Wrote the manuscript: YW, WL, NW and XC.

Compliance with ethical standards

Conflict of interest

The authors declare no conflict of interest.

Supplementary material

11240_2018_1493_MOESM1_ESM.docx (20 kb)
Supplementary Table S1—Details regarding the primers used in this study (DOCX 20 KB)
11240_2018_1493_MOESM2_ESM.docx (16 kb)
Supplementary Table S2—The NCBI accession numbers of transcription factors used in this study (DOCX 15 KB)

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Copyright information

© Springer Nature B.V. 2018

Authors and Affiliations

  • Yicheng Wang
    • 1
    • 2
  • Haifeng Xu
    • 1
    • 2
  • Wenjun Liu
    • 1
    • 2
  • Nan Wang
    • 1
    • 2
  • Changzhi Qu
    • 1
    • 2
  • Shenghui Jiang
    • 1
    • 2
  • Hongcheng Fang
    • 1
    • 2
  • Zongying Zhang
    • 1
    • 2
  • Xuesen Chen
    • 1
    • 2
  1. 1.State Key Laboratory of Crop Biology, College of Horticulture Science and EngineeringShandong Agricultural UniversityTai’anChina
  2. 2.Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production in ShandongTai’anChina

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