Abstract
Key message
MeJA supplementation enhanced the chilling tolerance and gene expression of PpMsrA1. PpMYB105 protein positively regulated the PpMsrA1 promoter. PpMYB105 mediated the MeJA-boosted chilling tolerance by regulating PpMsrA1.
Abstract
Cold storage can maintain the quality of postharvest fruit. However, peaches easily suffer from chilling injury (CI) during cold storage, leading to economic loss. Results showed that methyl jasmonate (MeJA) supplementation reduced the CI severity, and enhanced the gene expression of methionine sulfoxide reductase A1 (PpMsrA1). It was found that MeJA application elevated the MsrA activity and methionine (Met) content, and reduced the methionine-S-sulfoxide (Met-S-SO) content and reactive oxygen species (ROS) production afterwards. Moreover, PpMYB105 could activate the transcription of PpMsrA1 by binding to the MYB binding element in its promoter. The gene expression of PpMYB105 was up-regulated by MeJA application. Overexpression of PpMYB105 in tomatoes enhanced the chilling tolerance and gene expression of SlMsrA1. Virus-induced gene silencing of PpMYB105 in peaches resulted in the increase in CI severity and the decrease in gene expression of PpMsrA1. Thus, PpMYB105 was involved in the MeJA-boosted chilling tolerance by regulating PpMsrA1.
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This project was supported by the National Natural Science Foundation of China (32202131).
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CJ: conceptualization, formal analysis, investigation, methodology, data curation, writing, supervision, project administration, and funding acquisition. YW: methodology. JD: data curation.
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Communicated by Prakash P. Kumar.
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Jiao, C., Wei, Y. & Dong, J. PpMYB105 inhibits chilling injury by regulating PpMsrA1 in peach fruit. Plant Cell Rep 42, 1557–1569 (2023). https://doi.org/10.1007/s00299-023-03047-0
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DOI: https://doi.org/10.1007/s00299-023-03047-0