Abstract
Key message
SlMYB75 increased the accumulation of JA and improved the scavenging of excess H 2 O 2 to resist B. cinerea. Overexpression of SlMYB75 greatly prolongs tomato fruit storage life.
Abstract
Botrytis cinerea (B. cinerea) is a major threat to the production and storage life of tomato (Solanum lycopersicum) fruit around the world. SlMYB75 is an R2R3MYB transcription factor associated with the biosynthesis of anthocyanidin, but little is known about its function in the resistance of tomato to B. cinerea. In this study, we found that the overexpression of SlMYB75 regulated the accumulation of jasmonic acid (JA) and promoted the JA-mediated signaling pathway to resist B. cinerea infection. Moreover, the activities of peroxidase and superoxide dismutase, which were activated to scavenge hydrogen peroxide produced as a result of the B. cinerea infection, were enhanced in the transgenic tomato plants. Scanning electron microscopy images showed that the wax on the fruit skin surface was significantly decreased in the transgenic tomatoes compared with the wild type. However, SlMYB75 prolonged fruit storage life by both enhancing resistance to B. cinerea and directly downregulating the fruit shelf life-related gene SlFSR. Collectively, this study provides a good candidate gene for breeding high-quality tomatoes with a long storage life and high disease resistance.
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Acknowledgements
This work was supported by fundings from the National Natural Science Foundation of China (31872950 and 31672170), the Shandong “Double Tops” Program (SYL2017YSTD06) and the ‘Taishan Scholar’ Foundation of the People’s Government of Shandong Province (ts20130932).
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Z.R. and M.L. designed the experiments. M.L. and Z.Z. performed most of the experiments and analyzed the data. Z.X., C.C., and L.W. assisted in experiments and discussed the results. Z.R. and M.L. wrote the manuscript.
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The authors declare competing financial interests: the authors (Zhonghai Ren and Mengyu Liu on behalf of Shandong Agricultural University) have filed a gene patent application based in part on this work with the China State Intellectual Property Office.
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Liu, M., Zhang, Z., Xu, Z. et al. Overexpression of SlMYB75 enhances resistance to Botrytis cinerea and prolongs fruit storage life in tomato. Plant Cell Rep 40, 43–58 (2021). https://doi.org/10.1007/s00299-020-02609-w
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DOI: https://doi.org/10.1007/s00299-020-02609-w