Abstract
Key message
Our findings indicated that the SlERF.J2-IAA23 module integrates hormonal signals to regulate hypocotyl elongation and plant height in tomato.
Abstract
Light and phytohormones can synergistically regulate photomorphogenesis-related hypocotyl elongation and plant height in tomato. AP2/ERF family genes have been extensively demonstrated to play a role in light signaling and various hormones. In this study, we identified a novel AP2/ERF family gene in tomato, SlERF.J2. Overexpression of SlERF.J2 inhibits hypocotyl elongation and plant height. However, the plant height in the slerf.j2ko knockout mutant was not significantly changed compared with the WT. we found that hypocotyl cell elongation and plant height were regulated by a network involving light, auxin and gibberellin signaling, which is mediated by regulatory relationship between SlERF.J2 and IAA23. SlERF.J2 protein could bind to IAA23 promoter and inhibit its expression. In addition, light–dark alternation can activate the transcription of SlERF.J2 and promote the function of SlERF.J2 in photomorphogenesis. Our findings indicated that the SlERF.J2-IAA23 module integrates hormonal signals to regulate hypocotyl elongation and plant height in tomato.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (31872121), and the Natural Science Foundation of Chongqing of China (csts2019jcyj-msxmX0094), and the Innovation project of people returned from studying abroad of Chongqing (cx2019158).
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ZH and QX designed and managed the research work and improved the manuscript. YC, HY designed the experiments and analyzed the data. YC, BT, FL, GC performed the experiments. YC wrote the manuscript.
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Chen, Y., Yang, H., Tang, B. et al. The AP2/ERF transcription factor SlERF.J2 functions in hypocotyl elongation and plant height in tomato. Plant Cell Rep 42, 371–383 (2023). https://doi.org/10.1007/s00299-022-02963-x
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DOI: https://doi.org/10.1007/s00299-022-02963-x