Abstract
Plant 14–3-3 proteins play key roles in regulating growth, development, and stress responses. However, little is known about this gene family in papaya (Carica papaya L.). We characterized eight 14–3-3 genes from the papaya genome and designed them as CpGRF1–8. Based on phylogenetic, conserved motif, and gene structure analyses, papaya CpGRFs were divided into ε and non-ε groups. Expression analysis showed differential and class-specific transcription patterns in different organs. Quantitative real-time polymerase chain reaction analysis showed that most CpGRFs had large changes in expression during fruit development and ripening. This indicated that the CpGRFs were involved in regulating fruit development and ripening. Significant expression changes occurred after cold, salt, and drought treatments in papaya seedlings, indicating that CpGRFs were also involved in signaling responses to abiotic stress. These results provide a transcription profile of 14–3-3 genes in organs, during fruit development and ripening and in response to stress. Some highly expressed, fruit-specific, and stress-responsive candidate CpGRFs will be identified for further genetic improvement of papayas.
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Data Availability
The identified 14–3-3 gene sequences can be obtained from the Carica papaya ASGPBv0.4 genome database (https://phytozome.jgi.doe.gov/pz/portal.html/) (accession numbers are listed in Table S1).
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Acknowledgements
This work was supported by the Key Research and Development Project of Hainan Province (ZDYF2017017), Central Public-interest Scientific Institution Basal Research Fund for Chinese Academy of Tropical Agricultural Sciences (No. 1630052017015), and the National Natural Science Foundation of China (31201663). None of these organizations influenced the study design, the data analysis, and the decision to submit manuscript for publication. We thank LetPub (www.letpub.com) for its linguistic assistance during the preparation of this manuscript.
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The study was designed by APG, MYL, and LCR. ZZ, WH, SSX, XLY, ZHD, YY, WWT, and JHY conducted the experiments and analyzed the data. MYL and APG wrote the manuscript. The final manuscript was read and approved by all authors.
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Li, M., Ren, L., Zou, Z. et al. Identification and Expression Analyses of the Special 14–3-3 Gene Family in Papaya and its Involvement in Fruit Development, Ripening, and Abiotic Stress Responses. Biochem Genet 59, 1599–1616 (2021). https://doi.org/10.1007/s10528-021-10077-4
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DOI: https://doi.org/10.1007/s10528-021-10077-4