Abstract
Seagrass meadows are among the four most productive marine natural ecosystems in the world. Zostera japonica (Z. japonica) is the most widely distributed species of seagrass in China. Nucleotide exchange factors (NEFs) promote the release of ADP during heat stress, accelerating the rate-limiting step of Heat shock protein 70 (Hsp70). Although NEFs play an important role in abiotic stress tolerance of plants, NEFs in seagrass have not been studied. In this study, we cloned Fes1 from Z. japonica (ZjFes1) by rapid amplification of the cDNA ends using RACE, and full length ZjFes1 was 1171 bp. It contained an 81 bp 5′-terminal untranslated region (UTR), 109 bp 3′-UTR and 981 bp open reading frame (ORF). The ORF (ZjFes1) was predicted to encode a polypeptide of 326 amino acids with theoretical molecular weight (MW) of 36.10 kDa and pI of 5.22. ZjFes1 shared 89% amino acid identity with Fes1 from Zostera marina (Z. marina). The transcriptional levels of ZjFes1 increased significantly 1 h after heat treatment. ZjFes1 was localized to the cytoplasm. Taken together, we found that ZjFes1 was a stress-inducible gene that may be involved in heat stress response. This study lays the foundation for further studies on the role of ZjFes1 in heat resistance.
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Data availability
All data generated or analyzed during this study are included in this published article. The nucleotide and deduced amino acid sequence of ZjFes1 was registered in the GenBank (No. MK124711).
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Acknowledgements
This study was supported by the Guangxi Key Laboratory of Mangrove Conservation and Utilization funds (GKLMC-16A01), the Basic Scientific Foundation of Guangxi Institite of Public Welfare Scientific Research (2018GMRC02), the Natural Science Foundation of Guangxi Province (2018GXNSFBA281062), the Distinguished Employment Offered Unit of Guangxi for Conservation and Ecological Monitoring of Mangroves and Seagrasses, the National Science & Technology Basic Work Program (2015FY110600) and the National Key Research and Development Program of China (2017YFC0506100). These funding bodies had no role in experimental design, collection, analysis, and interpretation of data, or in writing the paper.
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SC designed the study and performed the laboratory experiments. GQ designed the fieldwork. SC wrote most of the paper. All authors reviewed and edited the paper.
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Chen, S., Qiu, G. Heat-stress induced expression of stress-inducible nucleotide exchange factor Fes1 in seagrass Zostera japonica. Ecotoxicology 29, 932–940 (2020). https://doi.org/10.1007/s10646-020-02185-5
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DOI: https://doi.org/10.1007/s10646-020-02185-5