Abstract
Key message
ZmDi19-1 can be induced by various abiotic stresses and enhance the salt tolerance of transgenic Arabidopsis thaliana.
Abstract
Drought-induced protein 19 (Di19) is an essential zinc finger family member that plays vital roles in regulating multiple stress responses. Here, the Di19 family gene in maize (Zea mays) ZmDi19-1 was characterized. We determined that ZmDi19-1 is constitutively expressed in root, stem, leaf and other maize tissues under normal conditions. In addition, ZmDi19-1 expression was induced by PEG and NaCl stresses. The subcellular localization revealed that ZmDi19-1 is a nuclear membrane protein. In yeast cells, ZmDi19-1 displayed transcriptional activity and could bind to the TACA(A/G)T sequence, which was corroborated using the dual luciferase reporter assay system. The overexpression of ZmDi19-1 in Arabidopsis thaliana enhanced the plants’ tolerance to salt stress. Compared with wild-type, the Arabidopsis ZmDi19-1-overexpressing lines had higher relative water and proline contents, and lower malondialdehyde contents, in leaves under salt-stress conditions. The transcriptome analysis revealed 1414 upregulated and 776 downregulated genes, and an RNA-seq analysis identified some differentially expressed genes, which may be downstream of ZmDi19-1, involved in salt-stress responses. The data demonstrated that ZmDi19-1 responds to salt stress and may impact the expression of stress-related genes in Arabidopsis.
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Abbreviations
- ABA:
-
Abscisic acid
- GFP:
-
Green fluorescent protein
- MDA:
-
Malondialdehyde
- REL:
-
Relative electrical leakage
- ORF:
-
Open reading frame
- qRT-PCR:
-
Quantitative real-time polymerase chain reaction
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (31871627, 31701436) and the Science and Technology Major Project of Anhui Province (18030701180).
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299_2019_2467_MOESM1_ESM.tif
Fig S1 Validation of transgenic Arabidopsis overexpressing ZmDi19-1. a PCR analysis of transgenic Arabidopsis thaliana using ZmDi19-1 gene primers. b GUS staining of ZmDi19-1 transgenic Arabidopsis thaliana (TIFF 7511 kb)
299_2019_2467_MOESM3_ESM.tif
Fig S3 Expression levels of ABA-related genes in ZmDi19-1 transgenic Arabidopsis and WT after salt-stress treatments (TIFF 15050 kb)
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Zhang, X., Cai, H., Lu, M. et al. A maize stress-responsive Di19 transcription factor, ZmDi19-1, confers enhanced tolerance to salt in transgenic Arabidopsis. Plant Cell Rep 38, 1563–1578 (2019). https://doi.org/10.1007/s00299-019-02467-1
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DOI: https://doi.org/10.1007/s00299-019-02467-1