Abstract
Mitogen-activated protein kinase (MAPK) cascades are conserved signal-transducing modules that have important functions in plant growth and development as well as in diverse biotic and abiotic stress responses. In this study, six MAP kinase kinase kinase genes, two MAP kinase kinase genes, and 11 MAP kinase genes in wheat were characterized. The MAPK cascade members of wheat were named based on their homologs in Brachypodium distachyon and Arabidopsis. The polypeptides translated from these MAPK cascade genes share conserved domains similar to those reported in B. distachyon and Arabidopsis, and such domains are involved in protein interaction and phosphorylation. Expression analysis results of the MAPK cascade members revealed that some of the selected genes were involved in responses to phosphorus (P; ten genes) and nitrogen (N; five genes) deprivation, salinity (five genes), and drought (three genes). Such genes were either upregulated or downregulated. Temporal expression profile analysis of the stress-responsive MAPK members indicated that all of these genes were progressively regulated by stress and exhibited typical recovery responses when these genes were exposed again to normal growth conditions. Two MAPK members, TaMPK6 and TaMPK16, responded to four stress factors, including deprivations of P and N as well as salt and drought stress. TaMPK4, TaMPK12;1, TaMPK14, and TaMPK17 were responsive to two stress factors. These results suggested that various MAPK cascade members in wheat are involved in mediating signal transductions by transcriptionally regulating P and N deprivations, high salinity, and drought. TaMPK6 and TaMPK16, together with TaMPK4, TaMPK12;1, TaMPK14, and TaMPK17 have potential functions in mediating plant responses and tolerance to two or more stress factors by distinct MAPK cascade modules. Our data have provided information about MAPK modules and put further insight into their biological functions in abiotic stress response of wheat.







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Discover the latest articles and news from researchers in related subjects, suggested using machine learning.Abbreviations
- MAPK:
-
Mitogen-activated protein kinase
- MAPKK:
-
Mitogen-activated protein kinase kinase
- MAPKKK:
-
Mitogen-activated protein kinase kinase kinase
- PEG:
-
polyethylene glycol
- CK:
-
Control group
- Pi:
-
Inorganic phosphate
- RT-PCR:
-
Reverse transcriptase-polymerase chain reactions
- pI:
-
Isoelectric points
- ER:
-
Endoplasmic reticulum
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Acknowledgments
This work was financially supported by the National Science Foundation of China (grant nos. 31201674 and 31371618), the National Transgenic Major Program (grant no. 2011ZX08008), and Key Laboratory of Crop Growth Regulation of Hebei Province. The authors thank two anonymous reviewers and the editor whose detailed comments and careful work helped to improve the manuscript.
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Yanli Wen and Xiaojuan Li contributed equally to this work.
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Wen, Y., Li, X., Guo, C. et al. Characterization and expression analysis of mitogen-activated protein kinase cascade genes in wheat subjected to phosphorus and nitrogen deprivation, high salinity, and drought. J. Plant Biochem. Biotechnol. 24, 184–196 (2015). https://doi.org/10.1007/s13562-014-0256-8
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DOI: https://doi.org/10.1007/s13562-014-0256-8


