Abstract
Key message
The molybdenum cofactor sulfurase gene ( AnMCSU ) was cloned from xerophytic desert plant Ammopiptanthus nanus and validated for its function of tolerance toward abiotic stresses by heterologous expression in Arabidopsis thaliana.
Abstract
Molybdenum cofactor sulfurase participates in catalyzing biosynthesis of abscisic acid, which plays a crucial role in the response of plants to abiotic stresses. In this study, we cloned molybdenum cofactor sulfurase gene (AnMCSU) from a super-xerophytic desert plant, Ammopiptanthus nanus, by using rapid amplification of cDNA ends method. This gene has a total length of 2544 bp, with a 5′- and a 3′-untranslated region of 167 and 88 bp, and an open reading frame of 2289 bp, which encodes an 84.85 kDa protein of 762 amino acids. The putative amino acid sequence shares high homology and conserved amino acid residues crucial for the function of molybdenum cofactor sulfurases with other leguminous species. The encoded protein of the AnMCSU gene was located in the cytoplasm by transient expression in Nicotiana benthamiana. The result of real-time quantitative PCR showed that the expression of the AnMCSU gene was induced by heat, dehydration, high salt stresses, and ABA induction, and inhibited by cold stress. The heterologous expression of the AnMCSU gene significantly enhanced the tolerance of Arabidopsis thaliana to high salt, cold, osmotic stresses, and abscisic acid induction. All these results suggest that the AnMCSU gene might play a crucial role in the adaptation of A. nanus to abiotic stress and has potential to be applied to transgenic improvement of commercial crops.
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Abbreviations
- ABA:
-
Abscisic acid
- MoCo:
-
Molybdenum cofactor
- MCSU:
-
Molybdenum cofactor sulfurase
- cDNA:
-
Complementary DNA
- RACE:
-
Rapid amplification of cDNA ends
- qRT-PCR:
-
Quantitative real-time PCR
- ORF:
-
Open reading frame
- UTR:
-
Untranslated region
- eGFP:
-
Enhanced green fluorescent protein
- CaMV:
-
Cauliflower mosaic virus
- OCS:
-
Octopine synthetase
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Acknowledgments
This work was supported by the National Key Science and Technology Special Project (2014ZX08003-004) and the National Natural Science Foundation of China (31071433). The authors thank the technical support from the Key Laboratory of Biology and Genetic Improvement of Maize in Southwest Region and the anonymous reviewers for their critical reading and modification suggestions.
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The authors declare that they have no conflict of interest.
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Communicated by Q. Zhao.
H. Q. Yu and Y. Y. Zhang contributed equally to this work.
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Yu, H.Q., Zhang, Y.Y., Yong, T.M. et al. Cloning and functional validation of molybdenum cofactor sulfurase gene from Ammopiptanthus nanus . Plant Cell Rep 34, 1165–1176 (2015). https://doi.org/10.1007/s00299-015-1775-z
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DOI: https://doi.org/10.1007/s00299-015-1775-z