Abstract
The differences in gene expression between two rice genotypes—the ultraviolet-B (UV-B)-resistant cultivar Lemont and the UV-B-sensitive cultivar Dular—in response to irradiation with UV-B were studied. Suppression subtractive hybridization and real-time quantitative reverse transcriptase polymerase chain reaction were used in the analysis. The results showed that enhanced UV-B radiation could induce differential expression of the genes related to defense response. The expression of genes encoding HECT domain-containing protein, thylakoid-bound ascorbate peroxidase, receptor-like protein kinase, Rad6 (ubiquitin carrier protein), phenylalanine ammonia-lyase, 4-coumarate: CoA ligase and chalcone synthase was up-regulated to different extents in the two rice cultivars: The cultivar Lemont exhibited a higher increase in the gene expression compared with the cultivar Dular. A large difference was found in the expression pattern of the universal stress protein (USP): showing down-regulation in Dular but up-regulation in Lemont. Hence exposure to UV-B radiation has a significant effect on gene expression in rice. In response to UV exposure, a molecular response is initially induced in different UV-B-resistant rice cultivars. This response may activate secondary metabolic pathways, in turn increase the synthesis of UV-protective substances (flavonoids) to prevent UV-B damage and induce the transcription of the relevant mRNAs for repairing the damaged DNA.
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Abbreviations
- SSH:
-
Suppression subtractive hybridization
- qRT-PCR:
-
Real-time quantitative reverse transcriptase polymerase chain reaction
- UV-B:
-
Ultraviolet-B
- PAL:
-
Phenylalanine ammonia-lyase
- PKD:
-
Protein kinase domain containing protein
- HECT:
-
HECT domain containing protein
- USP:
-
Universal stress protein
- tAPX:
-
Thylakoid-bound ascorbate peroxidase
- 4CL:
-
4-Coumarate: CoA ligase
- CHS:
-
Chalcone synthase
- RLK:
-
Receptor-like protein kinase
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Acknowledgments
The project was financially supported by National Natural Science Foundation of China (No.30571103, 30971737) and National Research Foundation for the Doctoral Program of Higher Education of China (No.20050389004).
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Fang, CX., Wu, XC., Zhang, HL. et al. UV-induced differential gene expression in rice cultivars analyzed by SSH. Plant Growth Regul 59, 245–253 (2009). https://doi.org/10.1007/s10725-009-9411-y
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DOI: https://doi.org/10.1007/s10725-009-9411-y