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Rice CaM-binding transcription factor (OsCBT) mediates defense signaling via transcriptional reprogramming.
- Source :
- Plant Biotechnology Reports; Jun2020, Vol. 14 Issue 3, p309-321, 13p
- Publication Year :
- 2020
-
Abstract
- The mutant allele of rice calmodulin-binding transcription activator OsCBT, oscbt-1, exhibits broad-spectrum resistance against rice pathogens. Previously, we reported that the strong resistance of the oscbt-1 mutant to pathogens was conferred by a constitutive upregulation of defense-related genes even under pathogen-free conditions. We also found strong induction of the hypersensitive response as a reaction to pathogen invasion. The results suggest that OsCBT acts as a negative regulator of basal resistance to pathogen attack. To identify the transcriptional network regulated by OsCBT, we compared global gene expression profiles between wild-type (WT) and oscbt-1 rice plants grown under pathogen-free conditions. The results of a 3′ tiling microarray revealed that in oscbt-1 plants, 81 genes are upregulated and 200 genes are downregulated when compared with the WT. A gene ontology analysis showed that differentially regulated genes in oscbt-1 were very closely associated with "death" GO term in a biological process category, and "catalytic activity" and "binding" GO terms in a molecular function category. A MapMan analysis indicated that the functions of these genes were associated with plant responses to biotic stress. Moreover, the results from quantitative real-time PCR in the oscbt-1 mutant showed a significant effect on the gene expression patterns of the fungal pathogen response. Our results suggested that the OsCBT regulates a rice defense response by modulating the expressions of various defense-related genes. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 18635466
- Volume :
- 14
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Plant Biotechnology Reports
- Publication Type :
- Academic Journal
- Accession number :
- 143136247
- Full Text :
- https://doi.org/10.1007/s11816-020-00603-y