- Information
- Symbol: OsHBP1b,OsTGA5
- MSU: LOC_Os01g17260
- RAPdb: Os01g0279900
- Publication
- A nuclear-localized histone-gene binding protein from rice OsHBP1b functions in salinity and drought stress tolerance by maintaining chlorophyll content and improving the antioxidant machinery., 2014, J Plant Physiol.
- A unique bZIP transcription factor imparting multiple stress tolerance in Rice., 2019, Rice (N Y).
- Phosphorylation of OsTGA5 by casein kinase II compromises its suppression of defense-related gene transcription in rice., 2022, Plant Cell.
- Genbank accession number
- Key message
- As compared to the WT tobacco plants, the transgenic plants ectopically expressing OsHBP1b showed better survival and favourable osmotic parameters (such as germination and survival rate, membrane stability, K(+)/Na(+) ratio, lipid peroxidation, electrolyte leakage and proline contents) under salinity and drought stress
- qRT-PCR based expression studies for OsHBP1b in seedlings of contrasting genotypes of rice showed its differential regulation in response to salinity stress
- Taken together, our findings suggest that OsHBP1b contributes to abiotic stress tolerance through multiple physiological pathways and thus, may serve as a useful ‘candidate gene’ for improving multiple stress tolerance in crop plants
- In the present study, we over-express the full-length gene encoding OsHBP1b in the homologous system (rice) to assess its contribution towards multiple stress tolerance and grain yield
- Recently, we have reported the characterization of OsHBP1b in relation to salinity and drought tolerance in a model system tobacco
- We provide evidence to show that transgenic rice plants over-expressing OsHBP1b exhibit better survival and favourable osmotic parameters under salinity stress than the wild type counterparts
- Phosphorylation of OsTGA5 by casein kinase II compromises its suppression of defense-related gene transcription in rice.
- Importantly, we showed that the nucleus-localized casein kinase II (CK2) complex interacts with and phosphorylates OsTGA5 on Ser-32, which reduces the affinity of OsTGA5 for the JIOsPR10 promoter, thereby alleviating the repression of JIOsPR10 transcription and increasing rice resistance
- In this study, we characterized the role of OsTGA5 as a negative regulator of rice resistance against blast fungus by transcriptionally repressing the expression of various defense-related genes
- Moreover, OsTGA5 repressed PTI responses and the accumulation of endogenous salicylic acid
- Furthermore, the in vivo phosphorylation of OsTGA5 Ser-32 was enhanced by blast fungus infection
- Taken together, our results provide a mechanism for the role of OsTGA5 in negatively regulating the transcription of defense-related genes in rice and the repressive switch imposed by nuclear CK2-mediated phosphorylation during blast fungus invasion
- Connection
- Hd6~CK2, OsHBP1b~OsTGA5, Phosphorylation of OsTGA5 by casein kinase II compromises its suppression of defense-related gene transcription in rice., Importantly, we showed that the nucleus-localized casein kinase II (CK2) complex interacts with and phosphorylates OsTGA5 on Ser-32, which reduces the affinity of OsTGA5 for the JIOsPR10 promoter, thereby alleviating the repression of JIOsPR10 transcription and increasing rice resistance
- JIOsPR10~OsPR10, OsHBP1b~OsTGA5, Phosphorylation of OsTGA5 by casein kinase II compromises its suppression of defense-related gene transcription in rice., Importantly, we showed that the nucleus-localized casein kinase II (CK2) complex interacts with and phosphorylates OsTGA5 on Ser-32, which reduces the affinity of OsTGA5 for the JIOsPR10 promoter, thereby alleviating the repression of JIOsPR10 transcription and increasing rice resistance
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