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Reference Detail
| Reference | ||
|---|---|---|
| Author | Sun L.J., Zhang Q., Wu J.X., Zhang L.Q., Jiao X.W., Zhang S.W., Zhang Z.G., Sun D.Y., Lu T.G., Sun Y. | |
| Title | Two rice histidine phosphotransfer proteins, OsAHP1 and OsAHP2, mediate cytokinin signaling and stress responses in rice. | |
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Abstract: Cytokinin plays an important role in plant development and stress tolerance. Studies of Arabidopsis have demonstrated that cytokinin acts through a two-component system that includes a histidine kinase (HK), histidine phosphotransfer protein (HP), and a response regulator (RR). Phylogenetic analyses have revealed the conservation of HKs but lineage-specific expansion of HPs and RRs in rice. However, whether the functions of rice HPs have diverged remains unknown. In this study, two rice authentic HPs (OsAHP1 and OsAHP2) were knocked down simultaneously via RNA interference (RNAi), and the transgenic OsAHPs-RNAi plants exhibited phenotypes expected for a deficiency in cytokinin signaling, including dwarfism with reduced internode lengths, enhanced lateral root growth, early leaf senescence, and reduced tiller numbers and fertility under natural conditions. The OsAHPs-RNAi seedlings were also hyposensitive to exogenous cytokinin. Furthermore, OsAHPs-RNAi seedlings were hypersensitive to salt treatment but resistant to osmotic stress relative to wild-type plants. These results indicate that the HPs OsAHP1 and OsAHP2 not only function as positive regulators of the cytokinin signaling pathway, but also play distinct roles in stress responses in rice. |
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| Journal | Plant Physiol. | |
| Country | unknown | |
| Volume | 165(1) | |
| Pages | 335-45 | |
| Year | 2014 | |
| PubMed ID | 24578505 | |
| PubMed Central ID | - | |
| DOI | 10.1104/pp.113.232629 | |
| URL | - | |
| Relation | ||
| Gene | AHP1 AHP2 HKT1 NHX1 PHP1 PHP2 PHP3 SOS1 | |
| INSD | - | |
| Strain | Wild Core Collection | - |
| Induced Mutation Lines(NIG Collection) | - | |
| Sterile Seed Strain | - | |
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Lethal Embryo Mutantion Strain |
- | |
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Stages in Each Organ - Muant Lines (Gene) |
- | |
| Cultivated Varieties(NIG Collection) | - | |
| Stages in Each Organ | - | |
