Os02g0640500
The rice Os02g0640500 was reported as OsSIT1 in 2014 [1] by researchers from China.
Contents
Annotated Information
Gene Symbol
Figure 2. Real-time PCR analysis of the SIT1, SIT2, and SIT3 mRNA levels in the RNAi seedlings.[1].
- Os02g0640500 <=> SIT1,OsSIT1
Function
- The rice (Oryza sativa) Salt Intolerance 1 (SIT1), a lectin receptor-like kinase expressed mainly in root epidermal cells, mediates salt sensitivity.
- NaCl rapidly activates SIT1, and in the presence of salt, as SIT1 kinase activity increased, plant survival decreased.
- Rice MPK3 and MPK6 function as the downstream effectors of SIT1.
- SIT1 phosphorylates MPK3 and 6, and their activation by salt requires SIT1. SIT1 mediates ethylene production and salt-induced ethylene signaling. SIT1 promotes accumulation of reactive oxygen species (ROS), leading to growth inhibition and plant death under salt stress, which occurred in an MPK3/6- and ethylene signaling-dependent manner in Arabidopsis thaliana.
- SIT1 and SIT2 each contribute to salt sensitivity and that their functions are not overlapping.
Expression
- SIT1 and SIT2 RNA expression was analyzed by quantitative RT-PCR in various tissues; the highest level of SIT1 and a relatively high level of SIT2 were detected in roots. SIT1 and SIT2 transcripts were mainly concentrated in the maturation zone, the region that produces lateral roots and root hairs.
- In RNAi plants, the transcript level of SIT1 was reduced more dramatically than that of SIT2. These results suggest that SIT1 is a major contributor to root function and is responsible for the RNAi phenotype.
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Labs working on this gene
- Hebei Key Laboratory of Molecular and Cellular Biology, Hebei 050024, P.R. China
- Laboratory of Molecular and Cellular Biology of Ministry of Education, College of Life Science, Hebei Normal University, Hebei 050024, P.R. China
- Hebei Collaboration Innovation Center for Cell Signaling, Shijiazhuang, Hebei 050024, P.R. China
- Hebei Entry-Exit Inspection and Quarantine Bureau of China, Shijiazhuang, Hebei 050028, P.R. China
References
- ↑ 1.0 1.1 Li CH, Wang G, Zhao JL, Zhang LQ, Ai LF, Han YF, Sun DY, Zhang SW, Sun Y. The Receptor-Like Kinase SIT1 Mediates Salt Sensitivity by Activating MAPK3/6 and Regulating Ethylene Homeostasis in Rice. Plant Cell. 2014 Jun 6;26(6):2538-2553. [Epub ahead of print] PubMed PMID: 24907341; PubMed Central PMCID: PMC4114950.
