DAR2 acts as an important node connecting cytokinin, auxin, SHY2 and PLT1/2 in root meristem size control
Copyright policy )DAR2 acts as an important node connecting cytokinin, auxin, SHY2 and PLT1/2 in root meristem size control
Cytokinin and auxin antagonistically affect cell proliferation and differentiation and thus regulate root meristem size by influencing the abundance of SHORT HYPOCOTYL2 (SHY2/IAA3). SHY2 affects auxin distribution in the root meristem by repressing the auxin-inducible expression of PIN-FORMED (PIN) auxin transport genes. The PLETHORA (PLT1/2) genes influence root meristem growth by promoting stem cells and transit-amplifying cells. However, the factors connecting cytokinin, auxin, SHY2 and PLT1/2 are largely unknown. In a recent study, we have shown that the DA1-related protein 2 (DAR2) acts downstream of cytokinin and SHY2 but upstream of PLT1/2 to affect root meristem size. Here, we discuss the possible molecular mechanisms by which Arabidopsis DAR2 controls root meristem size.
- Chinese Academy of Sciences China (People's Republic of)
- Institute of Genetics and Developmental Biology China (People's Republic of)
- State Key Laboratory of Plant Cell and Chromosome Engineering China (People's Republic of)
DNA-Binding Proteins, Cytokinins, Indoleacetic Acids, Arabidopsis Proteins, Meristem, Arabidopsis, Nuclear Proteins, Transcription Factors
DNA-Binding Proteins, Cytokinins, Indoleacetic Acids, Arabidopsis Proteins, Meristem, Arabidopsis, Nuclear Proteins, Transcription Factors
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