| Categories genes  | Tags root  growth  development  root development  auxin  stress  auxin transport  plasma membrane  reactive oxygen species  aluminium  transcription factor  grain  grain length  auxin response 
  • Information
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  • Genbank accession number

  • Key message
    • OsAUX3 expression in PRs, LRs and RHs further supports that OsAUX3 plays a critical role in the regulation of root development
    • OsAUX3 is upregulated in the root apex under aluminium (Al) stress and osaux3-2 is insensitive to Al treatments
    • Auxin concentrations, Al contents and Al-induced reactive oxygen species (ROS)-mediated damage in osaux3-2 under Al stress are lower than in WT, indicating that OsAUX3 is involved in Al-induced inhibition of root growth
    • OsAUX3 locates at the plasma membrane and functions as an auxin influx carrier affecting acropetal auxin transport
    • RNA-sequencing, gene expression quantification, dual-luciferase reporter assay, chromatin immunoprecipitation-quantitative polymerase chain reaction, and yeast one-hybrid assay demonstrated that OsARF6 is an upstream transcription factor of OsAUX3
    • OsARF6 directly binds to the auxin response elements of the OsAUX3 promoter, covering a single nucleotide polymorphism site between 9311 and NPB/Dongjin/Hwayoung, thereby controlling GL by altering longitudinal expansion and auxin distribution/content in glume cells
    • Herein, a quantitative trait locus qGL5 for grain length (GL) and GW was identified in recombinant inbred lines of 9311 and Nipponbare (NPB), and fine mapped to a candidate gene, OsAUX3
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