An Arabidopsis quiescin-sulfhydryl oxidase regulates cation homeostasis at the root symplast-xylem interface.

@article{Alejandro2007AnAQ,
  title={An Arabidopsis quiescin-sulfhydryl oxidase regulates cation homeostasis at the root symplast-xylem interface.},
  author={Santiago Alejandro and Pedro L Rodriguez and Jos{\'e} Mar{\'i}a Bell{\'e}s and Lynne Yenush and Mar{\'i}a Jes{\'u}s Garc{\'i}a-S{\'a}nchez and Jos{\'e} Antonio Seoane Fern{\'a}ndez and Ram{\'o}n Serrano},
  journal={The EMBO journal},
  year={2007},
  volume={26 13},
  pages={3203-15}
}
A genetic screen of Arabidopsis 'activation-tagging' mutant collection based on tolerance to norspermidine resulted in a dominant mutant (par1-1D) with increased expression of the QSO2 gene (At1g15020), encoding a member of the quiescin-sulfhydryl oxidase (QSO) family. The par1-1D mutant and transgenic plants overexpressing QSO2 cDNA grow better than wild-type Arabidopsis in media with toxic cations (polyamines, Li(+) and Na(+)) or reduced K(+) concentrations. This correlates with a decrease in… CONTINUE READING

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