Control of Ascorbate Peroxidase 2 expression by hydrogen peroxide and leaf water status during excess light stress reveals a functional organisation of Arabidopsis leaves.

@article{Fryer2003ControlOA,
  title={Control of Ascorbate Peroxidase 2 expression by hydrogen peroxide and leaf water status during excess light stress reveals a functional organisation of Arabidopsis leaves.},
  author={M. J. Fryer and Louise Ball and Kevin Oxborough and Stanisław Karpiński and Philip M Mullineaux and Neil R Baker},
  journal={The Plant journal : for cell and molecular biology},
  year={2003},
  volume={33 4},
  pages={691-705}
}
In Arabidopsis leaves, high light stress induces rapid expression of a gene encoding a cytosolic ascorbate peroxidase (APX2), whose expression is restricted to bundle sheath cells of the vascular tissue. Imaging of chlorophyll fluorescence and the production of reactive oxygen species (ROS) indicated that APX2 expression followed a localised increase in hydrogen peroxide (H2O2) resulting from photosynthetic electron transport in the bundle sheath cells. Furthermore, leaf transpiration rate also… CONTINUE READING
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