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THE CONTROL OF TRANSPIRATION. INSIGHTS FROM ARABIDOPSIS : (mrp5 mutant (**…

- - - - INHIBIT - rectifying K+ channels
      - ACTIVATE OUTWARD - rectfing K+ channels
        
        involved guard cell closure in arabidopsis is encoded by the GORK gene
- - - - inward-rectifying K+ channels
  - - - candidate transpiration regulators
      - reduced light- induced stomatal opening
      - reduced h2o lost from excised leaves
      - increase h2o content in leaves following drought stress
- - - - ROS inhibit ABI 1 activity
        
        ROS + OST 1 = upstream ABI 1 increase