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The uptake of the K+ ions is balanced by different ways such as:

  1. When the entry of the Cl- ions take place into the guard cells so that it maintain the electrical difference that it neutralizes the K+ ions.
  2. H+ ions are transported to the subsidiary cells and the K+ ions are taken into the guard cells in exchange of the K+ ions and the process is known as the ion exchange method.
  3. The organic acids present such as the malic acid in the guard cells dissociate into malate ions and H+ ions.
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