Physiological means of minimizing water loss in plants

  • Some rise the osmotic pressure of their roots e.g. taking up salts from the soil actively to increase the rate of water uptake to replace water lost
  • Some leaves reverse stomata rhythms closing stomata during day and open them at night
  • Some concentrate abscisic acid in their leaves to induce stomata closure during hot day.
  • Some close the stomata during bright light to reduce transpiration
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