An Adaptation to Xerophytic Conditions: The CAM Plants

  • David T. Dennis


Photosynthesis involves the exchange of carbon dioxide and oxygen which occurs through the stomata of the leaf epidermis. This exchange, however, also means that water is lost from the leaf, which can cause a problem for the plant. Normally, water loss is controlled by the closure of the stomata during water stress. However, for desert plants, opening the stomata during the day-when light is available for photosynthesiscould cause a potentially harmful loss ofwater . In some plants this problem has been overcome by segregating, on a temporal basis, the fixation and reduction of carbon dioxide.


Pentose Phosphate Crassulacean Acid Metabolism Desert Plant Leaf Epidermis Remove Carbon Dioxide 
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Copyright information

© Springer Science+Business Media New York 1987

Authors and Affiliations

  • David T. Dennis
    • 1
  1. 1.Queen’s UniversityKingstonUSA

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