Xerophytes Info Sheet (desert plants)

Feb 3rd, 2012
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Gives key properties and adaptations of xerophytes and key examples of marram grass and a cactus to illustrate key points. Use of pictures and clearly structured notes suitable for post 16 study.

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Waterlossinplantscannotbeavoided.Plantsexchangegasesviatheirstomata. In order for gas exchange to work, the stomata remain openduring the day. Water vapour is lost via the stomata, down a watervapourpotentialgradient.AdaptationsofXerophytesWAXYCUTICLESreducesevaporationwaterprooflayerCLOSESTHESTOMATAtoreducewaterlosswhenlittleisavailableSMALLERLEAVEStoreducesurfacearealessevaporationPITS with stomata at the base satura

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