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This article in JEQ

  1. Vol. 7 No. 3, p. 334-336
     
    Received: May 2, 1977


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doi:10.2134/jeq1978.00472425000700030007x

Water Relations of Cadmium-Treated Plants1

  1. M. B. Kirkham2

Abstract

Abstract

Turgor pressures, stomatal resistances, and transpiration rates were measured during a 50-day period in leaves of chrysanthemum (Chrysanthemum morifolium Ramat. ‘Indianapolis White’) plants grown in nutrient solution with 0, 0.01, 0.1, and 1.0 µg/ml Cd added as CdSO4. At harvest, dry weight and Cd concentrations in roots, stems, and leaves were determined. Leaf abscission occurred on Cd-treated plants. Turgor pressures were highest in plants grown with 0.01 µg/ml Cd and lower in plants treated with 0, 0.1, and 1.0 µg/ml Cd. Stomatal resistances were lowest in plants grown with 0.01 µg/ml Cd and progressively higher in plants treated with 0, 0.1, and 1.0 µg/ml Cd. Results indicated that quantities of Cd permitted in irrigation water in the United States (0.05 µg/ml) might be detrimental to growth because of reduced turgor pressure and increased stomatal resistance.

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