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Water Relations of Cadmium‐Treated Plants
Author(s) -
Kirkham M. B.
Publication year - 1978
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq1978.00472425000700030007x
Subject(s) - turgor pressure , transpiration , abscission , cadmium , chemistry , horticulture , chrysanthemum morifolium , dry weight , stomatal conductance , botany , nutrient , brassica , biology , photosynthesis , organic chemistry
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 µ g/ml Cd added as CdSO 4 . 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 µ g/ml Cd and lower in plants treated with 0, 0.1, and 1.0 µ g/ml Cd. Stomatal resistances were lowest in plants grown with 0.01 µ g/ml Cd and progressively higher in plants treated with 0, 0.1, and 1.0 µ g/ml Cd. Results indicated that quantities of Cd permitted in irrigation water in the United States (0.05 µ g/ml) might be detrimental to growth because of reduced turgor pressure and increased stomatal resistance.