Cuticular behavior of cadmium studies using isolated plant cuticles
The cuticular retention and penetration of /sup 115m/Cd (metastable cadmium-115) were studied using isolated pear (Pyrus communis L. Passe Crassane) leaves, and apple (Malus pumila Mill. Akane) and tomato (Lycopersicon esculentum L.) fruit cuticles to obtain a better understanding of the behavior of Cd deposited on the aerial parts of plants. Results show that Cd, as CdCl/sub 2/, may be taken up by isolated cuticles. The mean value calculated from results obtained with different cuticular species was 1.4 ..mu..g/ Cd/cm/sup 2/ with CdCl/sub 2/ (11.8 mg Cd/L, pH approx. = 6). The cuticular retention depended greatly on the plant species when results are expressed on the basis of the dry weight. The study of the washing with water or exchange solutions suggests that the retention corresponds to a fraction sorbed as solute and to another fraction constituted by exchangeable Cd ions. At first it increased rapidly, then progressively tended to a saturation level as the concentration varied from 0.5 mg to 1.1 Cd/L. It was observed with dewaxed cuticles that the cuticular matrix was predominantly implicated in the retention. There appeared an interaction with Zn, suggesting a competition for the same sites of fixation. It was possible to reveal the cuticular penetration of Cd through intact cuticles; it was very slow but was greater with diluted HCl than with pure water as a receiver. These results are consistent with data obtained from experiments on the entire plants, showing that the greatest part of Cd deposited on leaves is recovered at the deposit place.
- Research Organization:
- Centre d'Etudes Nucleaires, Grenoble Cedex, France
- OSTI ID:
- 5972650
- Journal Information:
- J. Environ. Qual.; (United States), Journal Name: J. Environ. Qual.; (United States) Vol. 13:3; ISSN JEVQA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CADMIUM
CADMIUM 115
CADMIUM ISOTOPES
COUNTING TECHNIQUES
DATA
DAYS LIVING RADIOISOTOPES
ELEMENTS
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
FOLIAR UPTAKE
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOMERIC NUCLEI
ISOTOPE APPLICATIONS
ISOTOPES
METALS
NUCLEI
NUMERICAL DATA
PENETRATION DEPTH
PLANTS
RADIOISOTOPES
RETENTION
SCINTILLATION COUNTING
TRACER TECHNIQUES
UPTAKE