Factors affecting the uptake of 14C-labeled organic chemicals by plants from soil
The uptake of /sup 14/C from various /sup 14/C-labeled organic chemicals from different chemical classes by barley and cress seedlings from soil was studied for 7 days in a closed aerated laboratory apparatus. Uptake by roots and by leaves via the air was determined separately. Although comparative long-term outdoor studies showed that an equilibrium is not reached within a short time period, plant concentration factors after 7 days could be correlated to some physicochemical and structural substance properties. Barley root concentration factors due to root uptake, expressed as concentration in roots divided by concentration in soil, gave a fairly good negative correlation to adsorption coefficients based on soil organic carbon. Barley root concentration factors, expressed as concentration in roots divided by concentration in soil liquid, gave a positive correlation to the n-octanol/water partition coefficients. Uptake of chemicals by barley leaves via air was strongly positively correlated to volatilization of chemicals from soil. Both root and foliar uptake by barley could be correlated well to the molecular weight of 14 chemicals. Uptake of chemicals by cress differed from that by barley, and correlations to physicochemical substance properties mostly were poor.
- Research Organization:
- Gesellschaft fuer Strahlen- und Umweltforschung mbH Muenchen, Neuherberg, Germany, F.R.
- OSTI ID:
- 5325064
- Journal Information:
- Ecotoxicol. Environ. Saf.; (United States), Vol. 2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
MUTAGENS
FOLIAR UPTAKE
ROOT ABSORPTION
BARLEY
BRASSICA
CARBON 14 COMPOUNDS
LIPIDS
MOLECULAR WEIGHT
SOILS
TRACER TECHNIQUES
UPTAKE
XENOBIOTICS
ABSORPTION
CEREALS
FOOD
GRASS
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
ORGANIC COMPOUNDS
PLANTS
VEGETABLES
560303* - Chemicals Metabolism & Toxicology- Plants- (-1987)