The uptake and metabolism of fenitrothion by germinating white pine, white spruce and yellow birch seeds12

Autor:	R. Greenhalgh, D. J. Hallett, Pearl Weinberger, R. Prasad
Rok vydání:	1977
Předmět:	Yellow birch biology Chemistry food and beverages Primary metabolite General Medicine Metabolism Glutathione Desmethyl Secondary metabolite biology.organism_classification Pollution Fenitrothion Horticulture chemistry.chemical_compound Germination Botany medicine Food Science medicine.drug
Zdroj:	Journal of Environmental Science and Health, Part B. 12:53-69
ISSN:	1532-4109 0360-1234
DOI:	10.1080/03601237709372052
Popis:	The seeds of white pine, white spruce and yellow birch were stratified in the presence of fenitrothion (4 × 10‐5M) and then germinated. Fenitrothion was rapidly taken up by the conifer seeds during the first four days, whereas the uptake by birch reached a maximum after 14 days. Both fenitro‐oxon and desmethyl fenitrothion were detected as primary metabolites, the levels of both were highest in birch, 11 and 37 ppm, respectively. S‐methyl glutathion was isolated from white pine seeds treated with labelled fenitrothion, indicating the presence of a glutathion mediated alkyl transferase system in the seeds, which is responsible for the formation of desmethyl fenitrothion. NMR experiments suggested that the secondary metabolite S‐methyl fenitrothion results from the alkylation of desmethyl fenitrothion by excess fenitrothion by excess fenitrothion. A correlation was suggested between the level of glutathion in the seed and the ability to survive heavy doses of fenitrothion.
Databáze:	OpenAIRE
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