INVESTIGADORES
MIGLIORANZA Karina Silvia Beatriz
artículos
Título:
Organochlorine pesticide residues in leek (Allium porrum) Crops Grown on Untreated Soils from an Agricultural Environment
Autor/es:
GONZALEZ MARIANA; MIGLIORANZA KARINA SILVIA BEATRIZ; AIZPUN JULIA ELENA; MORENO VICTOR JORGE
Revista:
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Editorial:
American Chemical Society
Referencias:
Año: 2003 vol. 51 p. 5024 - 5029
ISSN:
0021-8561
Resumen:
Leek (Allium porrum) plants from organic farming were harvested at 15, 59, and 210 days after seed
germination. Organochlorine pesticide (OCP) levels were quantified by GC-ECD in vegetative tissues
(roots and aerial), bulk soil and rhizosphere. Leek plant bioaccumulate OCPs efficiently in their aerial
and root tissues and alter the concentration of the soil where they are grown. OCPs distribution
pattern of bulk soil was endosulfans > DDTs > dieldrin, while it was endosulfans > HCHs > DDTs
in leek tissues. There were statistically significant declines in DDTs, chlordane, dieldrin, and heptachlor
in the rhizosphere, indicating that recalcitrant residues of OCPs may be removed from contaminated
soil using leek crops under normal growing conditions. The DDE/DDT and R-/ç-HCH ratios of < 1
would indicate recent inputs of DDT and lindane in the environment. The occurrence of OCPs in this
farm could be the result of atmospheric deposition and/or surface runoff of these pesticides.