CONTRATADOS
GIULIETTI Ana Maria
artículos
Título:
Removal of azinphosmethyl by alfalfa plants (Medicago sativa l.) grown in a soil less system
Autor/es:
FLOCCO, C.G.; CARRANZA, P.; CARVAJAL,L.G.; LOEWY,R.M; PECHEN DE D´ANGELO, A.M.; GIULIETTI, A.M.
Revista:
Science of the Total Environment
Editorial:
Elsevier
Referencias:
Año: 2004 vol. 327 p. 31 - 31
ISSN:
0048-9697
Resumen:
The objective of this study was to investigate the removal of azinphos methyl assisted by alfalfa plants, with special emphasis on the effects of this compound on some plant?s physiological parameters.Hydr oponic cultures of alfalfa (Medicago sativa L., var Romagnola) were employed as a model system.These cultures were exposed to a nutrient medium containing 10 mgyl of azinphos methyl.A first-order kinetic approach was used to describe the removal of azinphos methyl from the solution.After 20 days of culture, the initial amount of azinphos methyl was reduced to non-detectable levels in the presence of plants.In the absence of plants, 20% of azinphos methyl remained in the solution after 30 days of treatment. The half-life of the pesticide was reduced from 10.8 to 3.4 days in the presence of plants.The growth index of alfalfa plants exposed to azinphos methyl was negatively affected. Chlorophyll contents were reduced after 24 h of treatment and thereafter the levels were comparable to that of control plants.The peroxidase activity of alfalfa roots was not affected by the presence of azinphos methyl.In conclusion, alfalfa plants were able to survive when exposed to an effective concentration of 10 mgyl of azinphos methyl in the root zone, with some alterations on their physiological parameters.(Medicago sativa L., var Romagnola) were employed as a model system.These cultures were exposed to a nutrient medium containing 10 mgyl of azinphos methyl.A first-order kinetic approach was used to describe the removal of azinphos methyl from the solution.After 20 days of culture, the initial amount of azinphos methyl was reduced to non-detectable levels in the presence of plants.In the absence of plants, 20% of azinphos methyl remained in the solution after 30 days of treatment. The half-life of the pesticide was reduced from 10.8 to 3.4 days in the presence of plants.The growth index of alfalfa plants exposed to azinphos methyl was negatively affected. Chlorophyll contents were reduced after 24 h of treatment and thereafter the levels were comparable to that of control plants.The peroxidase activity of alfalfa roots was not affected by the presence of azinphos methyl.In conclusion, alfalfa plants were able to survive when exposed to an effective concentration of 10 mgyl of azinphos methyl in the root zone, with some alterations on their physiological parameters.yl of azinphos methyl.A first-order kinetic approach was used to describe the removal of azinphos methyl from the solution.After 20 days of culture, the initial amount of azinphos methyl was reduced to non-detectable levels in the presence of plants.In the absence of plants, 20% of azinphos methyl remained in the solution after 30 days of treatment. The half-life of the pesticide was reduced from 10.8 to 3.4 days in the presence of plants.The growth index of alfalfa plants exposed to azinphos methyl was negatively affected. Chlorophyll contents were reduced after 24 h of treatment and thereafter the levels were comparable to that of control plants.The peroxidase activity of alfalfa roots was not affected by the presence of azinphos methyl.In conclusion, alfalfa plants were able to survive when exposed to an effective concentration of 10 mgyl of azinphos methyl in the root zone, with some alterations on their physiological parameters.yl of azinphos methyl in the root zone, with some alterations on their physiological parameters.