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Revista Científica UDO Agrícola
Universidad de Oriente Press
ISSN: 1317-9152
Vol. 9, No. 4, 2009, pp. 802-806
Bioline Code: cg09096
Full paper language: Spanish
Document type: Research Article
Document available free of charge

Revista Científica UDO Agrícola, Vol. 9, No. 4, 2009, pp. 802-806

 en Effect of chloropyrifos on photosynthesis, transpiration and stomatal conductance of yerba mate ( Ilex paraguariensis check for this species in other resources A.St.-Hil.).
Castillo, Alicia Emilia; Sansberro, Pedro Alfonzo & Luna, Claudia Verónica

Abstract

The objective was to evaluate the effect of chlorpyrifos on stomatal conductance, photosynthesis and transpiration on yerba mate (Ilex paraguariensis A. St.-Hil.) plants. The experiment was conducted in a chamber under controlled conditions. The plants (one/pot) were sprayed with three doses (50, 100 and 150 ppm of chlorpyrifos) and a non pesticide-sprayed control. Stomatal conductance, photosynthesis and transpiration were evaluated at 1, 7 and 21 days after pesticide application. The mentioned traits were not affected by the pesticide application doses. However, significative differences were found as the plants were growing and traits increased between 7 and 21 days in 300% for stomatal conductance, 116% for photosynthesis and 285% for transpiration.

Keywords
Chlorpyrifos, vegetal physiology, photosynthetic rate, Ilex paraguariensis.

 
 es Influencia del plaguicida cloropirifos sobre la fotosíntesis, transpiración y conductancia estomática en yerba mate ( Ilex paraguariensis check for this species in other resources A. St.-Hil.)
Castillo, Alicia Emilia; Sansberro, Pedro Alfonzo & Luna, Claudia Verónica

Resumen

Este trabajo tuvo como objetivo observar los efectos del pesticida cloropirifos sobre la conductancia estomática, fotosíntesis y transpiración en yerba mate (Ilex paraguariensis A. St.-Hil.). Se realizó un ensayo en cámara con condiciones controladas y plantas de yerba mate, una por maceta, a las que se les aplicaron tres dosis de cloropirifos (50, 100 y 150 ppm) y un testigo sin pesticida. Uno, 7 y 21 días después de la aplicación se evaluaron la fotosíntesis, transpiración y conductancia estomática. Ninguna de las variables evaluadas fue afectada con las dosis aplicadas. Sin embargo, con la edad de las plantas incrementaron significativamente la conductancia estomática (300%), la fotosíntesis (116%) y la transpiración (285%) entre los 7 y 21 días.

Palabras-clave
Cloropirifos, fisiología vegetal, tasa fotosintética, yerba mate.

 
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