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Effect of the Herbicides Terbuthylazine and Glyphosate on Photosystem II Photochemistry of Young Olive (Olea europaea) Plants

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Ana I. Cañero†, Lucía Cox*†, Susana Redondo-Gómez‡, Enrique Mateos-Naranjo‡, María C. Hermosín†, and Juan Cornejo†

^† Instituto de Recursos Naturales y Agrobiologia de Sevilla, CSIC, Reina Mercedes 10, 41012 Seville, Spain

^‡ Departamento de Biología Vegetal y Ecología, Facultad de Biología, Universidad de Sevilla, 1095, 41080 Seville, Spain

J. Agric. Food Chem., 2011, 59 (10), pp 5528–5534

DOI: 10.1021/jf200875u

Publication Date (Web): April 25, 2011

*Phone: +34-954624711. Fax: +34-954624002. E-mail: lcox@irnase.csic.es.

Funding Statement

This work has been partially financed by the Project AGL 2007-65771 from the Ministry of Science and Innovation of Spain (MINCIN) and Research Group AGR 264 of Junta de Andalucía. A.I.C. acknowledges her FPI fellowship from MINCIN.

Abstract

The purpose of this study was to understand the effect produced by the addition of the herbicides terbuthylazine (N²-tert-butyl-6-chloro-N⁴-ethyl-1,3,5-triazine-2,4-diamine) and glyphosate (N-(phosphonomethyl)glycine) on photosystem II photochemistry of young plants of Olea europaea L. under greenhouse conditions. The effect of soil amendment with an organic residue from olive oil production was also assessed. Terbuthylazine reduced the efficiency of photosystem II photochemistry of plants due to chronic photoinhibition, and this effect was counterbalanced by soil amendment with the organic waste, whereas the photosystem II photochemistry of olive plants was not affected by glyphosate or by glyphosate and organic waste addition. In this study, we have shown that the soil application of terbuthylazine is a source of indirect phytotoxicity for olive plants. We have also observed that the olive plants were not affected by higher amounts of glyphosate in the soil.

Keywords:

herbicide; Olea europaea; organic waste; chlorophyll fluorescence; photosynthesis

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History

Published In Issue May 25, 2011
Article ASAPMay 02, 2011
Just Accepted ManuscriptApril 25, 2011
Received: March 03, 2011
Accepted: April 25, 2011
Revised: April 20, 2011

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