title: Effect of the herbicides terbuthylazine and glyphosate on photosystem II photochemistry of young olive (Olea europaea) plants.
abstract: The purpose of this study was to understand the effect produced by the addition of the herbicides terbuthylazine (N(2)-tert-butyl-6-chloro-N(4)-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.
authors.affiliation: Instituto de Recursos Naturales y Agrobiologia de Sevilla, CSIC, Seville, Spain.
authors.forename: Ana I
authors.initials: AI
authors.lastname: Cañero
authors.forename: Lucía
authors.initials: L
authors.lastname: Cox
authors.forename: Susana
authors.initials: S
authors.lastname: Redondo-Gómez
authors.forename: Enrique
authors.initials: E
authors.lastname: Mateos-Naranjo
authors.forename: María C
authors.initials: MC
authors.lastname: Hermosín
authors.forename: Juan
authors.initials: J
authors.lastname: Cornejo
mesh_terms: D002734:Chlorophyll / Q000032:analysis; D005998:Glycine / Q000031:analogs & derivatives* / Q000032:analysis / Q000494:pharmacology; D006540:Herbicides / Q000008:administration & dosage / Q000494:pharmacology*; D031658:Olea / Q000737:chemistry / Q000378:metabolism*; D010788:Photosynthesis; D045332:Photosystem II Protein Complex / Q000187:drug effects*; D012987:Soil / Q000032:analysis; D014227:Triazines / Q000032:analysis / Q000494:pharmacology*; D000097797:Glyphosate
chemical_list: D002734:Chlorophyll; D005998:Glycine; D006540:Herbicides; D045332:Photosystem II Protein Complex; D012987:Soil; D014227:Triazines; D000097797:Glyphosate; C037565:terbutylazine