GomesLeMoingtEtAl2016

Référence

Gomes, M.P., Le Manac'h, S.G., Moingt, M., Smedbol, E., Paquet, S., Labrecque, M., Lucotte, M., Juneau, P. (2016) Impact of phosphate on glyphosate uptake and toxicity in willow. Journal of Hazardous Materials, 304:269-279. (Scopus )

Résumé

Phosphate (PO4 3-) has been shown to increase glyphosate uptake by willow, a plant species known for its phytoremediation potential. However, it remains unclear if this stimulation of glyphosate uptake can result in an elevated glyphosate toxicity to plants (which could prevent the use of willows in glyphosate-remediation programs). Consequently, we studied the effects of PO4 3- on glyphosate uptake and toxicity in a fast growing willow cultivar (Salix miyabeana SX64). Plants were grown in hydroponic solution with a combination of glyphosate (0, 0.001, 0.065 and 1mgl-1) and PO4 3- (0, 200 and 400mgl-1). We demonstrated that PO4 3- fertilization greatly increased glyphosate uptake by roots and its translocation to leaves, which resulted in increased shikimate concentration in leaves. In addition to its deleterious effects in photosynthesis, glyphosate induced oxidative stress through hydrogen peroxide accumulation. Although it has increased glyphosate accumulation, PO4 3- fertilization attenuated the herbicide's deleterious effects by increasing the activity of antioxidant systems and alleviating glyphosate-induced oxidative stress. Our results indicate that in addition to the glyphosate uptake, PO4 3- is involved in glyphosate toxicity in willow by preventing glyphosate induced oxidative stress. © 2015.

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@ARTICLE { GomesLeMoingtEtAl2016,
    AUTHOR = { Gomes, M.P. and Le Manac'h, S.G. and Moingt, M. and Smedbol, E. and Paquet, S. and Labrecque, M. and Lucotte, M. and Juneau, P. },
    TITLE = { Impact of phosphate on glyphosate uptake and toxicity in willow },
    JOURNAL = { Journal of Hazardous Materials },
    YEAR = { 2016 },
    VOLUME = { 304 },
    PAGES = { 269-279 },
    NOTE = { cited By 0 },
    ABSTRACT = { Phosphate (PO4 3-) has been shown to increase glyphosate uptake by willow, a plant species known for its phytoremediation potential. However, it remains unclear if this stimulation of glyphosate uptake can result in an elevated glyphosate toxicity to plants (which could prevent the use of willows in glyphosate-remediation programs). Consequently, we studied the effects of PO4 3- on glyphosate uptake and toxicity in a fast growing willow cultivar (Salix miyabeana SX64). Plants were grown in hydroponic solution with a combination of glyphosate (0, 0.001, 0.065 and 1mgl-1) and PO4 3- (0, 200 and 400mgl-1). We demonstrated that PO4 3- fertilization greatly increased glyphosate uptake by roots and its translocation to leaves, which resulted in increased shikimate concentration in leaves. In addition to its deleterious effects in photosynthesis, glyphosate induced oxidative stress through hydrogen peroxide accumulation. Although it has increased glyphosate accumulation, PO4 3- fertilization attenuated the herbicide's deleterious effects by increasing the activity of antioxidant systems and alleviating glyphosate-induced oxidative stress. Our results indicate that in addition to the glyphosate uptake, PO4 3- is involved in glyphosate toxicity in willow by preventing glyphosate induced oxidative stress. © 2015. },
    AUTHOR_KEYWORDS = { Antioxidant enzymes; Fertilization; Herbicide; Phosphorus; Photosynthesis },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1016/j.jhazmat.2015.10.043 },
    KEYWORDS = { Antioxidants; Bioremediation; Oxidative stress; Phosphorus; Photosynthesis; Plants (botany); Toxicity; Weed control, Antioxidant enzyme; Antioxidant systems; Deleterious effects; Fertilization; Hydroponic solution; Phytoremediation potentials; Plant species; Remediation projects, Herbicides, antioxidant; glyphosate; hydrogen peroxide; phosphate; shikimic acid, bioaccumulation; concentration (composition); cultivar; deciduous tree; enzyme activity; fertilizer application; glyphosate; hydrogen peroxide; hydroponics; nutrient uptake; phosphate; photosynthesis; phytoremediation; toxicity test; translocation, Article; cultivar; hydroponics; nonhuman; oxidative stress; photosynthesis; phytoremediation; phytotoxicity; plant growth; plant leaf; plant root; willow, Salix; Salix miyabeana },
    SOURCE = { Scopus },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-84946600320&partnerID=40&md5=6ca06888fb2b125f3998f07cd4927761 },
}

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