Effects of Glyphosate on Isolated Maize Mitochondria

López-Braña, I.; Delibes, A.; Garcı́a-Olmedo, Francisco

doi:10.1093/jxb/35.6.905

Cited by 5 publications

(1 citation statement)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…New experiments should be designed to follow H + efflux from intact roots after glyphosate treatment. There are, however, controversial results in the literature on the effects of glyphosate on ATPase activity in different cell systems (Lockau & Pfeffer, 1982; Lopez‐Brana et al ., 1984; Peixoto, 2005 and references therein).…”

Section: Discussionmentioning

confidence: 99%

Glyphosate inhibition of ferric reductase activity in iron deficient sunflower roots

et al. 2007

View full text Add to dashboard Cite

Iron (Fe) deficiency is increasingly being observed in cropping systems with frequent glyphosate applications. A likely reason for this is that glyphosate interferes with root uptake of Fe by inhibiting ferric reductase in roots required for Fe acquisition by dicot and nongrass species. This study investigated the role of drift rates of glyphosate (0.32, 0.95 or 1.89 mm glyphosate corresponding to 1, 3 and 6% of the recommended herbicidal dose, respectively) on ferric reductase activity of sunflower (Helianthus annuus) roots grown under Fe deficiency conditions. Application of 1.89 mm glyphosate resulted in almost 50% inhibition of ferric reductase within 6 h and complete inhibition 24 h after the treatment. Even at lower rates of glyphosate (e.g. 0.32 mm and 0.95 mm), ferric reductase was inhibited. Soluble sugar concentration and the NAD(P)H oxidizing capacity of apical roots were not decreased by the glyphosate applications. To our knowledge, this is the first study reporting the effects of glyphosate on ferric reductase activity. The nature of the inhibitory effect of glyphosate on ferric reductase could not be identified. Impaired ferric reductase could be a major reason for the increasingly observed Fe deficiency in cropping systems associated with widespread glyphosate usage.

show abstract

Section: Discussionmentioning

confidence: 99%