The phenylurea cytokinin 4PU-30 protects maize plants against glyphosate action

Sergiev, Iskren; Alexieva, V.; Ivanov, Sergey; Moskova, Irina; Karanov, E.

doi:10.1016/j.pestbp.2006.01.001

Cited by 105 publications

(75 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…There was a statistically significant difference between the control and treatment groups (P<0.05) for MDA content. These observations are also in agreement with results reported by Sergiev et al (2006) and Miteve et al (2010) on the generation of lipid peroxidation products under glyphosate stress. These researchers reported a significantly increase in the MDA content in the root and leaves treated with different doses of glyphosate.…”

Section: Lipid Peroxidation (Mda Content)supporting

confidence: 94%

Investigation of toxic effects of the glyphosate on Allium cepa

Çavuşoğlu¹,

Yalçin²

2011

Tarım Bilimleri Dergisi

View full text Add to dashboard Cite

In the present study, toxic effects of glyphosate on Allium cepa L. (Amaryllidaceae) cells were investigated. For this aim, we used the germination percentage, root length, seedling weight, malondialdehyde (MDA) level, frequency of micronucleus (MN), chromosomal aberrations (CAs) and mitotic index (MI) as indicators of toxicity. In addition to the analyses mentioned above, we also examined changes in the root anatomy of A. cepa seeds treated with glyphosate. Glyphosate was applied with three different doses (100, 250 and 500 mg l -1 ). The results showed significant alterations in the germination percentage, root length, seedling weight, MDA level, MN, CAs and MI frequency depending on treatment doses in the glyphosate treated groups. Glyphosate-exposure significantly reduced the germination percentage, root length and seedling weight in all the treatment groups (P<0.05). But, an increase in the MN and CAs formation (P<0.05) was observed. It was also found that glyphosate has a mitodepressive action on mitosis, and the MI was decreased depending on the dose of applied-glyphosate (P<0.05). Besides, 100, 250 and 500 mg l -1 doses of glyphosate significantly enhanced the lipid peroxidation and caused an increase in malondialdehyde (MDA) levels at each dose treatment (P<0.05). Moreover, light micrographs showed anatomical damages such as unclear vascular tissue, unclear epidermis layer, cell deformation, unusual form of cell nucleus (usually flat) and binuclear cells. Each dose of glyphosate caused severe toxic effects on A. cepa cells and the strongest toxic effect was observed at the dose level of 500 mg l -1 .

show abstract

Section: Lipid Peroxidation (Mda Content)supporting

confidence: 94%

Investigation of toxic effects of the glyphosate on Allium cepa

Çavuşoğlu¹,

Yalçin²

2011

Tarım Bilimleri Dergisi

View full text Add to dashboard Cite

show abstract

“…In our study, plants submitted to glyphosate showed darker and thicker roots in relation to control (data not shown), recognized visual symptoms of stress [51][52][53]. Since glyphosate is known to induce oxidative damage in plants [54,55], we investigated oxidative stress markers to elucidate whether the process of glyphosate uptake by roots induces oxidative stress, and to evaluate the possible protective role of PO 4 3-in willow roots.…”

Section: Discussionmentioning

confidence: 62%

Impact of phosphate on glyphosate uptake and toxicity in willow

Gomes

Manac’h

Moingt

et al. 2016

Journal of Hazardous Materials

View full text Add to dashboard Cite

HighlightsPhosphate increased glyphosate uptake and decreased its toxicity in willows PO 4 3-concentrations ≥ 200 mg l -1 doubled glyphosate uptake by willow roots PO 4 3-concentrations ≥ 200 mg l -1 increased antioxidant system activity PO 4 3-maintained photosynthesis rates by inducing reactive oxygen species scavenging 3 Abstract Phosphate (PO 4 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 PO 4 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 1 mg l -1 ) and PO 4 3-(0, 200 and 400 mg l -1 ). We demonstrated that PO 4 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, PO 4 3-fertilization attenuated the herbicide's deleterious effects by increasing the activity of antioxidant systems and alleviating glyphosateinduced oxidative stress. Our results indicate that in addition to the glyphosate uptake, PO 4 3-is involved in glyphosate toxicity in willow by preventing glyphosate induced oxidative stress.

show abstract

“…For both horseweed biotypes there were reductions in photosynthetic rate after herbicide application, due to its effect on physiological mechanisms, such as photosynthesis, rubisco activity and proteins related to photosynthesis (Sergiev et al, 2006), although the binding of glyphosate occurs specifically on a metabolic target on the plant -in this case, the EPSPs enzyme. For the susceptible biotype, assessments subsequent to 7 DAH were not performed due to phytotoxic damage caused by herbicides.…”

Section: Resultsmentioning

confidence: 99%

Glyphosate influence on the physiological parameters of Conyza bonariensis biotypes

et al. 2014

View full text Add to dashboard Cite

-The objective of this study was to determine changes in gas exchange and inhibition of EPSPs, based on the accumulation of shikimic acid in horseweed biotypes resistant and sensitive to glyphosate. Two experiments were conducted in a factorial model. The first one evaluated horseweed biotypes (one resistant and one susceptible to glyphosate), and herbicide rates (0 and 1,080 g a.e. ha 1 ) applied on the weed. In the second experiment, the horseweed biotypes (susceptible and resistant to glyphosate) were evaluated in five periods as following: 0, 3, 7, 10, and 14 days after herbicide application (DAH). The photosynthetic rate, transpiration, carboxylation efficiency, and water efficiency were determined using an infrared gas analyzer (IRGA), and shikimic acid concentration by HPLC. The application of glyphosate damaged the photosynthetic parameters of the susceptible biotype, causing complete inhibition of the photosynthetic rate, transpiration rate, carboxylation efficiency and water use efficiency, starting from the 7 DAH. On the other hand, total inhibition of the photosynthetic parameters was not observed for the resistant biotype. Shikimic acid accumulation occurred in both biotypes after glyphosate application but the susceptible biotype had the highest concentrations, indicating greater sensitivity of the enzyme EPSPs. The accumulation of shikimic acid in the resistant biotype indicates that the mechanism of resistance is not related to the total insensitivity of the enzyme EPSPs to glyphosate and/or that other resistance mechanisms may be involved.Keywords: hairy fleabane, resistance, photosynthesis, EPSPs, shikimic acid. RESUMO -Objetivou-se neste trabalho determinar alterações na fotossíntese e na inibição da EPSPs

show abstract

The phenylurea cytokinin 4PU-30 protects maize plants against glyphosate action

Cited by 105 publications

References 30 publications

Investigation of toxic effects of the glyphosate on Allium cepa

Investigation of toxic effects of the glyphosate on Allium cepa

Impact of phosphate on glyphosate uptake and toxicity in willow

Glyphosate influence on the physiological parameters of Conyza bonariensis biotypes

Contact Info

Product

Resources

About