Fluroxypyr triggers oxidative damage by producing superoxide and hydrogen peroxide in rice (Oryza sativa)

Wu, Guo Lin; Cui, Jing; Tao, Ling; Yang, Hong

doi:10.1007/s10646-009-0396-0

Cited by 140 publications

(57 citation statements)

References 37 publications

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“…Wheat plants treated with paraquat (Ekmekci & Terzioglu, 2005), of rice, with glyphosate (Ahsan et al, 2008) and fluroxipyr (Wu et al, 2010), and soybeans, with lactofen (Ferreira et al, 2010), also had an SOD increase. The elevation in SOD activity in response to the stress imposed by certain herbicides comes from the accumulation of ROS, especially under conditions that can lead to the death of a cell.…”

Section: Resultsmentioning

confidence: 99%

Biochemical and Physiological Changes in Rice Plants Due to the Application of Herbicides1

et al. 2016

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-The application of herbicides, even if selective, can cause biochemical and physiological changes, resulting in oxidative stress. This stress comes from the accumulation of reactive oxygen species produced due to exposure to the herbicide. However, plants have developed defense strategies, which can be enzymatic or non-enzymatic. The objective of this study was to evaluate the morphological and metabolic changes such as photosynthetic parameters, oxidative damage and antioxidant enzyme activity of rice plants after applying herbicides. For this, a study was conducted in a greenhouse and laboratory and the treatments consisted of application of imazapic + imazapyr, quinclorac, bentazon, cyhalofop-butyl, penoxsulan, bispyribac-sodium and carfentrazone-ethyl, in addition to control without herbicide. The phytotoxicity in plants was strong and there was a reduction in photosynthesis, stomatal conductance and efficiency of water use in plants treated with carfentrazone-ethyl. Furthermore, the application of carfentrazone-ethyl resulted in lower chlorophylls and carotenoids and increased lipid peroxidation and proline accumulation. Changes in the activity of enzymes belonging to the antioxidant system were inspected by applying herbicides. The application of herbicide alters the physiology of rice plants, triggering responses to oxidative stress, which are more pronounced when used carfentrazone-ethyl. Keywords:Oryza sativa, oxidative stress, lipid peroxidation, selectivity. RESUMO -

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Section: Resultsmentioning

confidence: 99%

Biochemical and Physiological Changes in Rice Plants Due to the Application of Herbicides1

et al. 2016

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“…Herbicides belonging to sulfonylureas have, as a primary effect, the inhibition of the acetolactate synthase (ALS) enzyme, chlorosis and necrosis and thus growth retardation (Oliveira Jr., 2011). In addition, side effects from ALS inhibition, such as synthesis interruption of amino acids valine, leucine and isoleucine, change in photosynthesis and respiration, also contribute to the damage and even death of the plants (Zhou et al, 2007). One study has evaluated the application of iodosulfuron mixed with mesosulfuron-methyl in increasing concentrations, and an increase of MDA content in wheat plants and reduction in stomatal conductance and photosynthetic rate were observed (Guo et al, 2009).…”

Section: Resultsmentioning

confidence: 99%

“…In a study conducted by Wu et al (2010), exposing rice plants to fluroxypyr (a herbicide from the group of synthetic auxins) has also suppressed the formation of chlorophyll, suggesting that this herbicide can be active in the transport chain of chloroplast electrons, changing the plants photosynthesis.…”

Section: Resultsmentioning

confidence: 99%

Changes in Photosynthesis and Oxidative Stress in Wheat Plants Submmited to Herbicides Application

et al. 2016

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-The use of herbicides, even in tolerant crops, can cause stress evidenced by increase phytotoxicity affecting growth and development. The objectives of this study were to evaluate herbicides effect from different mechanisms of action in photosynthetic and oxidative stress parameters, as well visual phytotoxicity and wild radish control in wheat crop, cultivar Quartzo. Two trials were conducted where the first one evaluated the photosynthetic parameters on wheat plants in two seasons collection, following the application of herbicides bentazon, clodinafop, iodosulfuron, metribuzin, metsulfuron and 2,4-D; and the second one evaluated wild radish (Raphanus sativus) control, wheat phytotoxicity and yield due to bentazon, iodosulfuron, metribuzin, metsulfuron and 2,4-D herbicides application. Photosynthetic rate, stomatal conductance and transpiration were negatively affected by metribuzin, metsulfuron and 2,4-D herbicides at 24 and 120 HAS (hours after spraying) compared to control. Oxidative stress was similar or lower to control, when herbicide was applied and, in general, there was no difference between application times. Lipid peroxidation, catalase activity and phenols were higher in the first collection time. The application of herbicides iodosulfuron and 2,4-D reduces chlorophylls and carotenoids in wheat. Herbicides bentazon, iodosulfuron, metribuzin, metsulfuron and 2,4-D are selective to wheat, cultivar Quartzo and do not affect wheat yield. 2,4-D, metribuzin and iodosulfuron are more efficient for wild radish control. Keywords

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“…There are reports that plants treated with paraquat (Ekmekci & Terzioglu 2005), fluroxypyr (Wu et al 2010) and atrazine (Zhang et al 2014) also showed an increase in the SOD activity, what may be linked to an increase in the superoxide radical formation, as well as to increases in gene and protein expression (Verma & Dubey 2003) by superoxide-mediated signal transduction (Fatima & Ahamad 2005).…”

Section: Resultsmentioning

confidence: 99%

Antioxidant activity of rice plants sprayed with herbicides

Nohatto

Agostinetto

Langaro

et al. 2016

Pesqui. Agropecu. Trop.

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Understanding the physiological defense behavior of plants subjected to herbicide application may help to identify products with higher or lower capacity to cause oxidative stress in crops. This study aimed at evaluating the effect of herbicides in the antioxidant activity of rice plants. The experimental design was completely randomized, with six replications. Treatments consisted of the herbicides bentazon (photosystem II inhibitor; 960 g ha-1), penoxsulam (acetolactate synthase inhibitor; 60 g ha-1), cyhalofop-butyl (acetyl coenzyme-A carboxylase inhibitor; 315 g ha-1) and a control. After the herbicides application, samples of rice shoots were collected at 12, 24, 48 and 96 hours after application (HAA). The components evaluated were hydrogen peroxide (H2O2), lipid peroxidation and activity of the antioxidant enzymes superoxide dismutase (SOD) and catalase (CAT). Bentazon (up to 24 HAA) and penoxsulam (48 and 96 HAA) reduced the CAT activity. Moreover, these herbicides increased the levels of H2O2, lipid peroxidation and SOD activity, indicating a condition of oxidative stress in rice plants. The cyhalofop-butyl herbicide did not alter the antioxidant activity, showing that it causes less stress to the crop.

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Fluroxypyr triggers oxidative damage by producing superoxide and hydrogen peroxide in rice (Oryza sativa)

Cited by 140 publications

References 37 publications

Biochemical and Physiological Changes in Rice Plants Due to the Application of Herbicides1

Biochemical and Physiological Changes in Rice Plants Due to the Application of Herbicides1

Changes in Photosynthesis and Oxidative Stress in Wheat Plants Submmited to Herbicides Application

Antioxidant activity of rice plants sprayed with herbicides

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