Lead-induced oxidative stress and metabolic alterations in Cassia angustifolia Vahl.

Qureshi, M. Irfan; Abdin, Malik Zainul; Qadir, Shaista; Iqbal, Muhammad

doi:10.1007/s10535-007-0024-x

Cited by 143 publications

(62 citation statements)

References 50 publications

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“…Pb is known to induce oxidative damage to higher plants (Qureshi et al 2007). In this study, the enhancement of H 2 O 2 and MDA concentrations in A. macrocephala showed that the oxidative stress and the peroxidation of membrane lipids were induced by Pb treatment (Figs.…”

Section: Discussionsupporting

confidence: 50%

“…Its increasing levels in soil environment inhibit seed germination and root growth of maize seedlings (Eun et al 2000). In addition, it is known to induce oxidative stress that cause damage to the biomolecules such as chloroplasts, soluble protein, proline, ascorbate, enzymes, etc (Verma and Dubey 2003;Qureshi et al 2007;Zhao et al 2009;Shu et al 2012).…”

Section: Introductionmentioning

confidence: 99%

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Effect of exogenous abscisic acid on the level of antioxidants in Atractylodes macrocephala Koidz under lead stress

Wang

Chen

Pan

2012

Environ Sci Pollut Res

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This study hypothesized that the positive or negative effects of exogenous abscisic acid (ABA) on oxidative stress caused by lead were dose dependent. The effects of different levels of ABA (2.5, 5, and 10 mg L −1 ) on lead toxicity in the leaves of Atractylodes macrocephala were studied by investigating plant growth, soluble sugars, proteins, lipid peroxidation, and antioxidative enzymes. Excess Pb inhibited root dry weight, root length, and the number of lateral roots, but increased shoot growth. In addition, lead stress significantly decreased the levels of chlorophyll pigments, protein, and activities of superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), and peroxidase (POD). Different levels of ABA significantly increased SOD, CAT, POD, and APX activities, but decreased the level of hydrogen peroxide and malondialdehyde in nonstressed plants. Exogenous application of 2.5 mg L −1 ABA detoxified the stress-generated damages caused by Pb and also enhanced plant growth, soluble sugars, proteins, and all four antioxidant enzyme activities but reduced Pb uptake of lead-stressed plant compared to lead treatment alone. However, the toxic effects of Pb were further increased by the applications of 5 and 10 mg L −1 ABA. The levels of antioxidants caused by a low concentration of exogenous ABA might be responsible for minimizing the Pb-induced toxicity in A. macrocephala.

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Section: Discussionsupporting

confidence: 50%

Section: Introductionmentioning

confidence: 99%

Effect of exogenous abscisic acid on the level of antioxidants in Atractylodes macrocephala Koidz under lead stress

Wang

Chen

Pan

2012

Environ Sci Pollut Res

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“…This is mostly universal oxide reductase that scavenges H 2 O 2 via a two-electron transfer producing O 2 and H 2 O (Lin and Kao, 2000). The major function of CAT is to metabolize the peroxide liberated in the peroxisome following the conversion of glycollate during photorespiration (Qureshi et al, 2007). In the present study, in shoots of Raphanus sativus, the decrease in CAT activity under Pb concentration indicating removal of H 2 O 2 and toxic peroxides and, in turn, the reduction in the free radical mediated lipid peroxidation under Pb toxicity.…”

Section: Pb Effects On Antioxidant Enzymesupporting

confidence: 49%

“…However, with increasing Pb level, reduction in CAT activity was observed, which has been attributed to the activation of the enzyme protein (Feieraband and Engel, 1986) and the decrease in enzyme synthesis (Mittler, 2002). The decrease in CAT activity could indicate its inactivation by accumulation of H 2 O 2 induced by lead in Cassia angustifolia (Qureshi et al, 2007).…”

Section: Pb Effects On Antioxidant Enzymementioning

confidence: 98%

Oxidative Stress Induction by Lead in Leaves of Radish (Raphanus sativus) Seedlings

et al. 2011

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Oxidative stress was induced by lead acetate (Pb) in Raphanus sativus seedlings grown in a hydroponic system using sand as substrate. Thirty day old acclimated seeds were treated for 7 days with five Pb levels (0 as control, 100, 200, 500 and 1000 mg l -1 ). Parameters such as growth, oxidative damage markers (lipid peroxidation, protein oxidation and hydrogen peroxide contents) and enzymatic activities of catalase (CAT) and peroxidase (POD) were investigated. Lead concentration in plant tissues increased with increasing of Pb levels. Shoot fresh weight, chlorophyll and carotenoid concentration were significantly decreased at 100 mg l -1 Pb. Lipid peroxidation, protein oxidation and H 2 O 2 levels were increased at 500 and 1000 mg l -1 Pb compared to control treatment, in shoots. Peroxidase activity showed a straight correlation with H 2 O 2 concentration, whereas CAT activity decreased only in shoots. These changes in enzymatic and non-enzymatic antioxidants showed that the Pb exposition had a significant disturbance on Raphanus sativus plantlets and affect the biochemical and physiological processes.

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“…The increased SOD levels lead to the over-production of H 2 O 2 . H 2 O 2 production during oxidative stress in plants is removed by CAT enzymes (Qureshi et al 2007). The probable greater activity of CAT in A. cepa suggests its larger role in the removal of H 2 O 2 (Nocter et al 2002).…”

Section: Biochemical Analysismentioning

confidence: 99%

The Effect of Lambda-Cyhalothrin on Root Tip Cytology, Pigment Contents and Antioxidant Defense System of <i>Allium cepa</i>

et al. 2014

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SummaryIn this study, toxic effects of the lambda-cyhalothrin (LCT) in Allium cepa L. cells were investigated. Toxic effects were investigated by analyzing the leaf contents and the cytologic and antioxidant parameters. To this aim, different doses of LCT were applied to Allium cepa L. samples. As a result, all doses of LCT treatment significantly decreased the leaf pigments compared to the control. The activity of superoxide dismutase, catalase and MDA level showed a concentration-time dependent decrease after treatment. It was also found that LCT has a mitodepressive action on mitosis and produced clastogenic and aneugenic types of abnormalities in Allium cepa with decreased mitotic index depending on the dose of LCT. The data obtained in this study showed that plant bioassays can be used as an important indicator to detect possible genotoxicity of chemicals.

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Lead-induced oxidative stress and metabolic alterations in Cassia angustifolia Vahl.

Cited by 143 publications

References 50 publications

Effect of exogenous abscisic acid on the level of antioxidants in Atractylodes macrocephala Koidz under lead stress

Effect of exogenous abscisic acid on the level of antioxidants in Atractylodes macrocephala Koidz under lead stress

Oxidative Stress Induction by Lead in Leaves of Radish (Raphanus sativus) Seedlings

The Effect of Lambda-Cyhalothrin on Root Tip Cytology, Pigment Contents and Antioxidant Defense System of <i>Allium cepa</i>

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