Excess copper induced oxidative stress and response of antioxidants in rice

Thounaojam, Thorny Chanu; Panda, Piyalee; Mazumdar, Purabi; Kumar, Dinesh; Sharma, G.; Sahoo, Lingaraj; Panda, Sanjib Kumar

doi:10.1016/j.plaphy.2012.01.006

Cited by 337 publications

(157 citation statements)

References 32 publications

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“…Since SOD acts as a primary agent in defence against oxidative stress, the changes observed herein emphasise that exposure to Cu induces stress responses that generate superoxide radicals in V. olympicum seedlings. Furthermore, our observations are consistent with those advanced by Thounaojam et al [38] and Devi & Prasad [39]. In this current study, the levels of SOD activity in the roots was greater than that in the leaves of V. olympicum seedlings suggesting that there is a higher level of oxidative stress in roots.…”

Section: Discussionsupporting

confidence: 93%

“…The increased levels of APX activity in V. olympicum seedlings indicates the importance of the ascorbate-glutathione (ASH-GSH) cycle in reducing the toxic effect of elevated Cu concentrations [40]. Thounaojam et al [38] reported that elevated APX activity acts to prevent the accumulation of toxic levels of H 2 O 2 in photosynthetic organelles and enhancement of APX activity has been observed in various plants such as rice, tea and mulberry under different treatment conditions with elevated Cu concentrations [38,41,42]. In addition to these changes in APX activity, the CAT activity in both the roots and leaves of V. olympicum seedlings decreased in growth condition with 500 µM Cu concentration (Figure 8).…”

Section: Discussionmentioning

confidence: 99%

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Antioxidative defense mechanism of the ruderal Verbascum olympicum Boiss. against copper (Cu)-induced stress

et al. 2016

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The endemic Verbascum olympicum has characteristics that allows it to live in degraded areas of Uludağ Mountain, Turkey and therefore known as a ruderal species. In this study, V. olympicum seeds collected from Uludağ Mountain were grown in the Hoagland nutrient solution, under hydroponic conditions. The activity of antioxidative enzymes (superoxide dismutase, SOD; catalase, CAT; ascorbate peroxidase, APX) were examined to demonstrate the role of antioxidative mechanism in the seedlings exposed to different Cu concentrations (0, 50, 250, 500 μM) for seven days. Also, certain growth parameters (such as the water content, biomass production, soluble protein), the level of lipid peroxidation, cell membrane injury and permeability were investigated. As a result, some toxic effects are observed following the application of 500 μM Cu, after the seedlings growing in 50 and 250 mM Cu concentrations showed high resistance and survived in hydroponic conditions. Our findings provide information about the resistance of V. Olympicum seedlings to oxidative stress caused by excessive Cu concentrations.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Antioxidative defense mechanism of the ruderal Verbascum olympicum Boiss. against copper (Cu)-induced stress

et al. 2016

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“…Mineral deficiencies are among the main stress factors affecting the activity of antioxidant enzymes [6]. In fact, Fe is the cofactor of catalase (CAT, EC 1.11.1.6), non-specific peroxidases (POD, EC 1.11.1.7), ascorbate peroxidase (APX, EC 1.11.1.11) and Fe superoxide dismutase (Fe-SOD, EC 1.15.1.1) [7,8], thus Fe deficiency can lead to a reduced effectiveness of the antioxidant system. Actually, Fe can lead to oxidative stress in plants not only when lacking, but also when present in excess, through the Fenton reactions [9].…”

Section: Introductionmentioning

confidence: 99%

Implication of Antioxidant Defence in Tolerance to Fe Deficiency of Pisum Sativum Leaves

Jelali¹

2017

JABB

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The intend of this work was to investigate whether some leaf parameters involved in the antioxidant mechanisms were differently expressed in two pea (Pisum sativum L.) cultivars characterized by different tolerance to Fe deficiency: cv. Kelvedon, tolerant and cv. Lincoln, susceptible. Both cultivars were grown in a full strength nutrient solution (C), in the absence of Fe (direct deficiency, DD) or in the presence of Fe and bicarbonate (induced deficiency, ID) for 12 days. Our results show that peroxidase activity and isoform expression increased in Kelvedon in both treatments, while it decreased in Lincoln plants grown in the presence of bicarbonate, suggesting the involvement of this activity improvement in Fe deficiency tolerance of pea plants. Interestingly, while only slight differences were reported between both cultivars under DD, the adaptation of Kelvedon under ID seems to be related, at least in part, to its greater ability to enhance the antioxidant defense at leaf level.

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“…Cr is known to induce production of elevated concentration of ROS resulted in macromolecule damage. Plants have evolved mechanisms to overcome ROS induced damage by accumulation of proline, ascorbate and glutathione and increasing the activities of SOD, CAT, GR, POX and APX (Samantaray et al, 1998;Nataraj et al, 2009, Thounaojam et al, 2012Tripathi et al 2012;). Antioxidants are the compounds, which act as osmotic buffers; beside this, they scavenge ROS (Nataraj and Paramar, 2008, Nataraj and Roshan, 2008, Nataraj et al, 2009.…”

Section: Introductionmentioning

confidence: 99%

Biochemical Changes under Chromium Stress on Germinating Seedlings of <i>Vigna radiata</i>

SUTHAR¹,

PANSURIYA²,

Kher

et al. 2014

Not Sci Biol

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Hexavalant chromium is considered the most toxic form because of its high solubility in water. Cr is known to induce production of elevated concentration of reactive oxygen species (ROS) resulted in macromolecule damage. Plants are having unique mechanisms to overcome ROS induced damage by accumulation of proline, ascorbate and glutathione and increasing the activities of antioxidant enzymes such as superoxide dismutase (SOD), catalase (CAT), glutathione reductase (GR), and ascorbate peroxidaes (APX), peroxidise (POX). In the present investigation effects of chromium on seed germination of Mung bean (Vigna radiata ‛Gujarat Mung-4') were studied. Seeds were treated with different Cr concentrations (50, 100, 150 and 200 μM) for seven days. On 7 th day root and shoot length was measured and activities of antioxidant enzyme SOD, APX, POX, CAT and GR were checked along with protein, proline and lipid peroxidation. It was observed that there is gradual decrease in shoot and root length with respect to the increase in Cr concentration. Level of lipid peroxidation significantly increased along with proline and antioxidant enzyme activity at higher Cr concentration. Lipid peroxidation is an indication of membrane damage due to elevated production of reactive oxygen species (ROS). To combat oxidative damage by ROS antioxidant enzyme activity increased significantly, which indicates that antioxidant enzymes (SOD, CAT, APX and GR) play a crucial role during Cr stress during germination of V. radiata.

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Excess copper induced oxidative stress and response of antioxidants in rice

Cited by 337 publications

References 32 publications

Antioxidative defense mechanism of the ruderal Verbascum olympicum Boiss. against copper (Cu)-induced stress

Antioxidative defense mechanism of the ruderal Verbascum olympicum Boiss. against copper (Cu)-induced stress

Implication of Antioxidant Defence in Tolerance to Fe Deficiency of Pisum Sativum Leaves

Biochemical Changes under Chromium Stress on Germinating Seedlings of <i>Vigna radiata</i>

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