Impact of copper on reactive oxygen species, lipid peroxidation and antioxidants in Lemna minor

Panda, Sanjib Kumar

doi:10.1007/s10535-008-0111-7

Cited by 36 publications

(11 citation statements)

References 26 publications

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“…On the other hand, treatment with Hg as well as Cd or Cr, increased ascorbic acid level in L. minor. Enhanced levels of ascorbic acid were also reported in L. minor treated with Cu [24], Zn treated Brassica juncea [46] and Hg exposed Bacopa monnieri [29]. In addition, Sinha et al [15] reported that in Cr treated Pistia stratioites, ascorbic acid concentration increased after 48 and 96 h of treatment but decreased after 144 h of exposure.…”

Section: Discussionmentioning

confidence: 79%

“…There are few studies of oxidative stress in duckweeds caused by heavy metal treatments in periods of 24 h or less [24][25][26]. These studies suggested that increased concentrations of Cu and Cd affected physiological and biochemical processes in L. minor by inducing oxidative stress, enhancing lipid peroxidation and regulating the antioxidative system.…”

Section: Discussionmentioning

confidence: 99%

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Short term exposure of Lemna minor and Lemna gibba to mercury, cadmium and chromium

2013

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The effects of mercury (Hg), cadmium (Cd) and chromium (Cr) in concentrations ranging from 0.02 to 20 mg L−1 applied for 24 h were assessed in Lemna minor and Lemna gibba by measuring changes in protein concentration, ascorbic acid, phenolics, malondialdehyde (MDA), hydrogen peroxide (H2O2), the activity of guaiacol peroxidase (G-POX) and catalase (CAT). Ascorbic acid, phenolics, catalase and guaiacol peroxidase played a key role in the antioxidative response of L. gibba. Inadequate activity of antioxidant enzymes in the L. minor resulted in MDA and H2O2 accumulation. In both used species, Hg treatment decreased protein content and increased CAT and G-POX activity, but decreased MDA and H2O2 levels. Cadmium and chromium had opposite impacts on two used Lemna species on almost all observed parameters. Enhanced antioxidative responses of L. gibba to lower concentrations of Hg, Cd and Cr indicated greater abiotic stress tolerance than L. minor.

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Section: Discussionmentioning

confidence: 79%

Section: Discussionmentioning

confidence: 99%

Short term exposure of Lemna minor and Lemna gibba to mercury, cadmium and chromium

2013

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“…Cu ion stress has been found to increase titers of antioxidants (ASA, proline and total phenols) (Panda 2008). In the present investigation significant production of ASA, total phenols and proline in Cu-stressed seedlings and their slight enhancement upon EBL and Put application alone or in combinations revealed high antioxidant activities of radish seedlings under Cu ion stress and normal conditions (Figs.…”

Section: Discussionmentioning

confidence: 99%

Enhancing effects of 24-epibrassinolide and Putrescine on the antioxidant capacity and free radical scavenging activity of Raphanus sativus seedlings under Cu ion stress

et al. 2010

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The present investigation recorded significant restoration of seedling growth (root length, shoot length and fresh weight) upon application of 24-epibrassinolide (EBL) and putrescine (Put) to 7-day-old seedlings of Raphanus sativus L. cv. Pusa chetki grown under copper (Cu) ion stress. EBL and Put with/or without Cu ion treated seedlings showed increased titers of ascorbic acid, total phenols and proline when compared with Cu-stressed seedlings. Differential responses in the activities of guaiacol peroxidase (GPOX) and catalase (CAT) were noted for EBL and Put alone or with/or without Cu ion treatment. Decreased activities of glutathione reductase (GR) and superoxide dismutase (SOD) noted for EBL and Put alone were observed to enhance significantly when applied in combination with Cu ion solution. A remarkable decrease in malondialdehyde contents was observed in seedlings treated with EBL and Put alone and with/or without Cu ion stress. Enhanced free radical scavenging activities were also recorded for seedlings given EBL and Put alone or in combination over Cu ion stressed seedlings. Maximum DPPH activity was observed in seedlings treated with Put and EBL 10 -9 M ? Put. Significant enhancements in deoxyribose and reducing power activities were too recorded for Put, EBL and Put ? 10 -9 M EBL treatments. Improved seedling growth, antioxidant levels (ascorbic acid, total phenols and proline) and enzymic (GPOX, CAT, SOD and GR) activities and free radical scavenging capacities along with reduced membrane damage in seedlings given EBL and Put with/or without Cu stress suggests significant and positive interactions of EBL and Put in alleviating the Cu ion induced oxidative damage in radish seedlings.

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“…Many reports on Cu 2+ stress have concentrated mainly on growth inhibition (including root inhibition), Cu accumulation in the organism, and antioxidant enzymes of plant leaves (Maksymiec and Krupa, 2007;Khatun et al, 2008;Wei et al, 2008), but there are far fewer on the responses of root antioxidant enzymes to copper stress (Panda, 2008;Kováèik et al, 2009;Madejón et al, 2009). L. perenne and F. arundinacea are common turfgrasses in north China.…”

Section: Introductionmentioning

confidence: 99%

Responses of Root Growth and Protective Enzymes to Copper Stress in Turfgrass

Zhao¹,

Liu²,

Qi³

et al. 2010

Acta Biologica Cracoviensia Series Botanica

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Root growth and protective enzymes of Festuca arundinacea L. and Lolium perenne L. under Cu stress were investigated in a hydroponic experiment. Cu stress significantly inhibited root growth (root elongation and dry biomass) of both turfgrasses. Malondialdehyde (MDA) content in roots of both turfgrasses markedly increased under copper stress. In F. arundinacea root, superoxide dismutase (SOD) activity increased greatly with increasing Cu concentration; peroxidase (POD) activity increased at low Cu level and decreased at high Cu level. Increased MDA content indicated the formation of free radicals under Cu stress, while increased SOD activity pointed to the operation of a scavenging mechanism. In roots of L. perenne, however, SOD and POD were not activated by copper. These results demonstrate that turfgrass cultivars clearly differ in tolerance to Cu stress, and that the tolerance depends largely on the enhanced activity of its antioxidant system. K Ke ey y w wo or rd ds s: : Copper stress, Festuca arundinacea L., Lolium perenne L., MDA, antioxidant enzyme.

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Impact of copper on reactive oxygen species, lipid peroxidation and antioxidants in Lemna minor

Cited by 36 publications

References 26 publications

Short term exposure of Lemna minor and Lemna gibba to mercury, cadmium and chromium

Short term exposure of Lemna minor and Lemna gibba to mercury, cadmium and chromium

Enhancing effects of 24-epibrassinolide and Putrescine on the antioxidant capacity and free radical scavenging activity of Raphanus sativus seedlings under Cu ion stress

Responses of Root Growth and Protective Enzymes to Copper Stress in Turfgrass

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