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THE GROWTH, LEAD ACCUMULATION AND OXIDATIVE STRESS RESPONSE OF Iris lactea var. chinensis UNDER LEAD STRESS.

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Title: THE GROWTH, LEAD ACCUMULATION AND OXIDATIVE STRESS RESPONSE OF Iris lactea var. chinensis UNDER LEAD STRESS.
Authors: Hai-yan Yuan1, Su-zhen Huang1 hsz1959@163.com, Yu-lin Han2, Zhi Guo3
Source: Fresenius Environmental Bulletin. 2013, Vol. 22 Issue 7, p1887-1894. 8p.
Subject Terms: *Disinfection & disinfectants, *Lead, Oxidative stress, Antioxidants, Detoxification (Substance abuse treatment)
Abstract: The present study aimed at investigating effects of lead (Pb) (30 and 300 mg L-1) stress on growth, Pb accumulation, antioxidative responses of Iris lactea var. chinensis over a 2-month period by hydroponic culture. The results show that the production rate of superoxide radical (O2-) and malondialdehyde (MDA) level in the leaves of I. lactea var. chinensis seedlings under 30 mg L-1 Pb stress remained almost unchanged, and hydrogen peroxide (H2O2) accumulation decreased as compared to the control whereas the activities of antioxidant enzymes and the contents of antioxidants investigated in shoots and roots increased. At the same time, low Pb concentrations promoted the growth of I. lactea var. chinensis seedlings. These results suggested that I. lactea var. chinensis had a strong oxidative ability to moderate Pb stress while high Pb levels (300 mg L-1) provoked oxidative stress and decreased superoxide dismutase (SOD) and peroxidase (POD) activities, especially those in the roots. In addition, high bioaccumulation of Pb was accompanied by an obvious decrease in dry weight. However, catalase (CAT) activities and glutathione (GSH) contents in shoots and roots exposed to 300 mg L-1 Pb were higher than the control. Therefore, CAT and GSH might play a major defense role in Pb detoxification when exposed to high Pb stress. [ABSTRACT FROM AUTHOR]
Copyright of Fresenius Environmental Bulletin is the property of PRT-Parlar Research & Technology and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: THE GROWTH, LEAD ACCUMULATION AND OXIDATIVE STRESS RESPONSE OF Iris lactea var. chinensis UNDER LEAD STRESS.
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  Data: <searchLink fieldCode="AR" term="%22Hai-yan+Yuan%22">Hai-yan Yuan</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Su-zhen+Huang%22">Su-zhen Huang</searchLink><relatesTo>1</relatesTo><i> hsz1959@163.com</i><br /><searchLink fieldCode="AR" term="%22Yu-lin+Han%22">Yu-lin Han</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Zhi+Guo%22">Zhi Guo</searchLink><relatesTo>3</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Fresenius+Environmental+Bulletin%22">Fresenius Environmental Bulletin</searchLink>. 2013, Vol. 22 Issue 7, p1887-1894. 8p.
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  Data: *<searchLink fieldCode="DE" term="%22Disinfection+%26+disinfectants%22">Disinfection & disinfectants</searchLink><br />*<searchLink fieldCode="DE" term="%22Lead%22">Lead</searchLink><br /><searchLink fieldCode="DE" term="%22Oxidative+stress%22">Oxidative stress</searchLink><br /><searchLink fieldCode="DE" term="%22Antioxidants%22">Antioxidants</searchLink><br /><searchLink fieldCode="DE" term="%22Detoxification+%28Substance+abuse+treatment%29%22">Detoxification (Substance abuse treatment)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The present study aimed at investigating effects of lead (Pb) (30 and 300 mg L-1) stress on growth, Pb accumulation, antioxidative responses of Iris lactea var. chinensis over a 2-month period by hydroponic culture. The results show that the production rate of superoxide radical (O2-) and malondialdehyde (MDA) level in the leaves of I. lactea var. chinensis seedlings under 30 mg L-1 Pb stress remained almost unchanged, and hydrogen peroxide (H2O2) accumulation decreased as compared to the control whereas the activities of antioxidant enzymes and the contents of antioxidants investigated in shoots and roots increased. At the same time, low Pb concentrations promoted the growth of I. lactea var. chinensis seedlings. These results suggested that I. lactea var. chinensis had a strong oxidative ability to moderate Pb stress while high Pb levels (300 mg L-1) provoked oxidative stress and decreased superoxide dismutase (SOD) and peroxidase (POD) activities, especially those in the roots. In addition, high bioaccumulation of Pb was accompanied by an obvious decrease in dry weight. However, catalase (CAT) activities and glutathione (GSH) contents in shoots and roots exposed to 300 mg L-1 Pb were higher than the control. Therefore, CAT and GSH might play a major defense role in Pb detoxification when exposed to high Pb stress. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Fresenius Environmental Bulletin is the property of PRT-Parlar Research & Technology and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 8
        StartPage: 1887
    Subjects:
      – SubjectFull: Disinfection & disinfectants
        Type: general
      – SubjectFull: Lead
        Type: general
      – SubjectFull: Oxidative stress
        Type: general
      – SubjectFull: Antioxidants
        Type: general
      – SubjectFull: Detoxification (Substance abuse treatment)
        Type: general
    Titles:
      – TitleFull: THE GROWTH, LEAD ACCUMULATION AND OXIDATIVE STRESS RESPONSE OF Iris lactea var. chinensis UNDER LEAD STRESS.
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            NameFull: Hai-yan Yuan
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            NameFull: Su-zhen Huang
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            NameFull: Yu-lin Han
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            NameFull: Zhi Guo
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            – D: 01
              M: 07
              Text: 2013
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              Y: 2013
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              Value: 22
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              Value: 7
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            – TitleFull: Fresenius Environmental Bulletin
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