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Selenium alleviates cadmium toxicity by preventing oxidative stress in sunflower (Helianthus annuus) seedlings

The present study investigated the possible mediatory role of selenium (Se) in protecting plants from cadmium (Cd) toxicity. The exposure of sunflower seedlings to 20μM Cd inhibited biomass production, decreased chlorophyll and carotenoid concentrations and strongly increased accumulation of Cd in b... Full description

Journal Title: Journal of plant physiology 2014-03-01, Vol.171 (5), p.85-91
Main Author: Saidi, Issam
Other Authors: Chtourou, Yacine , Djebali, Wahbi
Format: Electronic Article Electronic Article
Language: English
Subjects:
Quelle: Alma/SFX Local Collection
Publisher: Germany: Elsevier GmbH
ID: ISSN: 0176-1617
Link: https://www.ncbi.nlm.nih.gov/pubmed/24484961
Zum Text:
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title: Selenium alleviates cadmium toxicity by preventing oxidative stress in sunflower (Helianthus annuus) seedlings
format: Article
creator:
  • Saidi, Issam
  • Chtourou, Yacine
  • Djebali, Wahbi
subjects:
  • Antioxidants
  • Antioxidants - pharmacology
  • Biological Transport
  • Cadmium
  • Cadmium - metabolism
  • Cadmium - toxicity
  • Chlorophyll
  • Dose-Response Relationship, Drug
  • Environmental Pollutants - metabolism
  • Environmental Pollutants - toxicity
  • Glutathione
  • Helianthus - drug effects
  • Helianthus - enzymology
  • Helianthus - growth & development
  • Helianthus - metabolism
  • Helianthus annuus
  • Oxidative damages
  • Oxidative stress
  • Oxidative Stress - drug effects
  • Peroxidase
  • Plant Leaves - drug effects
  • Plant Leaves - enzymology
  • Plant Leaves - growth & development
  • Plant Leaves - metabolism
  • Plant Roots - drug effects
  • Plant Roots - enzymology
  • Plant Roots - growth & development
  • Plant Roots - metabolism
  • Plant Shoots - drug effects
  • Plant Shoots - enzymology
  • Plant Shoots - growth & development
  • Plant Shoots - metabolism
  • Plants (organisms)
  • Prevention
  • Seedlings - drug effects
  • Seedlings - enzymology
  • Seedlings - growth & development
  • Seedlings - metabolism
  • Selenium
  • Selenium - pharmacology
  • Stresses
  • Sunflowers
  • Superoxide
  • Toxicity
ispartof: Journal of plant physiology, 2014-03-01, Vol.171 (5), p.85-91
description: The present study investigated the possible mediatory role of selenium (Se) in protecting plants from cadmium (Cd) toxicity. The exposure of sunflower seedlings to 20μM Cd inhibited biomass production, decreased chlorophyll and carotenoid concentrations and strongly increased accumulation of Cd in both roots and shoots. Similarly, Cd enhanced hydrogen peroxides content and lipid peroxidation as indicated by malondialdehyde accumulation. Pre-soaking seeds with Se (5, 10 and 20μM) alleviated the negative effect of Cd on growth and led to a decrease in oxidative injuries caused by Cd. Furthermore, Se enhanced the activities of catalase, ascorbate peroxidase and glutathione reductase, but lowered that of superoxide dismutase and guaiacol peroxidase. As important antioxidants, ascorbate and glutathione contents in sunflower leaves exposed to Cd were significantly decreased by Se treatment. The data suggest that the beneficial effect of Se during an earlier growth period could be related to avoidance of cumulative damage upon exposure to Cd, thus reducing the negative consequences of oxidative stress caused by heavy metal toxicity.
language: eng
source: Alma/SFX Local Collection
identifier: ISSN: 0176-1617
fulltext: fulltext
issn:
  • 0176-1617
  • 1618-1328
url: Link


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titleSelenium alleviates cadmium toxicity by preventing oxidative stress in sunflower (Helianthus annuus) seedlings
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descriptionThe present study investigated the possible mediatory role of selenium (Se) in protecting plants from cadmium (Cd) toxicity. The exposure of sunflower seedlings to 20μM Cd inhibited biomass production, decreased chlorophyll and carotenoid concentrations and strongly increased accumulation of Cd in both roots and shoots. Similarly, Cd enhanced hydrogen peroxides content and lipid peroxidation as indicated by malondialdehyde accumulation. Pre-soaking seeds with Se (5, 10 and 20μM) alleviated the negative effect of Cd on growth and led to a decrease in oxidative injuries caused by Cd. Furthermore, Se enhanced the activities of catalase, ascorbate peroxidase and glutathione reductase, but lowered that of superoxide dismutase and guaiacol peroxidase. As important antioxidants, ascorbate and glutathione contents in sunflower leaves exposed to Cd were significantly decreased by Se treatment. The data suggest that the beneficial effect of Se during an earlier growth period could be related to avoidance of cumulative damage upon exposure to Cd, thus reducing the negative consequences of oxidative stress caused by heavy metal toxicity.
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languageeng
publisherGermany: Elsevier GmbH
subjectAntioxidants ; Antioxidants - pharmacology ; Biological Transport ; Cadmium ; Cadmium - metabolism ; Cadmium - toxicity ; Chlorophyll ; Dose-Response Relationship, Drug ; Environmental Pollutants - metabolism ; Environmental Pollutants - toxicity ; Glutathione ; Helianthus - drug effects ; Helianthus - enzymology ; Helianthus - growth & development ; Helianthus - metabolism ; Helianthus annuus ; Oxidative damages ; Oxidative stress ; Oxidative Stress - drug effects ; Peroxidase ; Plant Leaves - drug effects ; Plant Leaves - enzymology ; Plant Leaves - growth & development ; Plant Leaves - metabolism ; Plant Roots - drug effects ; Plant Roots - enzymology ; Plant Roots - growth & development ; Plant Roots - metabolism ; Plant Shoots - drug effects ; Plant Shoots - enzymology ; Plant Shoots - growth & development ; Plant Shoots - metabolism ; Plants (organisms) ; Prevention ; Seedlings - drug effects ; Seedlings - enzymology ; Seedlings - growth & development ; Seedlings - metabolism ; Selenium ; Selenium - pharmacology ; Stresses ; Sunflowers ; Superoxide ; Toxicity
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descriptionThe present study investigated the possible mediatory role of selenium (Se) in protecting plants from cadmium (Cd) toxicity. The exposure of sunflower seedlings to 20μM Cd inhibited biomass production, decreased chlorophyll and carotenoid concentrations and strongly increased accumulation of Cd in both roots and shoots. Similarly, Cd enhanced hydrogen peroxides content and lipid peroxidation as indicated by malondialdehyde accumulation. Pre-soaking seeds with Se (5, 10 and 20μM) alleviated the negative effect of Cd on growth and led to a decrease in oxidative injuries caused by Cd. Furthermore, Se enhanced the activities of catalase, ascorbate peroxidase and glutathione reductase, but lowered that of superoxide dismutase and guaiacol peroxidase. As important antioxidants, ascorbate and glutathione contents in sunflower leaves exposed to Cd were significantly decreased by Se treatment. The data suggest that the beneficial effect of Se during an earlier growth period could be related to avoidance of cumulative damage upon exposure to Cd, thus reducing the negative consequences of oxidative stress caused by heavy metal toxicity.
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2Biological Transport
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6Chlorophyll
7Dose-Response Relationship, Drug
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25Plant Roots - enzymology
26Plant Roots - growth & development
27Plant Roots - metabolism
28Plant Shoots - drug effects
29Plant Shoots - enzymology
30Plant Shoots - growth & development
31Plant Shoots - metabolism
32Plants (organisms)
33Prevention
34Seedlings - drug effects
35Seedlings - enzymology
36Seedlings - growth & development
37Seedlings - metabolism
38Selenium
39Selenium - pharmacology
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titleSelenium alleviates cadmium toxicity by preventing oxidative stress in sunflower (Helianthus annuus) seedlings
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abstractThe present study investigated the possible mediatory role of selenium (Se) in protecting plants from cadmium (Cd) toxicity. The exposure of sunflower seedlings to 20μM Cd inhibited biomass production, decreased chlorophyll and carotenoid concentrations and strongly increased accumulation of Cd in both roots and shoots. Similarly, Cd enhanced hydrogen peroxides content and lipid peroxidation as indicated by malondialdehyde accumulation. Pre-soaking seeds with Se (5, 10 and 20μM) alleviated the negative effect of Cd on growth and led to a decrease in oxidative injuries caused by Cd. Furthermore, Se enhanced the activities of catalase, ascorbate peroxidase and glutathione reductase, but lowered that of superoxide dismutase and guaiacol peroxidase. As important antioxidants, ascorbate and glutathione contents in sunflower leaves exposed to Cd were significantly decreased by Se treatment. The data suggest that the beneficial effect of Se during an earlier growth period could be related to avoidance of cumulative damage upon exposure to Cd, thus reducing the negative consequences of oxidative stress caused by heavy metal toxicity.
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