Paper · 2003 · Biologia Plantarum

Heavy Metals Induce Lipid Peroxidation and Affect Antioxidants in Wheat Leaves

S.K. Panda; I. Chaudhury; M.H. Khan

6
claims
12
verbatim quotes
222
citations
1
research areas
✓
Open access

Abstract

The possible role of Zn and Cr as catalytic inducers of free radicals in wheat leaves was investigated. Treatment of excess heavy metals decreased the chlorophyll and carotenoid content in wheat leaves with the increase in time of excision. A sharp increase in proline accumulation was marked with the increase in metal concentration. Total peroxide content and lipid peroxidation measured as malondialdehyde content showed uniform increase under metal treatment in excised leaves. At almost all concentrations, catalase, guaiacol peroxidase and superoxide dismutase activities decreased with a minor increase in the earlier days of excision. Though glutathione content decreased ascorbate content showed significant increase in wheat leaves under heavy metal treatment.

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Claims 6

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Excess heavy metals decreased chlorophyll and carotenoid content over excision time.

Organ / stage
leavese0
Treatment
excess heavy metalse0
Outcome
chlorophyll and carotenoid contente0
Direction
decreasede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Treatment of excess heavy metals decreased the chlorophyll and carotenoid content in wheat leaves with the increase in time of excision.”

✓ located verbatim in the source · abstract, characters 104–240 · show in text ↑
t0

“Wheat”

✓ located verbatim in the source · title, characters 66–71 · show in text ↑
Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Proline accumulation increased sharply as metal concentration increased.

Treatment
metal concentratione0
Outcome
proline accumulatione0
Direction
increasee0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“A sharp increase in proline accumulation was marked with the increase in metal concentration.”

✓ located verbatim in the source · abstract, characters 241–334 · show in text ↑
t0

“Wheat”

✓ located verbatim in the source · title, characters 66–71 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Metal treatment increased total peroxide content and lipid peroxidation.

Organ / stage
excised leavese0
Treatment
metal treatmente0
Outcome
Total peroxide content and lipid peroxidatione0
Direction
increasee0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Total peroxide content and lipid peroxidation measured as malondialdehyde content showed uniform increase under metal treatment in excised leaves.”

✓ located verbatim in the source · abstract, characters 335–481 · show in text ↑
t0

“Wheat”

✓ located verbatim in the source · title, characters 66–71 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Catalase, guaiacol peroxidase and superoxide dismutase activities decreased at almost all metal concentrations, with a minor early increase.

Treatment
concentrationse0
Outcome
catalase, guaiacol peroxidase and superoxide dismutase activitiese0
Direction
decreasede0
Qualifier
minor increase in the earlier days of excisione0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“At almost all concentrations, catalase, guaiacol peroxidase and superoxide dismutase activities decreased with a minor increase in the earlier days of excision.”

✓ located verbatim in the source · abstract, characters 482–642 · show in text ↑
t0

“Wheat”

✓ located verbatim in the source · title, characters 66–71 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Glutathione content decreased under heavy metal treatment.

Treatment
heavy metal treatmente0
Outcome
glutathione contente0
Direction
decreasede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“glutathione content decreased ascorbate content showed significant increase in wheat leaves under heavy metal treatment.”

✓ located verbatim in the source · abstract, characters 650–770 · show in text ↑
t0

“Wheat”

✓ located verbatim in the source · title, characters 66–71 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Ascorbate content increased significantly under heavy metal treatment.

Treatment
heavy metal treatmente0
Outcome
ascorbate contente0
Direction
increasee0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“ascorbate content showed significant increase in wheat leaves under heavy metal treatment.”

✓ located verbatim in the source · abstract, characters 680–770 · show in text ↑
t0

“Wheat”

✓ located verbatim in the source · title, characters 66–71 · show in text ↑

heavy metal · physiology: pigments · Triticum aestivum (wheat)Positive and negative results

27 papers: 2 positive, 25 negative or no effect

24 papers in the same direction as this paper · 2 in the opposite direction

  1. positive
  2. positive
  3. negative

23 papers more in this group

See all 27 papers →

heavy metal · molecular: metabolites · Triticum aestivum (wheat)Positive and negative results

34 papers: 6 positive, 28 negative or no effect

5 papers in the same direction as this paper · 28 in the opposite direction

  1. no effect
  2. negative
  3. negative

30 papers more in this group

See all 34 papers →

Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.