Abstract
In addition to various metabolic disorders, one of the consequences of manganese (Mn) toxicity is oxidative stress in plant species. The aim of this study was to evaluate the toxic mechanism associated with Mn exposure and to investigate the possible mediatory role of Se in protecting plants from Mn toxicity. The exposure of sunflower (Helianthus annuus) seedlings to 100 μM Mn inhibited biomass production, decreased chlorophyll (Chl) and carotenoids (Cars) contents and intensively increased the accumulation of Mn in both roots and shoots. Concomitantly, Mn application enhanced hydrogen peroxide (H2O2), protein carbonyl (PCO) content and lipid peroxidation as indicated by malondialdehyde (MDA) accumulation. Presoaking seeds with Se (5, 10 and 20 μM) alleviated the negative effect of Mn on plant growth parameters and led to a significant increase of Chl and Cars contents. Furthermore, Se application mitigated the oxidative damages as evidenced by the lowered H2O2, PCO and MDA contents and led to a decrease in oxidative injuries caused by Mn toxicity. Se particularly induced an increase in catalase (CAT), ascorbate peroxidase (APX) and glutathione peroxidase (GPX) activities accompanied by a significant reduction in SOD activities. Our study provides evidence that Se alleviated the Mn-induced oxidative stress in sunflower seedlings by enhancing the antioxidant defense system.
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Claims 10
Claim · model-written summary
Mn exposure inhibited seedling biomass production.
- Taxon
- sunflower (Helianthus annuus)
Helianthus annuuse0 - Treatment
- 100 μM Mne0
- Outcome
- biomass productione0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The exposure of sunflower (Helianthus annuus) seedlings to 100 μM Mn inhibited biomass production, decreased chlorophyll (Chl) and carotenoids (Cars) contents and intensively increased the accumulation of Mn in both roots and shoots.”
Claim · model-written summary
Mn exposure decreased chlorophyll and carotenoid contents.
- Taxon
- sunflower (Helianthus annuus)Helianthus annuuse0
- Treatment
- 100 μM Mne0
- Outcome
- chlorophyll (Chl) and carotenoids (Cars) contentse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The exposure of sunflower (Helianthus annuus) seedlings to 100 μM Mn inhibited biomass production, decreased chlorophyll (Chl) and carotenoids (Cars) contents and intensively increased the accumulation of Mn in both roots and shoots.”
Claim · model-written summary
Mn exposure increased Mn accumulation in roots and shoots.
- Taxon
- sunflower (Helianthus annuus)Helianthus annuuse0
- Organ / stage
- roots and shootse0
- Treatment
- 100 μM Mne0
- Outcome
- accumulation of Mne0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The exposure of sunflower (Helianthus annuus) seedlings to 100 μM Mn inhibited biomass production, decreased chlorophyll (Chl) and carotenoids (Cars) contents and intensively increased the accumulation of Mn in both roots and shoots.”
Claim · model-written summary
Mn application increased hydrogen peroxide and protein carbonyl contents and lipid peroxidation.
- Taxon
- sunflower (Helianthus annuus)Helianthus annuust0
- Treatment
- Mn applicatione0
- Outcome
- hydrogen peroxide (H2O2), protein carbonyl (PCO) content and lipid peroxidatione0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mn application enhanced hydrogen peroxide (H2O2), protein carbonyl (PCO) content and lipid peroxidation as indicated by malondialdehyde (MDA) accumulation.”
t0“sunflower (Helianthus annuus)”
Claim · model-written summary
Se seed presoaking alleviated Mn effects on plant growth parameters.
- Taxon
- sunflower (Helianthus annuus)Helianthus annuust0
- Treatment
- Presoaking seeds with Se (5, 10 and 20 μM)e0
- Outcome
- plant growth parameterse0
- Direction
- alleviatede0
- Qualifier
- negative effect of Mne0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Presoaking seeds with Se (5, 10 and 20 μM) alleviated the negative effect of Mn on plant growth parameters and led to a significant increase of Chl and Cars contents.”
t0“sunflower (Helianthus annuus)”
Claim · model-written summary
Se seed presoaking significantly increased chlorophyll and carotenoid contents.
- Taxon
- sunflower (Helianthus annuus)Helianthus annuust0
- Treatment
- Presoaking seeds with Se (5, 10 and 20 μM)e0
- Outcome
- Chl and Cars contentse0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Presoaking seeds with Se (5, 10 and 20 μM) alleviated the negative effect of Mn on plant growth parameters and led to a significant increase of Chl and Cars contents.”
t0“sunflower (Helianthus annuus)”
Claim · model-written summary
Se application lowered hydrogen peroxide, protein carbonyl, and malondialdehyde contents.
- Taxon
- sunflower (Helianthus annuus)Helianthus annuust0
- Treatment
- Se applicatione0
- Outcome
- H2O2, PCO and MDA contentse0
- Direction
- lowerede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Se application mitigated the oxidative damages as evidenced by the lowered H2O2, PCO and MDA contents and led to a decrease in oxidative injuries caused by Mn toxicity.”
t0“sunflower (Helianthus annuus)”
Claim · model-written summary
Se application decreased oxidative injuries due to Mn toxicity.
- Taxon
- sunflower (Helianthus annuus)Helianthus annuust0
- Treatment
- Se applicatione0
- Outcome
- oxidative injuriese0
- Direction
- decreasee0
- Qualifier
- caused by Mn toxicitye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Se application mitigated the oxidative damages as evidenced by the lowered H2O2, PCO and MDA contents and led to a decrease in oxidative injuries caused by Mn toxicity.”
t0“sunflower (Helianthus annuus)”
Claim · model-written summary
Se increased catalase, ascorbate peroxidase, and glutathione peroxidase activities.
- Taxon
- sunflower (Helianthus annuus)Helianthus annuust0
- Treatment
- See0
- Outcome
- catalase (CAT), ascorbate peroxidase (APX) and glutathione peroxidase (GPX) activitiese0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Se particularly induced an increase in catalase (CAT), ascorbate peroxidase (APX) and glutathione peroxidase (GPX) activities accompanied by a significant reduction in SOD activities.”
t0“sunflower (Helianthus annuus)”
Claim · model-written summary
Se significantly reduced SOD activity.
- Taxon
- sunflower (Helianthus annuus)Helianthus annuust0
- Treatment
- See0
- Outcome
- SOD activitiese0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Se particularly induced an increase in catalase (CAT), ascorbate peroxidase (APX) and glutathione peroxidase (GPX) activities accompanied by a significant reduction in SOD activities.”
t0“sunflower (Helianthus annuus)”
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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.