Abstract
L.), a forage crop, is highly sensitive to soil Cd contamination. This study investigates the role of exogenous selenium (Se) in mitigating Cd-induced stress in alfalfa, using the 'Golden Empress' cultivar in a hydroponic system. Our results show that low Se concentrations (1 mg/L) significantly improved seed germination under Cd stress. Se enhanced antioxidant defense mechanisms by increasing superoxide dismutase (SOD) and peroxidase (POD) activities. Additionally, Se reduced malondialdehyde (MDA) accumulation by 38.2% under high Cd stress (50 mg/L). Se also facilitated osmotic balance restoration, with a 7.09-fold increase in proline content compared to the control. Furthermore, Se decreased Cd accumulation in roots and leaves by 38.6% and 27.4%, respectively. These findings suggest that Se mitigates Cd toxicity through enhanced antioxidant activity, osmoregulatory substance synthesis, and modulation of Cd distribution at the subcellular level. The optimal Se concentration varies with the severity of Cd stress.
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Claims 7
Claim · model-written summary
Low selenium at 1 mg/L significantly improved germination under cadmium stress.
- Taxon
- Medicago sativa L.
Medicago sativat0 - Treatment
- low Se concentrations (1 mg/L)e0
- Outcome
- seed germinatione0
- Direction
- improvede0
- Value
- 1 mg/Le0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low Se concentrations (1 mg/L) significantly improved seed germination under Cd stress.”
t0“Medicago sativa L.”
Claim · model-written summary
Selenium increased SOD and POD activities.
- Taxon
- Medicago sativa L.Medicago sativat0
- Treatment
- See0
- Outcome
- superoxide dismutase (SOD) and peroxidase (POD) activitiese0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Se enhanced antioxidant defense mechanisms by increasing superoxide dismutase (SOD) and peroxidase (POD) activities.”
t0“Medicago sativa L.”
Claim · model-written summary
Selenium reduced MDA accumulation by 38.2% under high cadmium stress.
- Taxon
- Medicago sativa L.Medicago sativat0
- Treatment
- See0
- Outcome
- malondialdehyde (MDA) accumulatione0
- Direction
- reducede0
- Value
- 38.2%e0
- Qualifier
- high Cd stress (50 mg/L)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Se reduced malondialdehyde (MDA) accumulation by 38.2% under high Cd stress (50 mg/L).”
t0“Medicago sativa L.”
Claim · model-written summary
Selenium increased proline content 7.09-fold relative to control.
- Taxon
- Medicago sativa L.Medicago sativat0
- Treatment
- See0
- Outcome
- proline contente0
- Direction
- increasee0
- Value
- 7.09-folde0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Se also facilitated osmotic balance restoration, with a 7.09-fold increase in proline content compared to the control.”
t0“Medicago sativa L.”
Claim · model-written summary
Selenium reduced root cadmium accumulation by 38.6%.
- Taxon
- Medicago sativa L.Medicago sativat0
- Organ / stage
- rootse0
- Treatment
- See0
- Outcome
- Cd accumulatione0
- Direction
- decreasede0
- Value
- 38.6%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Se decreased Cd accumulation in roots and leaves by 38.6% and 27.4%, respectively.”
t0“Medicago sativa L.”
Claim · model-written summary
Selenium reduced leaf cadmium accumulation by 27.4%.
- Taxon
- Medicago sativa L.Medicago sativat0
- Organ / stage
- leavese0
- Treatment
- See0
- Outcome
- Cd accumulatione0
- Direction
- decreasede0
- Value
- 27.4%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Se decreased Cd accumulation in roots and leaves by 38.6% and 27.4%, respectively.”
t0“Medicago sativa L.”
Claim · model-written summary
The optimal selenium concentration varies with cadmium stress severity.
- Taxon
- Medicago sativa L.Medicago sativat0
- Treatment
- severity of Cd stresse0
- Outcome
- optimal Se concentratione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The optimal Se concentration varies with the severity of Cd stress.”
t0“Medicago sativa L.”
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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.