Abstract
Sunflower ( Helianthus annuus L.) seeds progressively lost their ability to germinate at 25°C, the optimal temperature for germination, after accelerated aging was carried out at 45°C (a temperature too high to permit germination) in water or at 76 or 100% relative humidity (RH). The deleterious effects of the high‐temperature treatment increased with increasing seed moisture content. Incubation of seeds at 45°C in water resulted in electrolyte leakage, which indicated a loss of membrane integrity. A relationship between leakage and loss of seed viability could not be assumed, since no increase in electrolyte efflux occurred after aging al 100% RH. Accelerated aging induced accumulation of malondialdehyde, suggesting that seed deterioration was associated with lipid peroxidation. However, there was no direct relationship between lipid peroxidation and deterioration in membrane integrity. Loss of seed viability was also associated with a decrease in superoxide dismutase, catalase and glutathione reductase activities. Finally, the results obtained suggest that sunflower seed deterioration during accelerated aging is closely related to a decrease in the activities of detoxifying enzymes and to lipid peroxidation.
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Claims 8
Claim · model-written summary
Aging at 45°C in water reduced seed germination at 25°C.
- Taxon
- Sunflower
Helianthus annuuse0 - Organ / stage
- seedse0
- Treatment
- accelerated aging was carried out at 45°C (a temperature too high to permit germination) in watere0
- Outcome
- ability to germinate at 25°Ce0
- Direction
- loste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sunflower ( Helianthus annuus L.) seeds progressively lost their ability to germinate at 25°C, the optimal temperature for germination, after accelerated aging was carried out at 45°C (a temperature too high to permit germination) in water or at 76 or 100% relative humidity (RH).”
Claim · model-written summary
Aging at 76% RH reduced seed germination at 25°C.
- Taxon
- SunflowerHelianthus annuuse0
- Organ / stage
- seedse0
- Treatment
- 76 or 100% relative humidity (RH)e0
- Outcome
- ability to germinate at 25°Ce0
- Direction
- loste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sunflower ( Helianthus annuus L.) seeds progressively lost their ability to germinate at 25°C, the optimal temperature for germination, after accelerated aging was carried out at 45°C (a temperature too high to permit germination) in water or at 76 or 100% relative humidity (RH).”
Claim · model-written summary
Higher seed moisture increased damage from high temperature.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- increasing seed moisture contente0
- Outcome
- deleterious effects of the high‐temperature treatmente0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The deleterious effects of the high‐temperature treatment increased with increasing seed moisture content.”
t0“sunflower seeds”
Claim · model-written summary
Incubation at 45°C in water caused electrolyte leakage.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- Incubation of seeds at 45°C in watere0
- Outcome
- electrolyte leakagee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Incubation of seeds at 45°C in water resulted in electrolyte leakage, which indicated a loss of membrane integrity.”
t0“sunflower seeds”
Claim · model-written summary
Aging at 100% RH did not increase electrolyte efflux.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- aging al 100% RHe0
- Outcome
- electrolyte effluxe0
- Direction
- no increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no increase in electrolyte efflux occurred after aging al 100% RH.”
t0“sunflower seeds”
Claim · model-written summary
Accelerated aging accumulated malondialdehyde.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- Accelerated aginge0
- Outcome
- accumulation of malondialdehydee0
- Direction
- accumulatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Accelerated aging induced accumulation of malondialdehyde”
t0“sunflower seeds”
Claim · model-written summary
Lipid peroxidation had no direct relationship with membrane deterioration.
- Taxon
- SunflowerHelianthus annuust0
- Organ / stage
- membranee0
- Outcome
- deterioration in membrane integritye0
- Direction
- no direct relationshipe0
- Qualifier
- lipid peroxidatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was no direct relationship between lipid peroxidation and deterioration in membrane integrity.”
t0“sunflower seeds”
Claim · model-written summary
Seed viability loss was associated with declining superoxide dismutase, catalase and glutathione reductase activities.
- Taxon
- SunflowerHelianthus annuust0
- Gene
- superoxide dismutase, catalase and glutathione reductasee0
- Outcome
- Loss of seed viabilitye0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Loss of seed viability was also associated with a decrease in superoxide dismutase, catalase and glutathione reductase activities.”
t0“sunflower seeds”
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property · growth · Helianthus annuus (common sunflower)Results agree
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See all 14 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.