Abstract
Abstract: Sunflower (Helianthus annuus L.) is a relevant oilseed species used as feed in human and animal nutrition and in multiple industrial applications. However, oilseeds need to deal with the loss of vigor when used as a propagule, due to loss of seed physiological quality (viability and vigor) caused by deterioration events. We have evaluated in the present study the effects of seeds priming techniques (water, ascorbic acid, and sodium nitroprusside) on vigor, germination, antioxidant enzymes and membrane integrity of stored sunflower hybrid HELIO 251 seeds. Germination parameters showed that non-primed seeds (control) delayed germination in almost 72 h while all primed seeds germinated 100% in 24 h. Electrolyte leakage and malondialdehyde levels were higher in non-primed seeds indicating higher degree of membrane damage. An increase in the activity of catalase and ascorbate peroxidase was also observed after 8 h of imbibition of primed seeds compared to non-primed seeds. Regarding superoxide dismutase, there was no significant differences between treatments after 8 h of imbibition, whereas the highest activity was after 24 h of imbibition in non-primed seeds. Therefore, it can be concluded priming with ascorbic acid or sodium nitroprusside exhibited better performance in germination of stored sunflower seeds, probably resulting from lower accumulation of reactive oxygen species and consequent reduced oxidative damage due to an efficient antioxidant enzyme system.
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Claims 8
Claim · model-written summary
Non-primed sunflower seeds delayed germination by almost 72 hours.
- Taxon
- Sunflower
Helianthus annuust0 - Outcome
- germinatione0
- Direction
- delayede0
- Value
- almost 72 he0
- Comparator
- non-primed seeds (control)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“non-primed seeds (control) delayed germination in almost 72 h”
t0“sunflower seeds”
Claim · model-written summary
All primed seeds reached 100% germination in 24 hours.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- primed seedse0
- Outcome
- germinatede0
- Value
- 100% in 24 he0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all primed seeds germinated 100% in 24 h”
t0“sunflower seeds”
Claim · model-written summary
Electrolyte leakage and malondialdehyde were higher in non-primed seeds.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- non-primed seedse0
- Outcome
- Electrolyte leakage and malondialdehyde levelse0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Electrolyte leakage and malondialdehyde levels were higher in non-primed seeds”
t0“sunflower seeds”
Claim · model-written summary
Catalase and ascorbate peroxidase activities increased after 8 h in primed seeds versus non-primed seeds.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- primed seedse0
- Outcome
- activity of catalase and ascorbate peroxidasee0
- Direction
- increasee0
- Qualifier
- after 8 h of imbibitione0
- Comparator
- non-primed seedse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An increase in the activity of catalase and ascorbate peroxidase was also observed after 8 h of imbibition of primed seeds compared to non-primed seeds”
t0“sunflower seeds”
Claim · model-written summary
Superoxide dismutase did not differ significantly among treatments after 8 h.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- treatmentse0
- Outcome
- superoxide dismutasee0
- Direction
- no significant differencese0
- Comparator
- treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Regarding superoxide dismutase, there was no significant differences between treatments after 8 h of imbibition”
t0“sunflower seeds”
Claim · model-written summary
Superoxide dismutase activity was highest in non-primed seeds after 24 h.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- non-primed seedse0
- Outcome
- activitye0
- Direction
- higheste0
- Qualifier
- after 24 h of imbibitione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest activity was after 24 h of imbibition in non-primed seeds”
t0“sunflower seeds”
Claim · model-written summary
Ascorbic acid priming performed better for stored sunflower seed germination.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- priming with ascorbic acide0
- Outcome
- germination of stored sunflower seedse0
- Direction
- bettere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“priming with ascorbic acid or sodium nitroprusside exhibited better performance in germination of stored sunflower seeds”
Claim · model-written summary
Sodium nitroprusside priming performed better for stored sunflower seed germination.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- sodium nitroprussidee0
- Outcome
- germination of stored sunflower seedse0
- Direction
- bettere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“priming with ascorbic acid or sodium nitroprusside exhibited better performance in germination of stored sunflower seeds”
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