Abstract
Abstract Sunflower ( Helianthus annuus L.) seeds show more germination at high temperatures (25–30°C) than at temperatures below 20°C. Osmopriming with polyethylene glycol-6000 for 3–5 days at 15°C strongly increases germination at suboptimal temperatures. This stimulatory effect of priming persists after seed redrying and during subsequent storage at 20°C (55% RH) for at least 14 weeks. However, primed seeds deteriorate faster than untreated seeds during accelerated aging (45°C, 100% RH). The longer the priming treatment, the higher is the amount of germination but at the same time the higher is the sensitivity of seeds to accelerated aging. Priming enhances the respiratory activity of seeds transferred onto water and their ability to convert 1-aminocyclopropane-1-carboxylic acid (ACC) to ethylene. These effects remain after drying the seeds and are maintained in part during dry storage, whereas they disappear during accelerated aging. These results suggest that ACC-dependent ethylene production might be a good indicator of seed vigour; it increases with duration of priming and decreases very early during aging, well before significant loss of seed viability. Decrease in ACC conversion to ethylene indicates that aging is probably associated with membrane deterioration since in vivo ACC oxidase activity depends on membrane properties. However, no increase in electrolyte leakage is observed during aging.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 14
Claim · model-written summary
Sunflower seeds germinated more at 25–30°C than below 20°C.
- Taxon
- Helianthus annuus L.
Helianthus annuuse0 - Treatment
- high temperatures (25–30°C)e0
- Outcome
- germinatione0
- Direction
- moree0
- Comparator
- temperatures below 20°Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sunflower ( Helianthus annuus L.) seeds show more germination at high temperatures (25–30°C) than at temperatures below 20°C”
Claim · model-written summary
Osmopriming strongly increased germination at suboptimal temperatures.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- Osmopriming with polyethylene glycol-6000 for 3–5 days at 15°Ce0
- Outcome
- germinatione0
- Direction
- strongly increasese0
- Qualifier
- suboptimal temperaturese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower seeds”
e0“Osmopriming with polyethylene glycol-6000 for 3–5 days at 15°C strongly increases germination at suboptimal temperatures”
Claim · model-written summary
The priming benefit persisted after redrying and storage for at least 14 weeks.
- Taxon
- sunflowerHelianthus annuust0
- Outcome
- stimulatory effect of priminge0
- Qualifier
- after seed redrying and during subsequent storage at 20°C (55% RH) for at least 14 weekse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower seeds”
e0“This stimulatory effect of priming persists after seed redrying and during subsequent storage at 20°C (55% RH) for at least 14 weeks”
Claim · model-written summary
Primed seeds deteriorated faster during accelerated aging than untreated seeds.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- primede0
- Outcome
- deterioratee0
- Direction
- fastere0
- Qualifier
- accelerated aging (45°C, 100% RH)e0
- Comparator
- untreated seedse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower seeds”
e0“primed seeds deteriorate faster than untreated seeds during accelerated aging (45°C, 100% RH)”
Claim · model-written summary
Longer priming increased germination.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- priming treatmente0
- Outcome
- amount of germinatione0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower seeds”
e0“The longer the priming treatment, the higher is the amount of germination”
Claim · model-written summary
Longer priming increased sensitivity to accelerated aging.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- accelerated aginge0
- Outcome
- sensitivity of seeds to accelerated aginge0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower seeds”
e0“the higher is the sensitivity of seeds to accelerated aging”
Claim · model-written summary
Priming enhanced respiratory activity after seeds were transferred to water.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- Priminge0
- Outcome
- respiratory activity of seedse0
- Direction
- enhancese0
- Qualifier
- transferred onto watere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower seeds”
e0“Priming enhances the respiratory activity of seeds transferred onto water”
Claim · model-written summary
Priming enhanced ACC conversion to ethylene.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- Priminge0
- Outcome
- ability to convert 1-aminocyclopropane-1-carboxylic acid (ACC) to ethylenee0
- Direction
- enhancese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower seeds”
e0“Priming enhances the respiratory activity of seeds transferred onto water and their ability to convert 1-aminocyclopropane-1-carboxylic acid (ACC) to ethylene”
Claim · model-written summary
The respiratory and ACC-conversion effects remained after drying and partly during storage, then disappeared with accelerated aging.
- Taxon
- sunflowerHelianthus annuust0
- Outcome
- These effectse0
- Qualifier
- after drying the seeds and are maintained in part during dry storagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower seeds”
e0“These effects remain after drying the seeds and are maintained in part during dry storage, whereas they disappear during accelerated aging”
Claim · model-written summary
ACC-dependent ethylene production increased with priming duration.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- priminge0
- Outcome
- ACC-dependent ethylene productione0
- Direction
- increasese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower seeds”
e0“ACC-dependent ethylene production might be a good indicator of seed vigour; it increases with duration of priming”
Claim · model-written summary
ACC-dependent ethylene production decreased early in aging, before significant viability loss.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- aginge0
- Outcome
- ACC-dependent ethylene productione1
- Direction
- decreasese0
- Qualifier
- well before significant loss of seed viabilitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower seeds”
e0“decreases very early during aging, well before significant loss of seed viability”
e1“ACC-dependent ethylene production might be a good indicator of seed vigour”
Claim · model-written summary
The authors proposed ACC-dependent ethylene production as an indicator of seed vigour.
- Taxon
- sunflowerHelianthus annuust0
- Compound
- ACCe0
- Outcome
- seed vigoure0
- Qualifier
- good indicatore0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower seeds”
e0“ACC-dependent ethylene production might be a good indicator of seed vigour”
Claim · model-written summary
The authors inferred that aging may be associated with membrane deterioration from decreased ACC conversion.
- Taxon
- sunflowerHelianthus annuust0
- Outcome
- membrane deterioratione0
- Qualifier
- Decrease in ACC conversion to ethylenee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower seeds”
e0“Decrease in ACC conversion to ethylene indicates that aging is probably associated with membrane deterioration”
Claim · model-written summary
Electrolyte leakage did not increase during aging.
- Taxon
- sunflowerHelianthus annuust0
- Outcome
- electrolyte leakagee0
- Direction
- no increasee0
- Qualifier
- during aginge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower seeds”
e0“no increase in electrolyte leakage is observed during aging”
The same questions in other papers
drought · growth · Helianthus annuus (common sunflower)Results differ
8 papers in the same direction as this paper · 50 in the opposite direction
- negative
- negative
- negative
55 papers more in this group
See all 59 papers →seed treatment · growth · Helianthus annuus (common sunflower)Positive and negative results
48 papers in the same direction as this paper · 6 in the opposite direction
- negative
- positive
- positive
51 papers more in this group
See all 55 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.