Abstract
Phytosterols are allies in the control of plasma cholesterol and in preventing cardiovascular diseases. As vegetable oils are the main source of phytosterols, characterising environmental factors that determine phytosterols accumulation in the oil is an important objective. The present research focuses on evaluating how intercepted solar radiation (ISR, the main environmental factor affecting oil accumulation) can determine phytosterol accumulation in sunflower oil. The aim of this work was to study the dynamics of phytosterols accumulation under different ISR levels and its relationships with the dynamics of oil accumulation. Two field experiments were conducted with hybrids with different fatty acid composition. Treatments applied during grain filling were: two levels of defoliation (75% and 80%) and a control. A 50% grain thinning treatment was also applied. Oil phytosterols concentration increased with defoliation during grain-filling period, whereas phytosterols content per grain decreased. ß-sitosterol and campesterol were the most affected sterols. Reduction in ISR did not affect the rates of phytosterols accumulation. The durations of the accumulation period of these components varied in accordance with the duration of oil accumulation period. These results reinforce the importance of environmental factor in determining oil quality in sunflower grains.
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Claims 5
Claim · model-written summary
Oil phytosterol concentration increased with defoliation during the grain-filling period.
- Taxon
- sunflower
Helianthus annuust0 - Treatment
- defoliatione2
- Outcome
- Oil phytosterols concentratione2
- Direction
- increasede2
- Qualifier
- during grain-filling periode2
- Comparator
- a controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower grains”
e1“two levels of defoliation (75% and 80%) and a control”
e2“Oil phytosterols concentration increased with defoliation during grain-filling period”
Claim · model-written summary
Phytosterol content per grain decreased with defoliation.
- Taxon
- sunflowerHelianthus annuust0
- Organ / stage
- graine3
- Treatment
- defoliatione2
- Outcome
- phytosterols content per graine3
- Direction
- decreasede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower grains”
e2“Oil phytosterols concentration increased with defoliation during grain-filling period”
e3“whereas phytosterols content per grain decreased”
Claim · model-written summary
Beta-sitosterol and campesterol were the most affected sterols.
- Taxon
- sunflowerHelianthus annuust0
- Compound
- ß-sitosterol and campesterole4
- Outcome
- most affected sterolse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower grains”
e4“ß-sitosterol and campesterol were the most affected sterols”
Claim · model-written summary
Reduction in intercepted solar radiation did not affect the rates of phytosterol accumulation.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- Reduction in ISRe5
- Outcome
- rates of phytosterols accumulatione5
- Direction
- did not affecte5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower grains”
e5“Reduction in ISR did not affect the rates of phytosterols accumulation”
Claim · model-written summary
The duration of the phytosterol accumulation period varied with the duration of the oil accumulation period.
- Taxon
- sunflowerHelianthus annuust0
- Outcome
- durations of the accumulation periode6
- Qualifier
- in accordance with the duration of oil accumulation periode6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower grains”
e6“The durations of the accumulation period of these components varied in accordance with the duration of oil accumulation period”
The same questions in other papers
pruning · molecular: metabolites · Helianthus annuus (common sunflower)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
1 paper more in this group
See all 5 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.