Abstract
Abstract The oil and protein contents of sunflower seed are affected by water stress. Hullability is a seed quality trait which affects the efficiency of oil extrusion and the quality of the oil cake produced from the seed. Apart from cultivars, hullability is also affected by environmental conditions during seed filling. The effect of water stress, the major environmental factor for yield, on hullability is, however, unclear. The influence of an irrigated and a dryland treatment during the grain filling stage on seed composition, some physical seed properties including hullability, the potential oil and oil cake yield and the protein content of the oil cake of three cultivars was compared in a field trial. The relative water content of the leaves showed that the dryland treatment induced a mild to moderate stress compared to the irrigated treatment, which persisted for 25 days from the opening of the inflorescences. Seed yield was reduced by 23%, hullability by 14% and kernel oil content by 2.3% owing to this water stress. Seed yield did not differ amongst cultivars but all physical seed properties differed. The potential oil yield, oil cake yield and composition of the oil cake, however, were not affected by the water stress. Owing to the difference in seed composition and hullability, the potential oil yield, oil cake yield and protein content of the oil cake differed between cultivars. Keywords: seed qualityseed yieldsunflowerwater stress
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Claims 10
Claim · model-written summary
The dryland treatment caused mild to moderate leaf water stress versus irrigation for 25 days.
- Taxon
- sunflower
Helianthus annuust0 - Treatment
- dryland treatmente0
- Outcome
- relative water content of the leavese0
- Value
- 25 dayse0
- Qualifier
- mild to moderate stresse0
- Comparator
- irrigated treatmente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower seed”
e0“The relative water content of the leaves showed that the dryland treatment induced a mild to moderate stress compared to the irrigated treatment, which persisted for 25 days from the opening of the inflorescences”
Claim · model-written summary
Water stress reduced sunflower seed yield by 23%.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- water stresse0
- Outcome
- Seed yielde0
- Direction
- reducede0
- Value
- 23%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower seed”
e0“Seed yield was reduced by 23%, hullability by 14% and kernel oil content by 2.3% owing to this water stress”
Claim · model-written summary
Water stress reduced sunflower seed hullability by 14%.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- water stresse0
- Outcome
- hullabilitye0
- Direction
- reducede0
- Value
- 14%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower seed”
e0“Seed yield was reduced by 23%, hullability by 14% and kernel oil content by 2.3% owing to this water stress”
Claim · model-written summary
Water stress reduced sunflower kernel oil content by 2.3%.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- water stresse0
- Outcome
- kernel oil contente0
- Direction
- reducede0
- Value
- 2.3%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower seed”
e0“Seed yield was reduced by 23%, hullability by 14% and kernel oil content by 2.3% owing to this water stress”
Claim · model-written summary
Seed yield did not differ among sunflower cultivars.
- Taxon
- sunflowerHelianthus annuust0
- Material
- cultivarse0
- Outcome
- Seed yielde0
- Direction
- did not differe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower seed”
e0“Seed yield did not differ amongst cultivars”
Claim · model-written summary
All measured physical seed properties differed among sunflower cultivars.
- Taxon
- sunflowerHelianthus annuust0
- Material
- cultivarse1
- Outcome
- physical seed propertiese0
- Direction
- differede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower seed”
e0“all physical seed properties differed”
e1“Seed yield did not differ amongst cultivars but all physical seed properties differed”
Claim · model-written summary
Water stress did not affect potential oil yield and oil cake yield.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- water stresse0
- Outcome
- potential oil yield, oil cake yielde0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower seed”
e0“The potential oil yield, oil cake yield and composition of the oil cake, however, were not affected by the water stress”
Claim · model-written summary
Water stress did not affect oil cake composition.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- water stresse0
- Outcome
- composition of the oil cakee0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower seed”
e0“The potential oil yield, oil cake yield and composition of the oil cake, however, were not affected by the water stress”
Claim · model-written summary
Potential oil yield and oil cake yield differed among sunflower cultivars.
- Taxon
- sunflowerHelianthus annuust0
- Material
- cultivarse0
- Outcome
- potential oil yield, oil cake yielde0
- Direction
- differede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower seed”
e0“the potential oil yield, oil cake yield and protein content of the oil cake differed between cultivars”
Claim · model-written summary
Oil cake protein content differed among sunflower cultivars.
- Taxon
- sunflowerHelianthus annuust0
- Material
- cultivarse0
- Outcome
- protein content of the oil cakee0
- Direction
- differede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower seed”
e0“the potential oil yield, oil cake yield and protein content of the oil cake differed between cultivars”
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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.