Abstract
Effect of photoperiod on flowering response and growth of 18 ornamental sunflower cultivars was evaluated. Plants were grown in a glasshouse under 16 h long day (LD) or 11.5 h short day (SD) conditions. In 12 of the cultivars tested (66.7%), visible flower bud stage was significantly earlier under the SD than under the LD. All of the cultivars flowered under both the SD and the LD conditions. However, 16 cultivars (88.9%) had a quantitative SD response, that is, their flowering was significantly delayed under LD. Delay of flowering under LD was variable among the cultivars, and was 14 days or greater in 11 of them. Photoperiod had no effect on flowering of ‘Jamboree’. This cultivar behaved clearly as a day-neutral (DN) plant. The cultivar ‘Sailor Moon’ showed a LD response; its flowering was earlier under LD. In 14 of the cultivars showing a SD response, photoperiod also influenced plant height, resulting in taller plants under LD. In the most of cultivars there was no effect of photoperiod on flower and stem diameters.
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Claims 8
Claim · model-written summary
Visible flower buds occurred significantly earlier under short days in 12 cultivars, 66.7% of those tested.
- Taxon
- Sunflower
Helianthus annuust0 - Treatment
- SDe0
- Outcome
- visible flower bud stagee0
- Direction
- earliere0
- Value
- 66.7%e0
- Qualifier
- 12 of the cultivars testede0
- Comparator
- LDe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 12 of the cultivars tested (66.7%), visible flower bud stage was significantly earlier under the SD than under the LD.”
t0“Sunflower”
Claim · model-written summary
All cultivars flowered under both short and long days.
- Taxon
- SunflowerHelianthus annuust0
- Outcome
- flowerede0
- Qualifier
- under both the SD and the LD conditionse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All of the cultivars flowered under both the SD and the LD conditions.”
t0“Sunflower”
Claim · model-written summary
Sixteen cultivars, 88.9%, showed quantitative short-day responses with significantly delayed flowering under long days.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- LDe0
- Outcome
- floweringe0
- Direction
- delayede0
- Value
- 88.9%e0
- Qualifier
- 16 cultivarse0
- Comparator
- SDe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“16 cultivars (88.9%) had a quantitative SD response, that is, their flowering was significantly delayed under LD.”
t0“Sunflower”
Claim · model-written summary
Long-day flowering delay varied among cultivars and reached at least 14 days in 11 cultivars.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- LDe0
- Outcome
- floweringe0
- Direction
- Delaye0
- Value
- 14 days or greatere0
- Qualifier
- in 11 of theme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Delay of flowering under LD was variable among the cultivars, and was 14 days or greater in 11 of them.”
t0“Sunflower”
Claim · model-written summary
Jamboree flowering was unaffected by photoperiod and the cultivar behaved as day-neutral.
- Taxon
- SunflowerHelianthus annuust0
- Material
- Jamboreee0
- Treatment
- Photoperiode0
- Outcome
- floweringe0
- Direction
- no effecte0
- Qualifier
- day-neutrale0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Photoperiod had no effect on flowering of ‘Jamboree’. This cultivar behaved clearly as a day-neutral (DN) plant.”
t0“Sunflower”
Claim · model-written summary
Sailor Moon flowered earlier under long days.
- Taxon
- SunflowerHelianthus annuust0
- Material
- Sailor Moone0
- Treatment
- LDe0
- Outcome
- floweringe0
- Direction
- earliere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cultivar ‘Sailor Moon’ showed a LD response; its flowering was earlier under LD.”
t0“Sunflower”
Claim · model-written summary
Fourteen short-day-responsive cultivars were taller under long days.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- LDe0
- Outcome
- plant heighte0
- Direction
- tallere0
- Qualifier
- 14 of the cultivars showing a SD responsee0
- Comparator
- SDe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 14 of the cultivars showing a SD response, photoperiod also influenced plant height, resulting in taller plants under LD.”
t0“Sunflower”
Claim · model-written summary
Photoperiod did not affect flower and stem diameters in most cultivars.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- photoperiode0
- Outcome
- flower and stem diameterse0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the most of cultivars there was no effect of photoperiod on flower and stem diameters.”
t0“Sunflower”
The same questions in other papers
light · phenology · Helianthus annuus (common sunflower)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
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.