Abstract
One-year-old plants of four cut rose ( Rosa hybrida L.) cultivars were grown under either natural or supplemental irradiance for 4 months during the winter in Colorado. Supplemental irradiance with high-pressure sodium (HPS) lamps was supplied at 100 μmol·m –2 ·s –1 for 10 h each night during off-peak electrical use periods. Total cut flower yield, stem length, and fresh weight of individual flowers were recorded. The number of flowers produced and fresh weight increased for all cultivars under the supplemental irradiance treatment. Flower count, stem length, and fresh weight showed significant differences among the four 4-week production periods; production differences were promoted through pinches of two stems per plant to time for holiday peaks. When production was highest, stem length and fresh weight were lower, most likely due to redistribution of the limited carbohydrate pool during the winter.
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Claims 9
Claim · model-written summary
Supplemental irradiance increased flower number in all four cut rose cultivars.
- Taxon
- Rosa hybrida L.
Rosa hybrid cultivart0 - Treatment
- supplemental irradiance treatmente0
- Outcome
- number of flowers producede0
- Direction
- increasede0
- Qualifier
- all cultivarse0
- Comparator
- naturale1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of flowers produced and fresh weight increased for all cultivars under the supplemental irradiance treatment.”
t0“Rosa hybrida L.”
e1“either natural or supplemental irradiance”
Claim · model-written summary
Supplemental irradiance increased flower fresh weight in all four cut rose cultivars.
- Taxon
- Rosa hybrida L.Rosa hybrid cultivart0
- Treatment
- supplemental irradiance treatmente0
- Outcome
- fresh weighte0
- Direction
- increasede0
- Qualifier
- all cultivarse0
- Comparator
- naturale1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of flowers produced and fresh weight increased for all cultivars under the supplemental irradiance treatment.”
t0“Rosa hybrida L.”
e1“either natural or supplemental irradiance”
Claim · model-written summary
Flower count differed significantly among four production periods.
- Taxon
- Rosa hybrida L.Rosa hybrid cultivart0
- Outcome
- Flower counte0
- Qualifier
- four 4-week production periodse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Flower count, stem length, and fresh weight showed significant differences among the four 4-week production periods”
t0“Rosa hybrida L.”
Claim · model-written summary
Stem length differed significantly among four production periods.
- Taxon
- Rosa hybrida L.Rosa hybrid cultivart0
- Outcome
- stem lengthe0
- Qualifier
- four 4-week production periodse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Flower count, stem length, and fresh weight showed significant differences among the four 4-week production periods”
t0“Rosa hybrida L.”
Claim · model-written summary
Fresh weight differed significantly among four production periods.
- Taxon
- Rosa hybrida L.Rosa hybrid cultivart0
- Outcome
- fresh weighte0
- Qualifier
- four 4-week production periodse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Flower count, stem length, and fresh weight showed significant differences among the four 4-week production periods”
t0“Rosa hybrida L.”
Claim · model-written summary
Pinching two stems per plant promoted production differences timed to holiday peaks.
- Taxon
- Rosa hybrida L.Rosa hybrid cultivart0
- Treatment
- pinches of two stems per plante0
- Outcome
- production differencese0
- Direction
- promotede0
- Qualifier
- holiday peakse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“production differences were promoted through pinches of two stems per plant to time for holiday peaks”
t0“Rosa hybrida L.”
Claim · model-written summary
Stem length was lower during the highest production period.
- Taxon
- Rosa hybrida L.Rosa hybrid cultivart0
- Outcome
- stem lengthe0
- Direction
- lowere0
- Comparator
- production was higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When production was highest, stem length and fresh weight were lower”
t0“Rosa hybrida L.”
Claim · model-written summary
Fresh weight was lower during the highest production period.
- Taxon
- Rosa hybrida L.Rosa hybrid cultivart0
- Outcome
- fresh weighte0
- Direction
- lowere0
- Comparator
- production was higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When production was highest, stem length and fresh weight were lower”
t0“Rosa hybrida L.”
Claim · model-written summary
The authors attribute lower stem length and fresh weight at peak production to redistribution of limited winter carbohydrates.
- Taxon
- Rosa hybrida L.Rosa hybrid cultivart0
- Outcome
- stem length and fresh weight were lowere0
- Qualifier
- redistribution of the limited carbohydrate pool during the wintere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“stem length and fresh weight were lower, most likely due to redistribution of the limited carbohydrate pool during the winter”
t0“Rosa hybrida L.”
The same questions in other papers
light · yield · Rosa hybrid cultivarPositive and negative results
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- no effect
- no effect
- positive
1 paper more in this group
See all 5 papers →light · growth · Rosa hybrid cultivarPositive and negative results
10 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- negative
- positive
9 papers more in this group
See all 13 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.