Abstract
Abstract Seedlings (72 or 48 days old) of Pelargonium × hortorum cv. Red Elite were grown in 1 experiment from the 6th leaf stage in controlled-environment (CE) rooms at 4 temperatures, including 2 split-night (SN) regimes and at 3 daily-light integrals; in a 2nd experiment they were grown at 2 temperatures including one SN regime, at 3 daily-light integrals, and with and without chlormequat soil drench. Each of the 2 night-temperature periods were of equal duration in the SN regimes. Plants grown under the SN regimes were either similar in growth and reproductive development to plants grown under constant night conditions, where the temperature was the mean of the 2 SN temperatures, or were generally intermediate in growth and development to plants grown throughout the night at each of the 2 temperatures used in the SN regime. A daily mean temperature of 20°C compared to 16.8° or 18° reduced the time between the 6th leaf and macrobud visible stages by 8 days. Leaf starch and sugar levels decreased as mean daily temperatures increased, but increased as daily-light integrals increased. Drenches of (2-chloroethyl)-trimethylammonium chloride (chlormequat) applied at the 6th leaf stage limited plant height and leaf area without influencing flowering date.
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Claims 6
Claim · model-written summary
Split-night temperatures produced growth and reproductive development similar to mean constant-night temperatures or intermediate between constant temperatures.
- Taxon
- Pelargonium × hortorum
Pelargonium ×hortorumt0 - Material
- Red Elitet1
- Treatment
- SN regimese0
- Outcome
- growth and reproductive developmente0
- Direction
- similare0
- Comparator
- constant night conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants grown under the SN regimes were either similar in growth and reproductive development to plants grown under constant night conditions, where the temperature was the mean of the 2 SN temperatures, or were generally intermediate in growth and development to plants grown throughout the night at each of the 2 temperatures used in the SN regime.”
t0“Pelargonium × hortorum”
t1“Red Elite”
Claim · model-written summary
A mean temperature of 20°C shortened the interval from sixth leaf to visible macrobud by 8 days relative to 16.8° or 18°.
- Taxon
- Pelargonium × hortorumPelargonium ×hortorumt0
- Treatment
- 20°Ce0
- Outcome
- time between the 6th leaf and macrobud visible stagese0
- Direction
- reducede0
- Value
- 8 dayse0
- Comparator
- 16.8° or 18°e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A daily mean temperature of 20°C compared to 16.8° or 18° reduced the time between the 6th leaf and macrobud visible stages by 8 days.”
t0“Pelargonium × hortorum”
Claim · model-written summary
Leaf starch and sugar levels decreased with increasing mean daily temperatures.
- Taxon
- Pelargonium × hortorumPelargonium ×hortorumt0
- Organ / stage
- Leafe0
- Treatment
- mean daily temperaturese0
- Outcome
- starch and sugar levelse0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf starch and sugar levels decreased as mean daily temperatures increased, but increased as daily-light integrals increased.”
t0“Pelargonium × hortorum”
Claim · model-written summary
Leaf starch and sugar levels increased with increasing daily-light integrals.
- Taxon
- Pelargonium × hortorumPelargonium ×hortorumt0
- Organ / stage
- Leafe0
- Treatment
- daily-light integralse0
- Outcome
- starch and sugar levelse0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf starch and sugar levels decreased as mean daily temperatures increased, but increased as daily-light integrals increased.”
t0“Pelargonium × hortorum”
Claim · model-written summary
Chlormequat drench limited height and leaf area.
- Taxon
- Pelargonium × hortorumPelargonium ×hortorumt0
- Organ / stage
- 6th leaf stagee0
- Treatment
- chlormequate0
- Outcome
- plant height and leaf areae0
- Direction
- limitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drenches of (2-chloroethyl)-trimethylammonium chloride (chlormequat) applied at the 6th leaf stage limited plant height and leaf area without influencing flowering date.”
t0“Pelargonium × hortorum”
Claim · model-written summary
Chlormequat drench did not alter flowering date.
- Taxon
- Pelargonium × hortorumPelargonium ×hortorumt0
- Organ / stage
- 6th leaf stagee0
- Treatment
- chlormequate0
- Outcome
- flowering datee0
- Direction
- without influencinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drenches of (2-chloroethyl)-trimethylammonium chloride (chlormequat) applied at the 6th leaf stage limited plant height and leaf area without influencing flowering date.”
t0“Pelargonium × hortorum”
The same questions in other papers
chlormequat chloride · phenology · Pelargonium x hortorum (zonal geranium)Positive and negative results
1 in the opposite direction
- positive
chlormequat chloride · growth · Pelargonium x hortorum (zonal geranium)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
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.