Abstract
Four consecutive crops (Fall 1988, Winter 1989, Summer 1989 and Fall 1989) of exacum (Exacum affine Balf. f. ’Elfin’) and geranium (Pelargonium × hortorum L. H. Bailey ’Hollywood Star’ and ’Hollywood Red’) were grown in a greenhouse under three lighting treatments: ambient: 16-h high pressure sodium (HPS) lighting of 100 μmol m −2 s −1 between 0600 and 2200 h; and 16 h HPS-pulse lighting (45 s shut off, 90 s recharge) once every hour between 0600 and 2200 h. The growth index [(height × width)/2] of exacum plants was similar, regardless of the light treatment used. However the growth index of both geranium cultivars receiving HPS-pulse lighting was significantly less than those receiving the two other treatments. Exacum top dry weight was 225% greater under pulse lighting than under ambient light. During fall 1988, HPS-pulse lighting increased flower dry weight of Hollywood Red by 400% and 87% compared to ambient and HPS lighting, respectively. Key words: Exacum affine, HPS-pulse, Pelargonium × hortorum, photomorphogenesis, photosynthesis, photosynthetic photon flux
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 5
Claim · model-written summary
Exacum growth index was similar across lighting treatments.
ExacumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The growth index [(height × width)/2] of exacum plants was similar, regardless of the light treatment used”
Claim · model-written summary
Both geranium cultivars had significantly lower growth index under HPS pulse lighting than under the other treatments.
- Material
- both geranium cultivarse0
- Treatment
- HPS-pulse lightinge0
- Outcome
- growth indexe0
- Direction
- lesse0
- Comparator
- the two other treatmentse0
GeraniumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth index of both geranium cultivars receiving HPS-pulse lighting was significantly less than those receiving the two other treatments”
Claim · model-written summary
Exacum top dry weight was 225% greater under pulse lighting than ambient light.
- Treatment
- pulse lightinge0
- Outcome
- top dry weighte0
- Direction
- greatere0
- Value
- 225%e0
- Comparator
- ambient lighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exacum top dry weight was 225% greater under pulse lighting than under ambient light”
Claim · model-written summary
For Hollywood Red in fall 1988, HPS pulse lighting increased flower dry weight by 400% relative to ambient light.
- Material
- Hollywood Rede0
- Treatment
- HPS-pulse lightinge0
- Outcome
- flower dry weighte0
- Direction
- increasede0
- Value
- 400%e0
- Qualifier
- fall 1988e0
- Comparator
- ambiente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During fall 1988, HPS-pulse lighting increased flower dry weight of Hollywood Red by 400% and 87% compared to ambient and HPS lighting, respectively”
e1“geranium (Pelargonium × hortorum L. H. Bailey ’Hollywood Star’ and ’Hollywood Red’)”
Claim · model-written summary
For Hollywood Red in fall 1988, HPS pulse lighting increased flower dry weight by 87% relative to HPS lighting.
- Material
- Hollywood Rede0
- Treatment
- HPS-pulse lightinge0
- Outcome
- flower dry weighte0
- Direction
- increasede0
- Value
- 87%e0
- Qualifier
- fall 1988e0
- Comparator
- HPS lightinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During fall 1988, HPS-pulse lighting increased flower dry weight of Hollywood Red by 400% and 87% compared to ambient and HPS lighting, respectively”
e1“geranium (Pelargonium × hortorum L. H. Bailey ’Hollywood Star’ and ’Hollywood Red’)”
The same questions in other papers
light · growth · GeraniumPositive and negative results
6 papers in the same direction as this paper · 1 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- positive
5 papers more in this group
See all 9 papers →light · growth · ExacumResults agree
1 paper in the same direction as this paper
- 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.