Abstract
Photosynthetic daily light integral (DLI) and temperature are two environmental factors that profoundly influence plant growth and development. Two common ornamental annual crops, salvia ( Salvia splendens F. Sello ex Roem & Schult.) and marigold ( Tagetes patula L.), were grown in glass greenhouses under a mean DLI of 5 to 25 mol·m −2 ·d −1 at temperatures from 14 to 27 °C. Growth (e.g., plant dry weight at flowering) and flowering characteristics (e.g., time to flowering and flower number) were modeled in response to the mean daily temperature and DLI by using multiple regression analysis. The rate of progress to flowering of salvia and marigold was primarily influenced by the mean air temperature. For example, time from seedling transplant to flowering of salvia decreased from 42 days to 24 days as temperature increased from 15 to 25 °C, with a mean DLI of 10 mol·m −2 ·d −1 . Flower number and plant dry weight on the date of first flowering generally decreased with increasing temperature and decreasing DLI in both species. For example, marigold plants grown at 15 °C and a mean DLI of 25 mol·m −2 ·d −1 were 2.45 times greater in dry weight, had 2.12 more flowers, and had 49% larger flowers at flowering compared with plants grown at 25 °C and a mean DLI of 5 mol·m −2 ·d −1 . The models can be used to predict the impact of changing light and temperature conditions on plant quality and flowering of these two crops.
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Claims 11
Claim · model-written summary
Mean air temperature primarily influenced progress to flowering in salvia.
SalviaNot reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rate of progress to flowering of salvia and marigold was primarily influenced by the mean air temperature.”
Claim · model-written summary
Mean air temperature primarily influenced progress to flowering in marigold.
Not reportedDirection
Verbatim
e0“The rate of progress to flowering of salvia and marigold was primarily influenced by the mean air temperature.”
Claim · model-written summary
Salvia time from transplant to flowering fell from 42 to 24 days as temperature rose from 15 to 25 °C at mean DLI 10 mol·m −2 ·d −1.
- Treatment
- temperature increased from 15 to 25 °Ce0
- Outcome
- time from seedling transplant to floweringe0
- Direction
- decreasede0
- Value
- 42 days to 24 dayse0
- Qualifier
- a mean DLI of 10 mol·m −2 ·d −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“time from seedling transplant to flowering of salvia decreased from 42 days to 24 days as temperature increased from 15 to 25 °C, with a mean DLI of 10 mol·m −2 ·d −1 .”
Claim · model-written summary
Flower number generally decreased with increasing temperature and decreasing DLI in salvia.
- Taxon
- Salvia splendens
Salvia splendenst0 - Treatment
- increasing temperature and decreasing DLIe0
- Outcome
- Flower numbere0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Flower number and plant dry weight on the date of first flowering generally decreased with increasing temperature and decreasing DLI in both species.”
t0“Salvia splendens”
Claim · model-written summary
Flower number generally decreased with increasing temperature and decreasing DLI in marigold.
- Taxon
- Tagetes patula
.jpg?width=60)
Tagetes patulat0 - Treatment
- increasing temperature and decreasing DLIe0
- Outcome
- Flower numbere0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Flower number and plant dry weight on the date of first flowering generally decreased with increasing temperature and decreasing DLI in both species.”
t0“Tagetes patula”
Claim · model-written summary
Dry weight at first flowering generally decreased with increasing temperature and decreasing DLI in salvia.
- Taxon
- Salvia splendensSalvia splendenst0
- Treatment
- increasing temperature and decreasing DLIe0
- Outcome
- plant dry weighte0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Flower number and plant dry weight on the date of first flowering generally decreased with increasing temperature and decreasing DLI in both species.”
t0“Salvia splendens”
Claim · model-written summary
Dry weight at first flowering generally decreased with increasing temperature and decreasing DLI in marigold.
- Taxon
- Tagetes patulaTagetes patulat0
- Treatment
- increasing temperature and decreasing DLIe0
- Outcome
- plant dry weighte0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Flower number and plant dry weight on the date of first flowering generally decreased with increasing temperature and decreasing DLI in both species.”
t0“Tagetes patula”
Claim · model-written summary
Marigold at 15 °C and DLI 25 had 2.45 times the dry weight of plants at 25 °C and DLI 5.
Verbatim
e0“marigold plants grown at 15 °C and a mean DLI of 25 mol·m −2 ·d −1 were 2.45 times greater in dry weight, had 2.12 more flowers, and had 49% larger flowers at flowering compared with plants grown at 25 °C and a mean DLI of 5 mol·m −2 ·d −1 .”
Claim · model-written summary
Marigold at 15 °C and DLI 25 had 2.12 more flowers than plants at 25 °C and DLI 5.
Verbatim
e0“marigold plants grown at 15 °C and a mean DLI of 25 mol·m −2 ·d −1 were 2.45 times greater in dry weight, had 2.12 more flowers, and had 49% larger flowers at flowering compared with plants grown at 25 °C and a mean DLI of 5 mol·m −2 ·d −1 .”
Claim · model-written summary
Marigold at 15 °C and DLI 25 had 49% larger flowers than plants at 25 °C and DLI 5.
Verbatim
e0“marigold plants grown at 15 °C and a mean DLI of 25 mol·m −2 ·d −1 were 2.45 times greater in dry weight, had 2.12 more flowers, and had 49% larger flowers at flowering compared with plants grown at 25 °C and a mean DLI of 5 mol·m −2 ·d −1 .”
Claim · model-written summary
The models can predict light and temperature impacts on plant quality and flowering in both crops.
- Taxon
- Salvia splendens and Tagetes patulaTagetes patulaSalvia splendenst0
- Outcome
- plant quality and floweringe0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The models can be used to predict the impact of changing light and temperature conditions on plant quality and flowering of these two crops.”
t0“Salvia splendens and Tagetes patula”
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See all 7 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.