Abstract
Transferring rice plants (Oryza sativa L. cv. Calrose) growing at 27/22�C to a range of dayhight temperatures 7 days after heading resulted in little variation in kernel size with temperature in the range from 24/19�C (mean 21.7�C) to 30/25�C (mean 26.7�C). This is close to the mean monthly temperature recorded for the rice growing areas of southern Australia during the period of kernel development. There was a significant drop in kernel dry weight with a further increase in temperature to 33/28�C and 39/24�C. When plants were transferred to a temperature of 36/31�C for periods of 8 days, commencing at regular intervals from heading, the greatest change in dry weight of the kernels occurred when the treatment commenced 12 days after heading and the kernels were in the linear phase of dry matter accumulation. The flow of nitrogen into kernels was more stable than that of carbon as temperatures were increased, with little change in nitrogen (mg) per kernel until the temperature was greater than 33/28�C. Changes in temperature away from the optimum (27/22�C) always resulted in an increase in the concentration of kernel nitrogen. The greatest reduction in kernel nitrogen (mg kernel-1), like that of carbon, occurred in high temperature treatments commencing 12 days after heading.
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Claims 8
Claim · model-written summary
Kernel size varied little from 24/19�C to 30/25�C.
- Taxon
- rice
Oryza sativae0 - Material
- Oryza sativa L. cv. Calrosee0
- Treatment
- range of dayhight temperaturese0
- Outcome
- kernel sizee0
- Direction
- little variatione0
- Qualifier
- 7 days after headinge0
- Comparator
- 27/22�Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Transferring rice plants (Oryza sativa L. cv. Calrose) growing at 27/22�C to a range of dayhight temperatures 7 days after heading resulted in little variation in kernel size with temperature in the range from 24/19�C (mean 21.7�C) to 30/25�C (mean 26.7�C)”
Claim · model-written summary
Kernel dry weight dropped significantly at 33/28�C and 39/24�C.
- Taxon
- RiceOryza sativat0
- Treatment
- 33/28�C and 39/24�Ce0
- Outcome
- kernel dry weighte0
- Direction
- drope0
- Comparator
- further increase in temperaturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a significant drop in kernel dry weight with a further increase in temperature to 33/28�C and 39/24�C”
t0“Rice”
Claim · model-written summary
An eight-day 36/31�C treatment had the greatest effect on kernel dry weight when begun 12 days after heading.
- Taxon
- RiceOryza sativat0
- Treatment
- 36/31�Ce0
- Outcome
- dry weight of the kernelse0
- Direction
- greatest changee0
- Qualifier
- 12 days after headinge0
- Comparator
- commencing at regular intervals from headinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When plants were transferred to a temperature of 36/31�C for periods of 8 days, commencing at regular intervals from heading, the greatest change in dry weight of the kernels occurred when the treatment commenced 12 days after heading and the kernels were in the linear phase of dry matter accumulation”
t0“Rice”
Claim · model-written summary
Nitrogen per kernel changed little until temperatures exceeded 33/28�C.
- Taxon
- RiceOryza sativat0
- Treatment
- temperaturee0
- Outcome
- nitrogen (mg) per kernele0
- Direction
- little changee0
- Qualifier
- greater than 33/28�Ce0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“little change in nitrogen (mg) per kernel until the temperature was greater than 33/28�C”
t0“Rice”
Claim · model-written summary
Nitrogen flow into kernels was more stable than carbon flow with increasing temperature.
- Taxon
- RiceOryza sativat0
- Outcome
- flow of nitrogen into kernelse0
- Direction
- more stablee0
- Comparator
- that of carbone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The flow of nitrogen into kernels was more stable than that of carbon as temperatures were increased”
t0“Rice”
Claim · model-written summary
Temperatures away from 27/22�C increased kernel nitrogen concentration.
- Taxon
- RiceOryza sativat0
- Treatment
- Changes in temperaturee0
- Outcome
- concentration of kernel nitrogene0
- Direction
- increasee0
- Comparator
- 27/22�Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Changes in temperature away from the optimum (27/22�C) always resulted in an increase in the concentration of kernel nitrogen”
t0“Rice”
Claim · model-written summary
The greatest reduction in kernel nitrogen amount occurred when high-temperature treatment began 12 days after heading.
- Taxon
- RiceOryza sativat0
- Treatment
- high temperature treatmentse0
- Outcome
- kernel nitrogen (mg kernel-1)e0
- Direction
- greatest reductione0
- Qualifier
- 12 days after headinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The greatest reduction in kernel nitrogen (mg kernel-1), like that of carbon, occurred in high temperature treatments commencing 12 days after heading”
t0“Rice”
Claim · model-written summary
The greatest reduction in kernel carbon occurred when high-temperature treatment began 12 days after heading.
- Taxon
- RiceOryza sativat0
- Treatment
- high temperature treatmentse0
- Outcome
- carbone0
- Direction
- greatest reductione0
- Qualifier
- 12 days after headinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The greatest reduction in kernel nitrogen (mg kernel-1), like that of carbon, occurred in high temperature treatments commencing 12 days after heading”
t0“Rice”
The same questions in other papers
heat · molecular: metabolites · Oryza sativa (rice)Results differ
29 papers in the same direction as this paper · 13 in the opposite direction
- negative
- negative
- positive
39 papers more in this group
See all 43 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.