Abstract
Wheat (Triticum aestivum L.) plants were grown to anthesis at 18/13ºC day/night and either retained at 18/13ºC or transferred to a higher temperature (24/19 or 30/25ºC) for the grain-filling period. It was confirmed that high temperature resulted in a considerable drop in kernel dry weight at maturity and there was significant cultivar variation in the degree of the response. ranging from a 30 to 60% decrease in kernel dry weight at maturity for a rise in temperature from 18/13 to 30/25ºC. An analysis of the rate and duration of kernel filling of seven cultivars showed that those cultivars most tolerant of high temperature during kernel filling (least reduction of kernel dry weight at maturity) were those where the rate of kernel filling was most enhanced by high temperature, i.e. the increased rate compensated for the reduced duration of kernel filling. The importance of the rate of kernel filling in determining varietal responses to high temperature illustrates the need to isolate the effect of temperature on processes in the kernel during the linear phase of growth.
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Claims 4
Claim · model-written summary
High temperature reduced mature wheat kernel dry weight by 30 to 60% across cultivars.
- Taxon
- Wheat
Triticum aestivumt0 - Treatment
- 30/25ºCe0
- Outcome
- kernel dry weight at maturitye0
- Direction
- decreasee0
- Value
- 30 to 60%e0
- Comparator
- 18/13e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a 30 to 60% decrease in kernel dry weight at maturity for a rise in temperature from 18/13 to 30/25ºC”
t0“Wheat”
Claim · model-written summary
Cultivars differed significantly in the magnitude of kernel dry-weight response to high temperature.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- cultivar variation in the degree of the responsee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant cultivar variation in the degree of the response”
t0“Wheat”
Claim · model-written summary
The most heat-tolerant cultivars had the greatest enhancement of kernel-filling rate under high temperature.
- Taxon
- WheatTriticum aestivumt0
- Material
- cultivars most tolerant of high temperaturee0
- Treatment
- high temperaturee0
- Outcome
- rate of kernel fillinge0
- Direction
- most enhancede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“those cultivars most tolerant of high temperature during kernel filling (least reduction of kernel dry weight at maturity) were those where the rate of kernel filling was most enhanced by high temperature”
t0“Wheat”
Claim · model-written summary
High temperature shortened kernel-filling duration.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- high temperaturee1
- Outcome
- duration of kernel fillinge0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the increased rate compensated for the reduced duration of kernel filling”
t0“Wheat”
e1“those cultivars most tolerant of high temperature during kernel filling (least reduction of kernel dry weight at maturity) were those where the rate of kernel filling was most enhanced by high temperature”
The same questions in other papers
heat · yield · Triticum aestivum (wheat)Positive and negative results
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