Abstract
The effects of two levels of temperature and of water supply on grain development of wheat (cv. Warigal) were studied by imposing treatments during the early or late period of cell division. High temperature (28°C day/20°C night) accelerated development of the grain. Dry matter accumulation and cell division proceeded at a higher rate but had a shorter duration in the high temperature treatments. Maximum cell number, final cell size and the number of large starch granules per cell were not significantly reduced by high temperature. Drought and drought × high temperature reduced the storage capacity of the grain, with a decrease in number of cells and starch granules in the endosperm. Cell size was also reduced when treatments were imposed late during cell division. Duration of dry matter accumulation and cell division was reduced in the drought and drought × high temperature treatments. The combined effects of drought and high temperature were much more severe than those of each separate treatment. The amount of sucrose per cell was similar in all treatments. It appears unlikely that the supply of sucrose to the endosperm cells is the main limiting factor of dry matter accumulation in both drought and high temperature treatments.
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Claims 11
Claim · model-written summary
High temperature accelerated wheat grain development.
- Taxon
- Wheat
Triticum aestivumt0 - Treatment
- High temperature (28°C day/20°C night)e0
- Outcome
- development of the graine0
- Direction
- acceleratede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“High temperature (28°C day/20°C night) accelerated development of the grain.”
Claim · model-written summary
High temperature raised the rate of grain dry matter accumulation and cell division.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- high temperature treatmentse0
- Outcome
- Dry matter accumulation and cell divisione0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“Dry matter accumulation and cell division proceeded at a higher rate but had a shorter duration in the high temperature treatments.”
Claim · model-written summary
High temperature shortened the duration of dry matter accumulation and cell division.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- high temperature treatmentse0
- Outcome
- Dry matter accumulation and cell divisione0
- Direction
- shortere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“Dry matter accumulation and cell division proceeded at a higher rate but had a shorter duration in the high temperature treatments.”
Claim · model-written summary
High temperature did not significantly reduce maximum cell number, final cell size, or large starch granules per cell.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- high temperaturee0
- Outcome
- Maximum cell number, final cell size and the number of large starch granules per celle0
- Direction
- not significantly reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“Maximum cell number, final cell size and the number of large starch granules per cell were not significantly reduced by high temperature.”
Claim · model-written summary
Drought and combined drought and high temperature reduced grain storage capacity.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- Drought and drought × high temperaturee0
- Outcome
- storage capacity of the graine0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“Drought and drought × high temperature reduced the storage capacity of the grain, with a decrease in number of cells and starch granules in the endosperm.”
Claim · model-written summary
Drought and combined drought and high temperature decreased endosperm cell and starch granule numbers.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- Drought and drought × high temperaturee0
- Outcome
- number of cells and starch granules in the endosperme0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“Drought and drought × high temperature reduced the storage capacity of the grain, with a decrease in number of cells and starch granules in the endosperm.”
Claim · model-written summary
Late cell division treatments reduced grain cell size.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- treatmentse0
- Outcome
- Cell sizee0
- Direction
- reducede0
- Qualifier
- late during cell divisione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“Cell size was also reduced when treatments were imposed late during cell division.”
Claim · model-written summary
Drought and combined drought and high temperature shortened dry matter accumulation and cell division.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- drought and drought × high temperature treatmentse0
- Outcome
- Duration of dry matter accumulation and cell divisione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“Duration of dry matter accumulation and cell division was reduced in the drought and drought × high temperature treatments.”
Claim · model-written summary
Combined drought and high temperature had more severe effects than either treatment alone.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- drought and high temperaturee0
- Outcome
- combined effectse0
- Direction
- much more severee0
- Comparator
- each separate treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“The combined effects of drought and high temperature were much more severe than those of each separate treatment.”
Claim · model-written summary
Sucrose per cell was similar across treatments.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- amount of sucrose per celle0
- Direction
- similare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“The amount of sucrose per cell was similar in all treatments.”
Claim · model-written summary
The authors considered sucrose supply unlikely to be the chief limit on dry matter accumulation under drought or heat.
- Taxon
- WheatTriticum aestivumt0
- Compound
- sucrosee0
- Outcome
- dry matter accumulatione0
- Qualifier
- appears unlikelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“It appears unlikely that the supply of sucrose to the endosperm cells is the main limiting factor of dry matter accumulation in both drought and high temperature treatments.”
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See all 10 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.