Abstract
The effect of high temperatures (above 25°C) on starch concentration and the morphology of starch granules in the grains of wheat (Triticum aestivum L.) were studied. Wheat plants of cultivars Yangmai 9 (weak-gluten) and Yangmai 12 (medium-gluten) were treated with high temperatures for 3 days at different times after anthesis. The results showed that the starch concentration of grains given a heat-shock treatment above 30°C were lower than those developing at normal temperature in both cultivars. High temperature lowered starch concentration due to the decrease of amylopectin. Under the same temperature, the effect of heat shock from 6 to 8 days after anthesis (DAA) was the greatest, whereas from 36 to 38 DAA the effect was the least. The effects of high temperatures after anthesis on starch-pasting properties were similar to those on starch concentration, especially after 35-40°C treatments. The size, shape and structure of starch granules in wheat grains (determined by electron microscopy) after heat shock were visibly different from the control. When given heat shock during development, the starch granules in mature wheat grains were ellipsoid in shape and bound loosely with a protein sheath in Yangmai 9, while they were damaged and compressed with fissures in Yangmai 12, indicating the differences in resistance to high temperature between cultivars. Ratios of large (type-A) and small (type-B) starch granules significantly decreased under heat shock, which limited the potential sink size for dry matter deposition in the grain.
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Claims 11
Claim · model-written summary
Heat-shock treatment above 30°C lowered starch concentration in wheat grains compared with normal temperature in both cultivars.
- Taxon
- wheat
Triticum aestivume0 - Organ / stage
- grainse1
- Treatment
- heat-shock treatment above 30°Ce1
- Outcome
- starch concentratione1
- Direction
- lowere1
- Comparator
- normal temperaturee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the grains of wheat (Triticum aestivum L.) were studied”
e1“the starch concentration of grains given a heat-shock treatment above 30°C were lower than those developing at normal temperature in both cultivars”
Claim · model-written summary
High temperature lowered starch concentration in wheat by decreasing amylopectin.
- Taxon
- wheatTriticum aestivume0
- Compound
- amylopectine2
- Outcome
- starch concentratione2
- Direction
- lowerede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the grains of wheat (Triticum aestivum L.) were studied”
e2“High temperature lowered starch concentration due to the decrease of amylopectin”
Claim · model-written summary
Heat shock from 6 to 8 days after anthesis had the greatest effect on starch concentration.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- after anthesise3
- Treatment
- heat shock from 6 to 8 days after anthesis (DAA)e3
- Outcome
- the effect of heat shocke3
- Direction
- greateste3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the grains of wheat (Triticum aestivum L.) were studied”
e3“Under the same temperature, the effect of heat shock from 6 to 8 days after anthesis (DAA) was the greatest”
Claim · model-written summary
Heat shock from 36 to 38 DAA had the least effect on starch concentration.
- Taxon
- wheatTriticum aestivume0
- Treatment
- from 36 to 38 DAAe4
- Outcome
- the effecte4
- Direction
- leaste4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the grains of wheat (Triticum aestivum L.) were studied”
e4“whereas from 36 to 38 DAA the effect was the least”
Claim · model-written summary
High temperatures after anthesis changed starch-pasting properties in a way similar to starch concentration, especially after 35-40°C treatments.
- Taxon
- wheatTriticum aestivume0
- Treatment
- high temperatures after anthesise5
- Outcome
- starch-pasting propertiese5
- Qualifier
- similar to those on starch concentratione5
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the grains of wheat (Triticum aestivum L.) were studied”
e5“The effects of high temperatures after anthesis on starch-pasting properties were similar to those on starch concentration”
e6“especially after 35-40°C treatments”
Claim · model-written summary
Heat shock visibly changed the size, shape and structure of starch granules in wheat grains compared with the control.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- wheat grainse6
- Treatment
- heat shocke6
- Outcome
- size, shape and structure of starch granulese6
- Direction
- visibly differente6
- Comparator
- controle6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the grains of wheat (Triticum aestivum L.) were studied”
e6“The size, shape and structure of starch granules in wheat grains (determined by electron microscopy) after heat shock were visibly different from the control”
Claim · model-written summary
In Yangmai 9, starch granules in heat-shocked mature grains were ellipsoid and loosely bound to a protein sheath.
- Taxon
- wheatTriticum aestivume0
- Material
- Yangmai 9e7
- Organ / stage
- mature wheat grainse7
- Treatment
- heat shocke7
- Outcome
- starch granulese7
- Qualifier
- ellipsoid in shape and bound loosely with a protein sheathe7
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the grains of wheat (Triticum aestivum L.) were studied”
e7“When given heat shock during development, the starch granules in mature wheat grains were ellipsoid in shape and bound loosely with a protein sheath in Yangmai 9”
Claim · model-written summary
In Yangmai 12, starch granules in heat-shocked mature grains were damaged and compressed with fissures.
- Taxon
- wheatTriticum aestivume0
- Material
- Yangmai 12e2
- Organ / stage
- mature wheat grainse7
- Treatment
- heat shocke7
- Outcome
- starch granulese7
- Qualifier
- damaged and compressed with fissurese2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the grains of wheat (Triticum aestivum L.) were studied”
e7“When given heat shock during development, the starch granules in mature wheat grains were ellipsoid in shape and bound loosely with a protein sheath in Yangmai 9”
e2“while they were damaged and compressed with fissures in Yangmai 12, indicating the differences in resistance to high temperature between cultivars”
Claim · model-written summary
Yangmai 9 and Yangmai 12 differ in resistance to high temperature.
- Taxon
- wheatTriticum aestivume0
- Outcome
- the differences in resistance to high temperature between cultivarse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the grains of wheat (Triticum aestivum L.) were studied”
e1“while they were damaged and compressed with fissures in Yangmai 12, indicating the differences in resistance to high temperature between cultivars”
Claim · model-written summary
Heat shock significantly decreased the ratios of large and small starch granules in wheat grains.
- Taxon
- wheatTriticum aestivume0
- Treatment
- heat shocke1
- Outcome
- Ratios of large (type-A) and small (type-B) starch granulese1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the grains of wheat (Triticum aestivum L.) were studied”
e1“Ratios of large (type-A) and small (type-B) starch granules significantly decreased under heat shock, which limited the potential sink size for dry matter deposition in the grain”
Claim · model-written summary
The decreased starch granule ratios limited the potential sink size for dry matter deposition in wheat grains.
- Taxon
- wheatTriticum aestivume0
- Outcome
- potential sink size for dry matter depositione1
- Qualifier
- Ratios of large (type-A) and small (type-B) starch granulese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the grains of wheat (Triticum aestivum L.) were studied”
e1“Ratios of large (type-A) and small (type-B) starch granules significantly decreased under heat shock, which limited the potential sink size for dry matter deposition in the grain”
The same questions in other papers
heat · quality: sugar starch · Triticum aestivum (wheat)Results differ
34 papers in the same direction as this paper · 7 in the opposite direction
- positive
- negative
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See all 42 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.