Abstract
In this study, controlled-environment conditions were used to compare the effects of moderately high and very high temperatures during grain filling on grain growth and malting quality of barley. Heat stress applied from 15 to 20 days after anthesis (DAA) reduced grain weight by about 35%, whereas longer periods (15–20 days) of moderately high temperature applied from 20 DAA to maturity reduced grain weight by about 6%. Both heat stress and moderately high temperature resulted in reduced grain weight through a reduction in the duration of grain filling. Grain composition was altered by both moderately high and very high temperatures, although the changes were larger under very high temperatures. In general, there was a decrease in starch content, resulting from the reduction in both volume and number of A- and B-type starch granules. Nitrogen concentration was significantly increased only in the 30/25°C treatments, and changes in diastatic power were only minor. There was a reduction in ß-glucan content, together with an increase in ß-glucan degradation. However, malt extract was not significantly affected by these stresses.
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Claims 11
Claim · model-written summary
Heat stress applied from 15 to 20 days after anthesis reduced barley grain weight by about 35%.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaret0 - Treatment
- Heat stress applied from 15 to 20 days after anthesis (DAA)e0
- Outcome
- grain weighte0
- Direction
- reducede0
- Value
- about 35%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“malting quality of barley”
e0“Heat stress applied from 15 to 20 days after anthesis (DAA) reduced grain weight by about 35%”
Claim · model-written summary
Moderately high temperature applied from 20 DAA to maturity for longer periods (15-20 days) reduced barley grain weight by about 6%.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- moderately high temperature applied from 20 DAA to maturitye0
- Outcome
- grain weighte0
- Direction
- reducede0
- Value
- about 6%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“malting quality of barley”
e0“longer periods (15–20 days) of moderately high temperature applied from 20 DAA to maturity reduced grain weight by about 6%”
Claim · model-written summary
Both heat stress and moderately high temperature reduced barley grain weight through a shortened duration of grain filling.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- heat stress and moderately high temperaturee0
- Outcome
- grain weighte0
- Qualifier
- reduction in the duration of grain fillinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“malting quality of barley”
e0“Both heat stress and moderately high temperature resulted in reduced grain weight through a reduction in the duration of grain filling”
Claim · model-written summary
Barley grain composition was altered by both moderately high and very high temperatures, with larger changes under very high temperatures.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- moderately high and very high temperaturese0
- Outcome
- Grain compositione0
- Direction
- alterede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“malting quality of barley”
e0“Grain composition was altered by both moderately high and very high temperatures, although the changes were larger under very high temperatures”
Claim · model-written summary
Starch content in barley grain decreased in general.
- Taxon
- barleyHordeum vulgaret0
- Outcome
- starch contente0
- Direction
- decreasee0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“malting quality of barley”
e0“there was a decrease in starch content”
Claim · model-written summary
The decrease in starch resulted from a reduction in both volume and number of A- and B-type starch granules.
- Taxon
- barleyHordeum vulgaret0
- Outcome
- volume and number of A- and B-type starch granulese0
- Direction
- reductione0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“malting quality of barley”
e0“the reduction in both volume and number of A- and B-type starch granules”
Claim · model-written summary
Nitrogen concentration in barley grain was significantly increased only in the 30/25°C treatments.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- 30/25°C treatmentse0
- Outcome
- Nitrogen concentratione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“malting quality of barley”
e0“Nitrogen concentration was significantly increased only in the 30/25°C treatments”
Claim · model-written summary
Changes in diastatic power of barley were only minor.
- Taxon
- barleyHordeum vulgaret0
- Outcome
- diastatic powere0
Not reportedTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“malting quality of barley”
e0“changes in diastatic power were only minor”
Claim · model-written summary
Barley grain beta-glucan content was reduced.
- Taxon
- barleyHordeum vulgaret0
- Outcome
- ß-glucan contente0
- Direction
- reductione0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“malting quality of barley”
e0“There was a reduction in ß-glucan content”
Claim · model-written summary
Beta-glucan degradation increased in barley grain.
- Taxon
- barleyHordeum vulgaret0
- Outcome
- ß-glucan degradatione0
- Direction
- increasee0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“malting quality of barley”
e0“an increase in ß-glucan degradation”
Claim · model-written summary
Malt extract was not significantly affected by the heat stress and moderately high temperature.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- these stressese0
- Outcome
- malt extracte0
- Direction
- not significantly affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“malting quality of barley”
e0“malt extract was not significantly affected by these stresses”
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See all 29 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.