Abstract
Abstract High temperature and drought stress are projected to reduce crop yields and threaten food security. While effects of heat and drought on crop growth and yield have been studied separately, little is known about the combined effect of these stressors. We studied detrimental effects of high temperature, drought stress and combined heat and drought stress around anthesis on yield and its components for three wheat cultivars originating from Germany and Iran. We found that effects of combined heat and drought on the studied physiological and yield traits were considerably stronger than those of the individual stress factors alone, but the magnitude of the effects varied for specific growth‐ and yield‐related traits. Single grain weight was reduced under drought stress by 13%–27% and under combined heat and drought stress by 43%–83% but not by heat stress alone. Heat stress significantly decreased grain number by 14%–28%, grain yield by 16%–25% and straw yield by 15%–25%. Cultivar responses were similar for heat but different for drought and combined heat and drought treatments. We conclude that heat stress as imposed in this study is less detrimental than the effects of those other studied stresses on growth and yield traits.
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Claims 9
Claim · model-written summary
Combined heat and drought had stronger effects on physiological and yield traits than individual stresses.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- combined heat and droughte0
- Outcome
- physiological and yield traitse0
- Direction
- considerably strongere0
- Comparator
- individual stress factors alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effects of combined heat and drought on the studied physiological and yield traits were considerably stronger than those of the individual stress factors alone”
t0“wheat”
Claim · model-written summary
Drought reduced single grain weight by 13%–27%.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- drought stresse0
- Outcome
- Single grain weighte0
- Direction
- reducede0
- Value
- 13%–27%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Single grain weight was reduced under drought stress by 13%–27%”
t0“wheat”
Claim · model-written summary
Combined heat and drought reduced single grain weight by 43%–83%.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- combined heat and drought stresse0
- Outcome
- Single grain weighte0
- Direction
- reducede0
- Value
- 43%–83%e0
- Comparator
- heat stress alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Single grain weight was reduced under drought stress by 13%–27% and under combined heat and drought stress by 43%–83% but not by heat stress alone”
t0“wheat”
Claim · model-written summary
Heat stress alone did not reduce single grain weight.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- heat stress alonee0
- Outcome
- Single grain weighte0
- Direction
- note0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Single grain weight was reduced under drought stress by 13%–27% and under combined heat and drought stress by 43%–83% but not by heat stress alone”
t0“wheat”
Claim · model-written summary
Heat reduced grain number by 14%–28%.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Heat stresse0
- Outcome
- grain numbere0
- Direction
- decreasede0
- Value
- 14%–28%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Heat stress significantly decreased grain number by 14%–28%”
t0“wheat”
Claim · model-written summary
Heat reduced grain yield by 16%–25%.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Heat stresse0
- Outcome
- grain yielde0
- Direction
- decreasede0
- Value
- 16%–25%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Heat stress significantly decreased grain number by 14%–28%, grain yield by 16%–25% and straw yield by 15%–25%”
t0“wheat”
Claim · model-written summary
Heat reduced straw yield by 15%–25%.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Heat stresse0
- Outcome
- straw yielde0
- Direction
- decreasede0
- Value
- 15%–25%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Heat stress significantly decreased grain number by 14%–28%, grain yield by 16%–25% and straw yield by 15%–25%”
t0“wheat”
Claim · model-written summary
Cultivar responses were similar for heat stress.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- Cultivar responses were similar for heate0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cultivar responses were similar for heat but different for drought and combined heat and drought treatments”
t0“wheat”
Claim · model-written summary
Cultivar responses differed for drought and combined stress.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- different for drought and combined heat and drought treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“different for drought and combined heat and drought treatments”
t0“wheat”
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See all 632 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.