Abstract
Abstract Background Short episodes of high temperature (HT) stress during reproductive stages of development cause significant yield losses in wheat ( Triticum aestivum L.). Two independent experiments were conducted to quantify the effects of HT during anthesis and grain filling periods on photosynthesis, leaf lipidome, and yield traits in wheat. In experiment I, wheat genotype Seri82 was exposed to optimum temperature (OT; 22/14 °C; day/night) or HT (32/22 °C) for 14 d during anthesis stage. In experiment II, the plants were exposed to OT or HT for 14 d during the grain filling stage. During the HT stress, chlorophyll index, thylakoid membrane damage, stomatal conductance, photosynthetic rate and leaf lipid composition were measured. At maturity, grain yield and its components were quantified. Results HT stress during anthesis or grain filling stage decreased photosynthetic rate (17 and 25%, respectively) and grain yield plant − 1 (29 and 44%, respectively), and increased thylakoid membrane damage (61 and 68%, respectively) compared to their respective control (OT). HT stress during anthesis or grain filling stage increased the molar percentage of less unsaturated lipid species [36:5- monogalactosyldiacylglycerol (MGDG) and digalactosyldiacylglycerol (DGDG)]. However, at grain filling stage, HT stress decreased the molar percentage of more unsaturated lipid species (36:6- MGDG and DGDG). There was a significant positive relationship between photosynthetic rate and grain yield plant − 1 , and a negative relationship between thylakoid membrane damage and photosynthetic rate. Conclusions The study suggests that maintaining thylakoid membrane stability, and seed-set per cent and individual grain weight under HT stress can improve the photosynthetic rate and grain yield, respectively.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 10
Claim · model-written summary
Heat stress during anthesis decreased photosynthetic rate by 17%.
- Taxon
- wheat
Triticum aestivumt0 - Organ / stage
- anthesise0
- Treatment
- HT stress during anthesise0
- Outcome
- photosynthetic ratee0
- Direction
- decreasede0
- Value
- 17e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“HT stress during anthesis or grain filling stage decreased photosynthetic rate (17 and 25%, respectively)”
Claim · model-written summary
Heat stress during grain filling decreased photosynthetic rate by 25%.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- grain filling stagee0
- Treatment
- HT stresse0
- Outcome
- photosynthetic ratee0
- Direction
- decreasede0
- Value
- 25%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“HT stress during anthesis or grain filling stage decreased photosynthetic rate (17 and 25%, respectively)”
Claim · model-written summary
Heat stress during anthesis decreased grain yield per plant by 29%.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- HT stress during anthesise0
- Outcome
- grain yield plant − 1e0
- Direction
- decreasede0
- Value
- 29e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“HT stress during anthesis or grain filling stage decreased photosynthetic rate (17 and 25%, respectively) and grain yield plant − 1 (29 and 44%, respectively)”
Claim · model-written summary
Heat stress during grain filling decreased grain yield per plant by 44%.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- HT stresse0
- Outcome
- grain yield plant − 1e0
- Direction
- decreasede0
- Value
- 44%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“HT stress during anthesis or grain filling stage decreased photosynthetic rate (17 and 25%, respectively) and grain yield plant − 1 (29 and 44%, respectively)”
Claim · model-written summary
Heat stress during anthesis increased thylakoid membrane damage by 61%.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- HT stress during anthesise0
- Outcome
- thylakoid membrane damagee0
- Direction
- increasede0
- Value
- 61e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“HT stress during anthesis or grain filling stage decreased photosynthetic rate (17 and 25%, respectively) and grain yield plant − 1 (29 and 44%, respectively), and increased thylakoid membrane damage (61 and 68%, respectively)”
Claim · model-written summary
Heat stress during grain filling increased thylakoid membrane damage by 68%.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- HT stresse0
- Outcome
- thylakoid membrane damagee0
- Direction
- increasede0
- Value
- 68%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“HT stress during anthesis or grain filling stage decreased photosynthetic rate (17 and 25%, respectively) and grain yield plant − 1 (29 and 44%, respectively), and increased thylakoid membrane damage (61 and 68%, respectively)”
Claim · model-written summary
Heat stress during anthesis or grain filling increased the percentage of less unsaturated lipid species.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- anthesis or grain filling stagee0
- Treatment
- HT stress during anthesis or grain filling stagee0
- Outcome
- molar percentage of less unsaturated lipid speciese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“HT stress during anthesis or grain filling stage increased the molar percentage of less unsaturated lipid species [36:5- monogalactosyldiacylglycerol (MGDG) and digalactosyldiacylglycerol (DGDG)]”
Claim · model-written summary
Heat stress during grain filling decreased the percentage of more unsaturated lipid species.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- grain filling stagee0
- Treatment
- HT stresse0
- Outcome
- molar percentage of more unsaturated lipid speciese0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“at grain filling stage, HT stress decreased the molar percentage of more unsaturated lipid species (36:6- MGDG and DGDG)”
Claim · model-written summary
Photosynthetic rate was positively related to grain yield per plant.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- grain yield plant − 1e0
- Direction
- positivee0
- Qualifier
- significante0
- Comparator
- photosynthetic ratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“significant positive relationship between photosynthetic rate and grain yield plant − 1”
Claim · model-written summary
Thylakoid membrane damage was negatively related to photosynthetic rate.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- photosynthetic ratee0
- Direction
- negativee0
- Comparator
- thylakoid membrane damagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“negative relationship between thylakoid membrane damage and photosynthetic rate”
The same questions in other papers
heat · physiology: oxidative · Triticum aestivum (wheat)Results differ
30 papers in the same direction as this paper · 12 in the opposite direction
- negative
- negative
- negative
39 papers more in this group
See all 43 papers →heat · physiology: photosynthesis · Triticum aestivum (wheat)Positive and negative results
72 papers in the same direction as this paper · 17 in the opposite direction
- positive
- negative
- negative
86 papers more in this group
See all 90 papers →heat · yield · Triticum aestivum (wheat)Positive and negative results
254 papers in the same direction as this paper · 54 in the opposite direction
- positive
- positive
- positive
305 papers more in this group
See all 309 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.