Abstract
Abstract Post‐head‐emergence frost ( PHEF ) has a detrimental impact on grain yield of wheat, and an enhanced photosynthate supply could alleviate the negative impact. However, modulation of photosynthate availability at different growth stages may exert different effects on the plant physiology and grain yield. The objective of this study was to investigate the roles of the enhanced photosynthate supply by growing the plants at elevated [ CO 2 ] (800 ppm) during different growth stages on yield performance of wheat exposed to PHEF . The results showed that the PHEF caused a high grain yield loss in wheat, and an increase in photosynthate supply during the reproductive growth stage mitigated the negative impact, whereas that at vegetative growth stage exacerbated the negative impact of PHEF . The opposite effects exerted by the enhanced photosynthate supply at vegetative stage versus at reproductive stage on yield performance could be associated with its distinguished roles in influencing plant physiology at the two growth stages. The positive effect of the increased photosynthate supply at reproductive stage was due to an improved grain filling and regeneration of effective tillers upon recovery from frost, whereas the negative effects of the enhanced photosynthate supply at vegetative growth stage were primarily due to an accelerated early vegetative growth that increased the sensibility of the plants to PHEF .
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Claims 6
Claim · model-written summary
Post-head-emergence frost caused high grain yield loss in wheat.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- PHEFe0
- Outcome
- grain yield losse0
- Direction
- losse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the PHEF caused a high grain yield loss in wheat”
Claim · model-written summary
Increased photosynthate supply during reproductive growth mitigated frost yield loss.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- increase in photosynthate supply during the reproductive growth stagee0
- Outcome
- negative impacte0
- Direction
- mitigatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an increase in photosynthate supply during the reproductive growth stage mitigated the negative impact”
t0“wheat”
Claim · model-written summary
Increased photosynthate supply at the vegetative stage exacerbated frost yield loss.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- vegetative growth stagee0
- Outcome
- negative impact of PHEFe0
- Direction
- exacerbatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“that at vegetative growth stage exacerbated the negative impact of PHEF”
t0“wheat”
Claim · model-written summary
Improved grain filling explained the positive yield effect of reproductive-stage photosynthate supply.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- increased photosynthate supply at reproductive stagee0
- Outcome
- improved grain fillinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The positive effect of the increased photosynthate supply at reproductive stage was due to an improved grain filling”
t0“wheat”
Claim · model-written summary
Regeneration of effective tillers after frost explained the positive yield effect of reproductive-stage photosynthate supply.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- regeneration of effective tillerse0
- Qualifier
- upon recovery from froste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“regeneration of effective tillers upon recovery from frost”
t0“wheat”
Claim · model-written summary
Accelerated early vegetative growth increased frost sensitivity after enhanced vegetative-stage photosynthate supply.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- sensibility of the plants to PHEFe0
- Qualifier
- accelerated early vegetative growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an accelerated early vegetative growth that increased the sensibility of the plants to PHEF”
t0“wheat”
The same questions in other papers
cold · yield · Triticum aestivum (wheat)Results differ
45 papers in the same direction as this paper · 21 in the opposite direction
- positive
- positive
- negative
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