Abstract
L.) are obviously lower than those of superior spikelets, especially under abiotic stress. However, different responses to heat stress are seemed to show between the superior and inferior spikelet, and this response is scarcely documented that the intrinsic factors remain elusive. In order to reveal the mechanism underlying, two rice plants with different heat tolerance were subjected to heat stress of 40°C at anthesis. The results indicated that a greater decrease in fertility and kernel weight was observed in superior spikelets compared to inferior spikelets. This decrease was primarily ascribed to their different organ temperatures, in which the temperature of the superior spikelets was significantly higher than that of inferior spikelets. We inferred the differences in canopy temperature, light intensity and panicle types, were the primary reasons for the temperature difference between superior and inferior spikelets. Under heat stress, the fertility and kernel weight of superior and inferior spikelets decreased as the panicle numbers per plant were reduced, which was accompanied by significantly increasing the canopy temperatures. Thus, it was suggested that the rice plant with characteristic features of an upright growth habit and loose panicles might be more susceptible to heat stress resulting from their higher canopy and spikelets temperatures.
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Claims 9
Claim · model-written summary
Heat stress caused a greater fertility decrease in superior than inferior spikelets.
- Taxon
- Rice
Oryza sativat0 - Organ / stage
- superior spikeletse0
- Treatment
- heat stress of 40°C at anthesise1
- Outcome
- fertilitye0
- Direction
- greater decreasee0
- Comparator
- inferior spikeletse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“a greater decrease in fertility and kernel weight was observed in superior spikelets compared to inferior spikelets”
e1“heat stress of 40°C at anthesis”
Claim · model-written summary
Heat stress caused a greater kernel weight decrease in superior than inferior spikelets.
- Taxon
- RiceOryza sativat0
- Organ / stage
- superior spikeletse0
- Treatment
- heat stress of 40°C at anthesise1
- Outcome
- kernel weighte0
- Direction
- greater decreasee0
- Comparator
- inferior spikeletse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“a greater decrease in fertility and kernel weight was observed in superior spikelets compared to inferior spikelets”
e1“heat stress of 40°C at anthesis”
Claim · model-written summary
Superior spikelets had significantly higher temperature than inferior spikelets.
- Taxon
- RiceOryza sativat0
- Organ / stage
- superior spikeletse0
- Outcome
- temperaturee0
- Direction
- highere0
- Comparator
- inferior spikeletse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“the temperature of the superior spikelets was significantly higher than that of inferior spikelets”
Claim · model-written summary
Different organ temperatures were primarily responsible for the differential spikelet response.
- Taxon
- RiceOryza sativat0
- Outcome
- This decreasee0
- Qualifier
- different organ temperaturese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“This decrease was primarily ascribed to their different organ temperatures”
Claim · model-written summary
Canopy temperature, light intensity and panicle type were inferred to explain superior and inferior spikelet temperature differences.
- Taxon
- RiceOryza sativat0
- Outcome
- temperature difference between superior and inferior spikeletse0
- Qualifier
- differences in canopy temperature, light intensity and panicle typese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“We inferred the differences in canopy temperature, light intensity and panicle types, were the primary reasons for the temperature difference between superior and inferior spikelets”
Claim · model-written summary
Under heat stress, fewer panicles per plant accompanied decreased spikelet fertility.
- Taxon
- RiceOryza sativat0
- Organ / stage
- superior and inferior spikeletse0
- Treatment
- heat stresse0
- Outcome
- fertilitye0
- Direction
- decreasede0
- Qualifier
- panicle numbers per plant were reducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“Under heat stress, the fertility and kernel weight of superior and inferior spikelets decreased as the panicle numbers per plant were reduced”
Claim · model-written summary
Under heat stress, fewer panicles per plant accompanied decreased kernel weight.
- Taxon
- RiceOryza sativat0
- Organ / stage
- superior and inferior spikeletse0
- Treatment
- heat stresse0
- Outcome
- kernel weighte0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“Under heat stress, the fertility and kernel weight of superior and inferior spikelets decreased as the panicle numbers per plant were reduced”
Claim · model-written summary
Reduced panicle numbers coincided with increased canopy temperatures.
- Taxon
- RiceOryza sativat0
- Organ / stage
- paniclee0
- Outcome
- canopy temperaturese0
- Direction
- increasinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“the panicle numbers per plant were reduced, which was accompanied by significantly increasing the canopy temperatures”
Claim · model-written summary
The authors suggest upright plants with loose panicles may be more susceptible to heat stress because of higher canopy and spikelet temperatures.
- Taxon
- RiceOryza sativat0
- Organ / stage
- loose paniclese0
- Outcome
- more susceptible to heat stresse0
- Qualifier
- higher canopy and spikelets temperaturese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“the rice plant with characteristic features of an upright growth habit and loose panicles might be more susceptible to heat stress resulting from their higher canopy and spikelets temperatures”
The same questions in other papers
heat · yield · Oryza sativa (rice)Positive and negative results
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