Abstract
High temperature is one of the key limiting factors leading to serious yield reduction in maize production.The effect of high temperature treatments during flowering(0-8 d before silking and 0-8 d after silking)on yield and physiological response was investigated using heat-tolerant maize genotype Xundan 20 and heat-sensitive maize genotype Zhuyu 309.The results showed that high temperature treatment significantly reduced pollen fertility rate in heat-sensitive genotype,but the effect was similar to that of control in heat-tolerant genotype.The heat-sensitive genotype had a significant reduction in grain yield with a longer reduction rate under the treatment after flowering than before flowering,which was less affected for heat-tolerant genotype.The heat-stress treatment significantly increased the activities of enzymes for the leaves for the heat-tolerant genotype,while decreased the activities of enzymes involved in antioxidant system in heat-sensitive genotype.High temperature reduced photosynthetic rate in ear leaves and ATPase activity in kernels for both the heat-sensitive and heat-tolerant genotypes,but the decrease was not significant for the heat-tolerant genotype.High temperature increased malondialdehyde content in ear leaves and reduced root activity for heat-sensitive genotype.However,root activity of heat-tolerant genotypes increased significantly under high temperature.These results suggested that higher root activity,higher ATPase activity in kernels,and higher photosynthetic rate and activities of antioxidant enzymes in leaves would be important physiological traits leading to a higher grain yield for a heat-tolerant maize genotype.
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Claims 12
Claim · model-written summary
High temperature treatment significantly reduced pollen fertility rate in the heat-sensitive maize genotype.
- Material
- heat-sensitive genotypee0
- Treatment
- high temperature treatmente0
- Outcome
- pollen fertility ratee0
- Direction
- reducede0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Maize”
e0“high temperature treatment significantly reduced pollen fertility rate in heat-sensitive genotype”
Claim · model-written summary
High temperature treatment did not change pollen fertility rate in the heat-tolerant maize genotype relative to the control.
- Material
- heat-tolerant genotypee0
- Treatment
- high temperature treatmente0
- Outcome
- pollen fertility ratee0
- Direction
- similare0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Maize”
e0“high temperature treatment significantly reduced pollen fertility rate in heat-sensitive genotype,but the effect was similar to that of control in heat-tolerant genotype”
Claim · model-written summary
The heat-sensitive genotype had a significant grain yield reduction under high temperature during flowering, larger when treated after than before flowering.
- Material
- heat-sensitive genotypee0
- Treatment
- high temperature treatments during flowering(0-8 d before silking and 0-8 d after silking)e1
- Outcome
- grain yielde0
- Direction
- reductione0
- Qualifier
- longer reduction rate under the treatment after flowering than before floweringe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Maize”
e0“The heat-sensitive genotype had a significant reduction in grain yield with a longer reduction rate under the treatment after flowering than before flowering”
e1“high temperature treatments during flowering(0-8 d before silking and 0-8 d after silking)”
Claim · model-written summary
Grain yield of the heat-tolerant genotype was less affected by high temperature during flowering.
- Material
- heat-tolerant genotypee0
- Treatment
- high temperature treatments during flowering(0-8 d before silking and 0-8 d after silking)e1
- Outcome
- grain yielde0
- Direction
- less affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Maize”
e0“The heat-sensitive genotype had a significant reduction in grain yield with a longer reduction rate under the treatment after flowering than before flowering,which was less affected for heat-tolerant genotype”
e1“high temperature treatments during flowering(0-8 d before silking and 0-8 d after silking)”
Claim · model-written summary
The heat-stress treatment significantly increased enzyme activities in leaves of the heat-tolerant genotype.
- Material
- heat-tolerant genotypee0
- Organ / stage
- leavese0
- Treatment
- The heat-stress treatmente0
- Outcome
- activities of enzymese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Maize”
e0“The heat-stress treatment significantly increased the activities of enzymes for the leaves for the heat-tolerant genotype”
Claim · model-written summary
The heat-stress treatment decreased activities of antioxidant-system enzymes in the heat-sensitive genotype.
- Material
- heat-sensitive genotypee0
- Treatment
- The heat-stress treatmente0
- Outcome
- activities of enzymes involved in antioxidant systeme0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Maize”
e0“The heat-stress treatment significantly increased the activities of enzymes for the leaves for the heat-tolerant genotype,while decreased the activities of enzymes involved in antioxidant system in heat-sensitive genotype”
Claim · model-written summary
High temperature reduced photosynthetic rate in ear leaves and ATPase activity in kernels in both heat-sensitive and heat-tolerant genotypes.
- Material
- heat-sensitive and heat-tolerant genotypese0
- Treatment
- High temperaturee0
- Outcome
- photosynthetic rate in ear leaves and ATPase activity in kernelse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Maize”
e0“High temperature reduced photosynthetic rate in ear leaves and ATPase activity in kernels for both the heat-sensitive and heat-tolerant genotypes”
Claim · model-written summary
The decrease in photosynthetic rate and kernel ATPase activity under high temperature was not significant in the heat-tolerant genotype.
- Material
- heat-tolerant genotypee0
- Treatment
- High temperaturee0
- Outcome
- photosynthetic rate in ear leaves and ATPase activity in kernelse0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Maize”
e0“High temperature reduced photosynthetic rate in ear leaves and ATPase activity in kernels for both the heat-sensitive and heat-tolerant genotypes,but the decrease was not significant for the heat-tolerant genotype”
Claim · model-written summary
High temperature increased malondialdehyde content in ear leaves of the heat-sensitive genotype.
- Material
- heat-sensitive genotypee0
- Organ / stage
- ear leavese0
- Treatment
- High temperaturee0
- Outcome
- malondialdehyde contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Maize”
e0“High temperature increased malondialdehyde content in ear leaves and reduced root activity for heat-sensitive genotype”
Claim · model-written summary
High temperature reduced root activity in the heat-sensitive genotype.
- Material
- heat-sensitive genotypee0
- Treatment
- High temperaturee0
- Outcome
- root activitye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Maize”
e0“High temperature increased malondialdehyde content in ear leaves and reduced root activity for heat-sensitive genotype”
Claim · model-written summary
Root activity of heat-tolerant genotypes increased significantly under high temperature.
- Material
- heat-tolerant genotypese0
- Treatment
- high temperaturee0
- Outcome
- root activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Maize”
e0“root activity of heat-tolerant genotypes increased significantly under high temperature”
Claim · model-written summary
The authors suggest higher root activity, kernel ATPase activity, photosynthetic rate and antioxidant enzyme activities are important physiological traits for higher grain yield in heat-tolerant maize.
- Material
- heat-tolerant maize genotypee0
- Outcome
- higher grain yielde0
- Qualifier
- higher root activity,higher ATPase activity in kernels,and higher photosynthetic rate and activities of antioxidant enzymes in leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher root activity,higher ATPase activity in kernels,and higher photosynthetic rate and activities of antioxidant enzymes in leaves would be important physiological traits leading to a higher grain yield for a heat-tolerant maize genotype”
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