Abstract
The purpose of this study was to identify the physiological mechanism underlying the effects of high temperature and waterlogging on summer maize. The stem development and yield of the maize hybrid Denghai 605 in response to high-temperature stress, waterlogging stress, and their combination applied for six days at the third-leaf, sixth-leaf, and tasseling stages were recorded. The combined stresses reduced lignin biosynthetic enzyme activity and lignin accumulation, leading to abnormal stem development. Reduction of the area and number of vascular bundles in stems led to reduced dry matter accumulation and allocation. Decreased grain dry weight at all three stages reduced grain yield relative to a control. In summary, high temperature, waterlogging, and their combined stress impaired stem development and grain yield of summer maize. The combined stresses were more damaging than either stress alone.
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Claims 10
Claim · model-written summary
Combined heat and waterlogging reduced lignin biosynthetic enzyme activity.
- Treatment
- high temperature and waterlogginge1
- Outcome
- lignin biosynthetic enzyme activitye0
- Direction
- reducede0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The combined stresses reduced lignin biosynthetic enzyme activity and lignin accumulation”
e1“high temperature and waterlogging on summer maize”
Claim · model-written summary
Combined heat and waterlogging reduced lignin accumulation.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The combined stresses reduced lignin biosynthetic enzyme activity and lignin accumulation”
e1“high temperature and waterlogging on summer maize”
Claim · model-written summary
Combined stress led to abnormal maize stem development.
- Treatment
- high temperature and waterlogginge1
- Outcome
- abnormal stem developmente0
- Qualifier
- reduced lignin biosynthetic enzyme activity and lignin accumulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The combined stresses reduced lignin biosynthetic enzyme activity and lignin accumulation, leading to abnormal stem development.”
e1“high temperature and waterlogging on summer maize”
Claim · model-written summary
Vascular bundle area in maize stems was reduced.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reduction of the area and number of vascular bundles in stems”
e1“high temperature and waterlogging on summer maize”
Claim · model-written summary
Vascular bundle number in maize stems was reduced.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reduction of the area and number of vascular bundles in stems”
e1“high temperature and waterlogging on summer maize”
Claim · model-written summary
Reduced vascular bundles led to reduced dry matter accumulation and allocation.
- Outcome
- dry matter accumulation and allocatione0
- Direction
- reducede0
- Qualifier
- Reduction of the area and number of vascular bundles in stemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reduction of the area and number of vascular bundles in stems led to reduced dry matter accumulation and allocation.”
e1“high temperature and waterlogging on summer maize”
Claim · model-written summary
Decreased grain dry weight at all three stages reduced grain yield relative to a control.
- Outcome
- grain yielde0
- Direction
- reducede0
- Qualifier
- Decreased grain dry weight at all three stagese0
- Comparator
- a controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Decreased grain dry weight at all three stages reduced grain yield relative to a control.”
e1“high temperature and waterlogging on summer maize”
Claim · model-written summary
High temperature impaired maize stem development and grain yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high temperature, waterlogging, and their combined stress impaired stem development and grain yield of summer maize.”
Claim · model-written summary
Waterlogging impaired maize stem development and grain yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high temperature, waterlogging, and their combined stress impaired stem development and grain yield of summer maize.”
Claim · model-written summary
Combined heat and waterlogging impaired maize stem development and grain yield more than either stress alone.
- Treatment
- their combined stresse0
- Outcome
- stem development and grain yielde0
- Direction
- more damaginge0
- Comparator
- either stress alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high temperature, waterlogging, and their combined stress impaired stem development and grain yield of summer maize. The combined stresses were more damaging than either stress alone.”
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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.