Abstract
Rice (Oryza sativa L.) research has rarely focused on the response to low-nitrogen stress in different subtypes previously and lacked a low-nitrogen tolerance evaluation system. Here, we investigated the physiological characteristics under moderate and low-nitrogen stress conditions in two japonica cultivars (NG46 and NG9108) and two indica cultivars (LYP9 and 9311). Using subordinate function analysis and principal component analysis, the low-nitrogen tolerance of four rice varieties was comprehensively evaluated; stomatal conductance, total carotenoid content, and nitrate reductase NR activity were taken as the low-nitrogen tolerance evaluation system. Among the four rice cultivars, NG46 and LYP9 had significant advantages in photosynthetic gas-exchange capacity, optimizing the balance between light-harvesting capacity, the ratio of reaction center inactivation, the magnitude of decrease in heat dissipation, and nitrogen-metabolism enzyme activities. The results investigated the physiological mechanisms of rice adaptation to low-nitrogen stress and offered a reliable method for assessing low-nitrogen tolerance in rice.
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Claims 5
Claim · model-written summary
Stomatal conductance, total carotenoid content, and nitrate reductase NR activity were selected as a rice low-nitrogen tolerance evaluation system.
- Taxon
- rice
Oryza sativat0 - Treatment
- low-nitrogene0
- Outcome
- low-nitrogen tolerance evaluation systeme0
Not reportedValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“stomatal conductance, total carotenoid content, and nitrate reductase NR activity were taken as the low-nitrogen tolerance evaluation system”
t0“rice”
Claim · model-written summary
NG46 had significant advantages in photosynthetic gas-exchange capacity among four rice cultivars.
- Taxon
- riceOryza sativat0
- Material
- NG46e0
- Outcome
- photosynthetic gas-exchange capacitye0
- Direction
- advantagese0
- Comparator
- four rice cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among the four rice cultivars, NG46 and LYP9 had significant advantages in photosynthetic gas-exchange capacity”
t0“rice”
Claim · model-written summary
LYP9 had significant advantages in photosynthetic gas-exchange capacity among four rice cultivars.
- Taxon
- riceOryza sativat0
- Material
- LYP9e0
- Outcome
- photosynthetic gas-exchange capacitye0
- Direction
- advantagese0
- Comparator
- four rice cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among the four rice cultivars, NG46 and LYP9 had significant advantages in photosynthetic gas-exchange capacity”
t0“rice”
Claim · model-written summary
NG46 had significant advantages in the reported light-harvesting, reaction-center, heat-dissipation and nitrogen-metabolism traits.
- Taxon
- riceOryza sativat0
- Material
- NG46e0
- Outcome
- light-harvesting capacity, the ratio of reaction center inactivation, the magnitude of decrease in heat dissipation, and nitrogen-metabolism enzyme activitiese0
- Direction
- advantagese0
- Comparator
- four rice cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among the four rice cultivars, NG46 and LYP9 had significant advantages in photosynthetic gas-exchange capacity, optimizing the balance between light-harvesting capacity, the ratio of reaction center inactivation, the magnitude of decrease in heat dissipation, and nitrogen-metabolism enzyme activities”
t0“rice”
Claim · model-written summary
LYP9 had significant advantages in the reported light-harvesting, reaction-center, heat-dissipation and nitrogen-metabolism traits.
- Taxon
- riceOryza sativat0
- Material
- LYP9e0
- Outcome
- light-harvesting capacity, the ratio of reaction center inactivation, the magnitude of decrease in heat dissipation, and nitrogen-metabolism enzyme activitiese0
- Direction
- advantagese0
- Comparator
- four rice cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among the four rice cultivars, NG46 and LYP9 had significant advantages in photosynthetic gas-exchange capacity, optimizing the balance between light-harvesting capacity, the ratio of reaction center inactivation, the magnitude of decrease in heat dissipation, and nitrogen-metabolism enzyme activities”
t0“rice”