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Effect of Elevated CO2 and Temperature on Growth, Yield and Physiological Responses of Major Rice Cultivars by Region in South Korea KCI 등재
- 언어ENG
- URLhttps://db.koreascholar.com/Article/Detail/419424
pp.341-351
The physiological characteristics, growth, and yield of each regional rice variety (‘Odaebyeo’, ‘Saechucheong’, ‘Ilmibyeo’) were investigated depending on the impact of changes in temperature and CO2 concentration. Experiments were conducted with a control group, which reflected atmospheric CO2 concentration and temperature, and treatment groups, in which the CO2 concentration and temperature were increased by 250 ppm and 2.0℃ from those in the control group. The results showed that the increase in CO2 concentration and temperature reduced the growth and yield of the rice ‘Odaebyeo’, but did not substantially change the productivity of the ‘Saechucheong’ and ‘Ilmibyeo’. The increase in CO2 concentration and temperature increased stomatal conductance and rate of transpiration of the ‘Odaebyeo’ variety, thereby decreasing its water use efficiency (WUE). In contrast, the increase in CO2 concentration and temperature increased the photosynthetic rate and WUE of the ‘Saechucheong’ and ‘Ilmibyeo’ varieties. The gradual change in climate is considered to directly affect growth and development of rice and diversely affect the productivity of each variety. Therefore, it is necessary to implement technological development, select regionally optimal rice varieties, develop new rice varieties, as well as conduct long-term monitoring of each rice variety for climate adaptation to counter global warming.
INTRODUCTION
MATERIALS AND METHODS
1. Plant cultivars
2. Experimental design
3. Cultivation and harvesting
4. Growth and yield determination
5. Gas-exchanged measurements
6. Leaf C : N ratio, nitrogen content, andcarbon content
7. Statistical analysis
RESULTS AND DISCUSSION
1. Growth and yield
2. Photosynthetic responses
CONCLUSION
REFERENCES
