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| Response of rice quality to major climate change factors |
| Received:February 28, 2020 |
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| KeyWord:climate change;elevated CO2 concentration;high O3 concentration;high temperature;rice;quality |
| Author Name | Affiliation | E-mail | | WANG Yun-xia | College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225009, China | | | YANG Lian-xin | Yangzhou University/Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou 225009, China | lxyang@yzu.edu.cn |
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| Abstract: |
| The climate change caused by human activities significantly changes the growth environment of crops, and causes a series of effects in plant physiological and metabolic processes, which affects the physical and chemical properties of crops, including rice plants; Ultimately, it changes rice grain quality and feeding value of rice straw for animals. This review summarized the latest progress of the effects of high concentration of CO2, O3 and high temperature on the grain quality of rice and feeding value of rice straw, which derived from experimental studies using closed chambers, open-top chambers and open-air field gas enrichment systems. In most cases, grains harvested from rice plants grown under elevated CO2 concentration had increased grain chalkiness, poor processing suitability, lower concentrations of proteins, amino acids and mineral elements, but a possibility of better cooking/eating quality. Rice grains obtained from plants grown in high O3 concentration environment showed a tendency of quality deterioration in grain appearance, processing suitability and palatability of cooked rice, as well as the digestibility of rice straw for animals. High temperature decreased the head rice percentage, increased the grain chalkiness and protein concentration, lowered the palatability of cooked rice. It had been observed that the effects of single climate factor on rice quality was influenced by other environment factors and cultivation measures, but the research of multiple factors interaction has just begun, and there were still a lot of knowledge gaps. In the future, we should incorporate a variety of simulation methods, and strengthen the studies on the comprehensive effects of multiple factors interaction on rice quality and its regulation mechanism. |
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