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A possible scenario for the end of the 21st century is that the atmospheric CO2 concentration will be in the range of 510 - 760 μl·L-I and that the mean global temperature will be 1.5°C - 4.5°C higher than present day. One of the pre-eminent manifestations of climate change is the increase in atmospheric CO2 concentration. Both CO2 and temperature are the key variables of global climate and may cause significant changes in crop productivity. An experiment was conducted inside open top chamber (OTCs) in kharif season 2014 to evaluate the effects of CO2 enrichment and temperature rise with condition OTC1 (ambient condition), OTC2 (25% higher CO2 than ambient), OTC3 (25% higher CO2 + 2°C 】ambient temperature) and OTC4 (2°C 】ambient temperature) on physiological traits and yield of rice genotypes to identify the suitable genotypes for changing climatic conditions. The study revealed that rice genotypes performed better under elevated CO2, with slight changes in development, such as growth and in yield attributing traits, depending on the genotypes. However, the beneficial direct impact of elevated (CO2) on crop yield can be counteract by elevated temperatures. Rice genotype IR83376-B-B-24-2 was highly responsive while IR84895-B-127-CRA-5-1-1 was least responsive toward elevated CO2. Physiological traits like relative water content (RWC %), membrane stability index (MSI %), chlorophyll content, photosynthetic rate and TSS content were improved under elevated CO2. However, responses of these traits were negative with elevated temperature. We point out that studies related to changes in crop physiology and yield as a consequence of global climatic changes should be a priority due to their association with food security.
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篇名 Influence of Rising Atmospheric CO<sub>2</sub>Concentrations and Temperature on Morpho-Physiological Traits and Yield of Rice Genotypes in Sub Humid Climate of Eastern India
来源期刊 美国植物学期刊(英文) 学科 医学
关键词 Climate Change Physiological Traits Rice GENOTYPES YIELD Attributes
年,卷(期) 2015,(14) 所属期刊栏目
研究方向 页码范围 2239-2249
页数 11页 分类号 R73
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研究主题发展历程
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Climate
Change
Physiological
Traits
Rice
GENOTYPES
YIELD
Attributes
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研究分支
研究去脉
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期刊影响力
美国植物学期刊(英文)
月刊
2158-2742
武汉市江夏区汤逊湖北路38号光谷总部空间
出版文献量(篇)
1814
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0
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