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| Influence of elevated atmospheric CO2 and temperature on microelement accumulation in rice |
| Received:December 20, 2016 |
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| KeyWord:elevated CO2 concentration;elevated temperature;rice;microelement;accumulation |
| Author Name | Affiliation | E-mail | | LI Chun-hua | State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
University of Chinese Academy of Sciences, Beijing 100080, China | | | ZENG Qing | State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | | | SHA Lin-nan | Institute of Biology and Environment, Nanjing Forestry University, Nanjing 210037 | | | ZHANG Ji-shuang | State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
University of Chinese Academy of Sciences, Beijing 100080, China | | | ZHU Jian-guo | State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | jgzhu@issas.ac.cn | | LIU Gang | State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | |
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| Abstract: |
| To investigate the influence of elevated CO2 concentration([CO2])(+200 μL·L-1) and elevated temperature(+1 ℃) on microelement accumulation in rice(Oryza Sativa L.) in future climate conditions, a field experiment was carried out on the Temperature and Free Air CO2 Enrichment(T-FACE) platform. The results showed that elevated [CO2] enhanced the accumulation of microelements in the panicle, with significant increases in Fe accumulation in 2013(16.7%) and Zn accumulation in 2014(30.8%). Rising temperature significantly reduced the accumulation of Fe in the panicle and the accumulation of Mn and Zn in the leaf. The decreases were 30.2%, 40.2%, and 57.3%, respectively. There was a declining trend of accumulation of these microelements in vegetative organs under the elevated [CO2] and temperature combination. Specially, the Zn accumulation in the leaf decreased significantly, by 40.0%, in 2013. Additionally, elevated [CO2] reduced the Fe accumulation but increased the Mn and Zn accumulation in the grain. In particular, a significant reduction of 47.5% of Fe in 2013 and increase of 43.4% of Zn in 2014 were observed. Meanwhile, elevated temperature decreased the accumulation of Fe, Mn, and Zn in rice grain in both years. Declining trends for microelement accumulation in rice grain under the combination of elevated [CO2] and temperature were detected both in 2013 and 2014, but the degrees of reduction in 2013 were greater than those in 2014. All these results demonstrated that CO2 enrichment could, to some extent, alleviate the effects of rising temperature on microelement accumulation in the future. |
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