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Acta Agronomica Sinica ›› 2020, Vol. 46 ›› Issue (12): 1819-1830.doi: 10.3724/SP.J.1006.2020.02027

• REVIEW •     Next Articles

Physiological response of crop to elevated atmospheric carbon dioxide concentration: a review

Yan-Sheng LI1,2,*(), Jian JIN2,*(), Xiao-Bing LIU2   

  1. 1Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences / Key Laboratory of Agricultural Environment, Ministry of Agriculture and Rural Affairs, Beijing 100081, China
    2Key Laboratory of Mollisols Agroecology / Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin 150081, Heilongjiang, China
  • Received:2020-04-15 Accepted:2020-08-19 Online:2020-12-12 Published:2020-11-25
  • Contact: Yan-Sheng LI,Jian JIN E-mail:liyansheng@iga.ac.cn;jinjian@iga.ac.cn
  • Supported by:
    Key Laboratory for Agricultural Environment, the Ministry of Agriculture of China;National Key Research and Development Program of China(2017YFD0300300);National Natural Science Foundation of China(31501259)

Abstract:

The increase of atmospheric concentration of carbon dioxide ([CO2]) has substantially had a huge impact on agricultural production. As the sole substrate for photosynthesis, the increase of atmospheric [CO2] stimulates the net photosynthetic rate, thus promoting the biomass accumulation and yield level in many crops. However, the ‘fertilization’ effect of the elevated atmospheric [CO2] on crop production is less than theoretical expectation, and elevated [CO2] increases the health risk due to the decline in grain quality. The relevant mechanism is still unclear. In this paper, we analyzed the effect of elevated [CO2] on crop photosynthesis system, reviewed various responses of key photosynthesis indicators, such as the leaf net photosynthetic rate, the intercellular [CO2] of leaves, maximum carboxylation rate of Rubisco (Vc, max), and the capacity of Rubp-regeneration (Jmax) in different crops, in response to the elevated atmospheric [CO2]. Based on the C-N metabolism of the whole plant, we summarized two prevailing hypotheses about the acclimation of photosynthetic capacity under elevated atmospheric [CO2], namely the source-sink regulation mechanism and N limitation mechanism, respectively. We summarized the influence of elevated [CO2] on the nutritional quality of the grain, such as the change in the protein, oil, mineral elements, and vitamin concentrations. Furthermore, we also reviewed the potential interactive effect of the elevated atmospheric temperature and [CO2] on crop growth. Finally, the main research directions of this field in the future are proposed. In summary, this review can provide theoretical reference for accurately assessing the changes in crop yield and quality under climate change conditions, maximizing the ‘fertilization’ effect of elevated [CO2], and mitigating the adverse effects of climate change on crop production.

Key words: climate change, global warming, rice, wheat, soybean, maize

Fig. 1

Annual and monthly changes of atmospheric concentration of CO2 from 1958 to 2020 The data between the two blue dashed lines represent the increases of CO2 concentration per 10 years. The black dashed line represents the highest atmospheric CO2 concentration measured in May 2019. All the data in this figure are from https://www.esrl.noaa.gov/gmd/ccgg/trends/data.html."

Fig. 2

Calvin cycle (black lines) and photorespiration (red lines) This schematic diagram is modified according to https://www.knowablemagazine.org/article/sustainability/2017/photosynthesis-fix."

Fig. 3

Hypothesis of the photosynthetic acclimation under elevated atmospheric CO2 concentration in C3 crop (soybean)"

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