Elevated CO2 Enhances Dynamic Photosynthesis in Rice and Wheat

• DOI: 10.3389/fpls.2021.727374
• Publication Date: 2021-10-01T09:30:25Z
• Authors: Huixing Kang; Ting Zhu; Yan Zhang; Xinran Ke; Wenjuan Sun; Zhenghua Hu; Xinguang Zhu; Haihua Shen; Yao Huang; Yanhong Tang
• Keywords: Impacts of Elevated CO2 and Ozone on Plant Physiology; 0301 basic medicine; Atmospheric Science; Acclimatization; Organic chemistry; photosynthetic induction; Oryza sativa; Plant Science; acclimation; Japonica; Horticulture; Poaceae; Biochemistry; Gene; SB1-1110; Agricultural and Biological Sciences; 03 medical and health sciences; Atmospheric Aerosols and their Impacts; wheat; Photosynthesis; Biology; 2. Zero hunger; elevated CO2; Global and Planetary Change; dynamic photosynthesis; Global Forest Drought Response and Climate Change; rice; Botany; Plant culture; Life Sciences; 15. Life on land; Earth and Planetary Sciences; Chemistry; Carbon dioxide; Physical Sciences; Environmental Science; Cultivar; Animal science; CO2 Enrichment

Crops developed under elevated carbon dioxide (eCO2) exhibit enhanced leaf photosynthesis steady states. However, little is known about the effect of eCO2 on dynamic and relative contribution short-term (substrate) long-term (acclimation) effects eCO2. We grew an Oryza sativa japonica cultivar a Triticum aestivum 400 μmol CO2 mol-1 air (ambient, A) 600 (elevated, E). Regardless growth [CO2], photosynthetic responses to sudden increase decrease in light intensity were characterized (a) or (e). The Aa, Ae, Ea, Ee treatments employed quantify acclimation (Ae vs. Aa Ea) substrate (Aa Ae Ea Ee). In comparison with treatment, both steady-state rate (PN) induction state (IS) higher but lower treatment species. IS reached at 60 sec after intensity, time required for induction, efficiency did not differ significantly from those treatment. increased accumulative gain (ACG) during by 45.5% rice 39.3% wheat, whereas decreased ACG 18.3% it 7.5% wheat. Thus, eCO2, either measurement, enhances crop This indicates that loss due limitation may be reduced future, high-CO2 world.