Photosynthesis and yield response to elevated CO2, C4 plant foxtail millet behaves similarly to C3 species
Article
Article Title | Photosynthesis and yield response to elevated CO2, C4 plant foxtail millet behaves similarly to C3 species |
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ERA Journal ID | 2656 |
Article Category | Article |
Authors | Li, Ping (Author), Li, Bingyan (Author), Seneweera, Saman (Author), Zong, Yuzheng (Animator), Li, Frank Yonghong (Author), Han, Yuanhuai (Author) and Hao, Xingyu (Author) |
Journal Title | Plant Science |
Journal Citation | 285, pp. 239-247 |
Number of Pages | 9 |
Year | 2019 |
Place of Publication | Ireland |
ISSN | 0168-9452 |
1873-2259 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.plantsci.2019.05.006 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0168945218315516?via%3Dihub |
Abstract | Foxtail millet (Setaria italica) is a nutrient-rich food source traditionally grown in arid and semi-arid areas, as it is well adapted to drought climate. Yet there is limited information as how the crop responses to the changing climate. In order to investigate the response of foxtail millet to elevated [CO2] and the underlying mechanism, the crop was grown at ambient [CO2] (400 μmol mol−1) and elevated [CO2] (600 μmol mol−1) in an open-top chamber (OTC) experimental facility in North China. The changes in leaf photosynthesis, chlorophyll fluorescence, biomass, yield and global gene expression in response to elevated [CO2] were determined. Despite foxtail millet being a C4 photosynthetic crop, photosynthetic rates (PN) and intrinsic water-use efficiency (WUEi), were increased under elevated [CO2]. Similarly, grain yield and above-ground biomass also significantly increased (P < 0.05) for the two years of experimentation under elevated [CO2]. Increases in seeds and tiller number, spike and stem weight were the main contributors to the increased grain yield and biomass. Using transcriptomic analyses, this study further identified some genes which play a role in cell wall reinforcement, shoot initiation, stomatal conductance, carbon fixation, glycolysis / gluconeogenesis responsive to elevated [CO2]. Changes in these genes reduced plant height, increased stem diameters, and promote CO2 fixation. Higher photosynthetic rates at elevated [CO2] demonstrated that foxtail millet was not photosynthetically saturated at elevated [CO2] and its photosynthesis response to elevated [CO2] were analogous to C3 plants. |
Keywords | elevated [CO2], foxtail millet, photosynthesis, yield, gene expression |
ANZSRC Field of Research 2020 | 410499. Environmental management not elsewhere classified |
300499. Crop and pasture production not elsewhere classified | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Shanxi Agricultural University, China |
National Institute of Fundamental Studies, Sri Lanka | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q55y6/photosynthesis-and-yield-response-to-elevated-co2-c4-plant-foxtail-millet-behaves-similarly-to-c3-species
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