Fanjuan Meng¹ , Ruyu Xie¹ , Mu Peng¹ , Tao Wang¹ , Fachun Guan²

1 College of Life Science, Northeast Forestry University, Harbin 150040, China
2 Tibet Agricultural and Animal Husbandry University, Linzhi 860000, China
Author    Correspondence author
International Journal of Molecular Evolution and Biodiversity, 2019, Vol. 9, No. 1   doi: 10.5376/ijmeb.2019.09.0001
Received: 08 Jan., 2019    Accepted: 10 Mar., 2019    Published: 23 May, 2019

This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Xie R.Y., Peng M., Wang T., Meng F.J., and Guan F.C., 2019, Effect of elevated CO₂ concentration on four populus by the fast fluorescence rise OJIP, International Journal of Molecular Evolution and Biodiversity, 9(1): 1-8 (doi: 10.5376/ijmeb.2019.09.0001)

Increased atmospheric carbon dioxide (CO₂) can influence the stability of ecosystems in the world. The chlorophyll fluorescence technique was considered as an effective tool to evaluate the photosynthetic levels on many plant species. In this study, we analyzed the state of PSII on four kinds of populus (Populus L.) (populus X, Pop ulusdeltoides × cathayana, Poplus alba ′Berdinensis′ L, Populus euramerican ′N3016′ × Populus ussuriensis) under high CO₂ condition. The results show that the PSII performance was negatively influenced by CO₂ stress. High CO₂ stress resulted in down-regulation of Fm, φPo (=Fv/Fm), ψEo, φEo and PItotal in four kinds of populus. And a significant decrease in the P-step level of the fluorescence transients OJIP curves of four populus species after 7 days of treatment was observed. Therefore, a fast decrease of the P-step level indicated there was main change to fluorescence transients. These results indicated that changes of PSII attribute to the degradation of antenna pigment and inhibition of the electron transport at the acceptor side of PSII.

Populus L.; Atmospheric carbon dioxide (CO2); Photosynthetic performance; OJIP