Photosynthetica 2007, 45(4):510 | DOI: 10.1007/s11099-007-0088-z

A new viewpoint to understand the response of leaf dark respiration to elevated CO2 concentration

Y. Z. Qiao1, Y. B. Zhang1, K. Y. Wang1,2,*, Y. P. Wang2, Y. Xu1, Q. C. Li1
1 Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, P. R. China
2 Shanghai Key Laboratory of Urbanization Processes and Ecological Restoration, East China Normal University, Shanghai, P. R. China

By investigating the R D-C a (dark respiration rate-atmospheric CO2 concentration) and P N (net photosynthetic rate)-C a curves of bamboo (Fargesia denudata) and poplar (Populus cathayanna), we found that: (1) the minimal R D was close to ambient CO2 concentration, and the elevated or decreased atmospheric CO2 concentration enhanced the R D of both species; (2) the response curves of R D-C a were simulated well by quadratic function. This phenomenon might be an inherent property of leaf R D of F. denudata and P. cathayanna. If this was true, it implies that effect of CO2 on R D could be interpreted with the relationship of R D-C a curves and the quadratic function.

Additional key words: controlled environment chambers; Fargesia denudata; net photosynthetic rate; Populus cathayanna; species differences

Received: November 23, 2006; Accepted: March 26, 2007; Published: December 1, 2007  Show citation

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Qiao, Y.Z., Zhang, Y.B., Wang, K.Y., Wang, Y.P., Xu, Y., & Li, Q.C. (2007). A new viewpoint to understand the response of leaf dark respiration to elevated CO2 concentration. Photosynthetica, 45(4), 510. doi: 10.1007/s11099-007-0088-z
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