A new viewpoint to understand the response of leaf dark respiration to elevated CO2 concentration.
- Resource Type
- Article
- Authors
- Y.-Z. Qiao; Y.-B. Zhang; Y.-P. Wang; Y. Xu; Q.-C. Li
- Source
- Photosynthetica. Dec2007, Vol. 45 Issue 4, p510-514. 5p.
- Subject
- *CARBON dioxide
*RESPIRATION in plants
*PLANT physiology
*PLANT growth
- Language
- ISSN
- 0300-3604
Abstract 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. [ABSTRACT FROM AUTHOR]