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