Ribulose-1, 5-bisphosphate carboxylase activity,chlorophyll and protein concentrations in differentPopulus clones |
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| Authors: | R. Ceulemans F. Van Assche I. Impens H. Clusters |
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| Affiliation: | (1) Department of Biology, University of Antwerp, UIA, Universiteitsplein 1, B-2610 Wilrijk, Belgium;(2) Department SBM, University Center of Limburg, LUC, Universitaire Campus, B-3610 Diepenbeek-Hasselt, Belgium |
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| Abstract: | Ribulose-1,5-bisphosphate carboxylase activity (RuBPC), chlorophyll (chl) and protein (prot) concentrations and chlorophyll/protein (chl/prot) ratios were determined in five differentPopulus clones together with their maximal net CO2 uptake rates (Pmax). A classic reference clone (Populus ×euramericana “Robusta” (Dode) Guinier) was compared with four recently selected euramerican and interamerican crossings. Chl/prot ratio and RuBPC activity varied among the different clones, while chl a/chlb ratio showed only a very low coefficient of variation (1.7%) for the five clones. Poplar clone “Robusta” could be distinguished from the recent faster growing clones based on the different biochemical characteristics. A significant correlation was found between both total chl concentration and chl/prot ratio with Pmax for the five clones. |
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| Keywords: | chlorophylla / chlorophyllb ratio Populus trichocarpa ×Populus deltoides net CO2 exchange rate |
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