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Relationships between the CO2 compensation concentration, the slope of CO2 curves of net photosynthetic rate and the energy of irradiance

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Biologia Plantarum

Abstract

Relationships between the CO2 compensation concentration, the slope of CO2 curves of Pn and the energy of irradiance were studied in adult leaves ofFagus silvatica L. seedlings. A gazometric method of quantitative analysis of air flow, in a closed system, was applied.

Pn and the slope of CO2 curve of Pn increased with increasing irradiance at constant temperature of the abaxial leaf surface (19 ± 0.5 °C), however, the CO2 compensation concentration decreased. This physiological characteristic changed relatively slightly at irradiance close to saturation irradiance (235 Wm−2).

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  1. Institute of Experimental Biology and Ecology of the Slovak Academy of Sciences, Dúbravská cesta 26, 885 34, Bratislava, Czechoslovakia

    Elena Masarovičova

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  1. Elena Masarovičova
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Masarovičova, E. Relationships between the CO2 compensation concentration, the slope of CO2 curves of net photosynthetic rate and the energy of irradiance. Biol Plant 21, 434–439 (1979). https://doi.org/10.1007/BF02889485

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  • DOI: https://doi.org/10.1007/BF02889485

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