Revista Facultad Nacional de Agronomía, Medellín
versão impressa ISSN 0304-2847
MOSQUERA SANCHEZ, Lyda Patricia; RIANO HERRERA, Néstor Miguel; LOPEZ FORERO, Yamel e ARCILA PULGARIN, Jaime. NET PHOTOSYNTHESIS AND CO2 COMPENSATION CONCENTRATION IN THREE COFFEE (Coffea sp.) GENOTYPES, BEAN AND MAIZE UNDER THREE TEMPERATURES. Rev.Fac.Nal.Agr.Medellín [online]. 2005, vol.58, n.2, pp. 2827-2838. ISSN 0304-2847.
The coffee (Coffea arabica L.) genotypes Colombia, Caturra, and Híbrido de Timor, and bean (Phaseolus vulgaris L.) and maize (Zea mays L.) plants were exposed to three temperatures ( 15°C, 25°C and 35°C), and net photosynthetic rates (PN) and CO2 compensation concentrations (GCO2) were measured. PN in coffee leaves was similar for the three genotypes at 15 °C [5,0 - 5,3 µmol(CO2) m-2s-1] and 35 °C [4,9 - 5,5 µmol(CO2) m-2s-1], but lower at 25 °C [5,4 - 11,7 µmol(CO2) m-2s-1]. GCO2 increased with temperature in coffee and bean, while in maize no effect was observed. PN and GCO2 values documented in coffee genotypes were typical for C3 plants.
Palavras-chave : Coffee; Coffea arabica L.; CO2 compensation concentration; leaf temperature; net photosynthesis; bean; maize.