A SIMPLE METHOD TO EVALUATE PHOTOSYNTHETIC CAPACITY IN RICE (ORYZA SATIVA L.)

PUIG LUCRECIA; VIDAL ALFONSO; RODRÍGUEZ ANDRÉS ALBERTO; MAIALE SANTIAGO

Congreso; XXXII RAFV and XVI CLFV; 2018

Rice is a C3 plant and has a lower photosynthetic ca-pacity in comparison with other crops such as corn.Then, the increase of the photosynthetic potential is asignificant new criteria in rice breeding programs todevelop cultivars with higher yield potential. Photos-ynthetic measurement as gas exchange is complex and time-consuming. The objective of this work was to eva-luate the relation between net photosynthesis rate (Pn),stomatal conductance (Gs) and canopy temperature (T)estimated through infrared thermography. Two rice Cul-tivars, Nutriar and Camba were grown in 3 plot in 2017in INTECH (Chascomus, BA), measurements were madebetween tillering and grain maturity stage. Camba dis-played significantly (P < 0.05) lower leaf temperature,higher Gs and Pn than Nutriar. It was also shown therelation between Gs, Pn and Temperature. These resultssuggest that infrared thermography may be a simplemethod to evaluate varietal differences in Gs and Pnthrough canopy temperature.