Seasonal Variation in Physiological Traits of Amazonian Coffea canephora Genotypes in Cultivation Systems with Contrasting Water Availability

Climate variation throughout the year affects photosynthesis and other physiological processes correlated with plant development yield. This study aimed to evaluate changes in attributes of Coffea canephora genotypes over Brazilian Amazon assess their relationship crop The experiment was carried out three cultivation systems genotypes. evaluations were four periods: peak dry season (S1); beginning rainy (S2); (S3); (S4). A dataset gas exchange, pigment indices, chlorophyll fluorescence, branch growth, coffee yield obtained. group exchange variables main contributor treatment discrimination most affected by seasons. As expected, values gs, E, significantly lower S1, while VPDLeaf-ar, TLeaf, IWUE higher. Our results demonstrate that climatic seasonality Amazonian Robustas coffee, even under irrigated conditions, particularly response increased VPD. analyzed at leaf level, different periods, did not explain differences C. canephora.