The purpose of this study was asses the influence of light spectrum and phytohormones variations on photomorphogenesis and water consumption by pomegranate cuttings and environmental microclimate changes. The research was carried out from August to November of 2018, on a completely randomized design, in a 4x4 factorial scheme, and with three replications. Four phytohormones concentrations (0, 25, 50, and 100%) and four light conditions (white, blue, red, and extreme red lights) were applied. The numbers of shoots were recorded weekly. The numbers of surviving roots and shoots were calculated 60 days after cutting planting. Throughout the experimental period, the environments were monitored to establish the illuminance, average air temperature, relative air humidity, average soil temperature, and evapotranspiration water consumption by the cuttings. Shoots were observed on the cuttings under white and blue lights with application of 0, 25, 50, and 100% of phytohormones. All microclimatic variables were influenced by light conditions. Variations in light spectrum and phytohormones concentrations influence photomorphogenesis and water consumption by pomegranate cuttings and promote environmental microclimate changes.
Keywords: Punica granatum, light quality, temperature, relative humidity, water requirement.