Initial fluorescence (a,b) in sour passion fruit cv. BRS GA1 under irrigation depths, pit volumes, and different doses of water-retaining polymer; variable fluorescence (c) and maximum fluorescence (d) under irrigation depths and pit volumes. Means with same lowercase letters do not differ in irrigation depths of 70% and 100% ETc within the same dose of the water-retaining polymer and pit volume according to the Tukey test at 0.05 probability, and means with same uppercase letters do not differ in pit volumes of 64 and 128 dm3 within each dose of water-retaining polymer and irrigation depth according to the Tukey test (p > 0.05). (a,b). Means with same lowercase letters do not differ in pit volumes of 64 and 128 dm3 within each irrigation depths according to the Tukey test at 0.05 probability, and means with equal capital letters not differ in irrigation depths of 70% and 100% within each pit volume according to the Tukey test at 0.05 probability (c,d).