Figure 4.

Effect of water deficit on the color of tomato fruit skin. (A) Brightness parameter (L*); (B) red and green parameters (a*); (C) yellow and blue parameters (b*); (D) color saturation (C*). CK: normal irrigation, spontaneously once in 3 days; T1: irrigating once in 4 days; T2: irrigating once in 5 days; T3: irrigating once in 6 days; T4: irrigating once in 7 days; T5: irrigating once in 8 days. The histogram features a short vertical line denoting the mean ± SE (n = 3), with a significance threshold of p < 0.05. Distinct lowercase letters indicate the variation in treatment effects.