Fig. 4.

Pearson’s correlation analysis (A), principal component analysis (B) and cluster analysis (C) of the mineral elements in tomato at different levels of water deficiency. The data are expressed as average values (n = 3). The * and ** represent significant correlations at the p < 0.05 and p < 0.01 levels, respectively (two-tailed). Abbreviations: CK: The control with full irrigation of 90% the maximum field moisture capacity (FMC); T1: Substrate maintained at 80% maximum FMC; T2: Substrate maintained at 65% maximum FMC; T3: Substrate maintained at 55% maximum FMC; T4: Substrate maintained at 45% maximum FMC.