Fig. 3From: Phenotypic variation of root-system architecture under high P and low P conditions in potato (Solanum tuberosum L.)Heat map showing Person’s correlation coefficients among z-score standardized root traits assessed at high (HP) and low P (LP). *P < 0.05; **P < 0.01; ***P < 0.001; NS, not significant; NA, not availableBack to article page