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Unsupervised hierarchical cluster analysis of maize roots metabolomics profiles, obtained by UHPLC‐ESI/QTOF‐MS untargeted analysis, as a function of the seed treatment with biostimulants. A fold‐change based heatmap was built and samples were clustered according to Ward's algorithm, based on Euclidean distances. T1: Control; T2: AMF‐based product; T3: B. megaterium PGPR formulation
