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Chemical and Biological Technologies in Agriculture
Fig. 2 | Chemical and Biological Technologies in Agriculture

Fig. 2

From: Improving organic grape production: the effects of soil management and organic fertilizers on biogenic amine levels in Vitis vinifera cv., 'Royal' grapes

Fig. 2

Effect of soil management on BAs contents (µg·L−1) in 'Royal' grape cultivars depending on fertilizer application and years of research and a hierarchical clustering heatmap demonstrating the relative concentrations of BAs. Significance level at p ≤ 0.05 was detected for the applications and stress factors (Duncan test). Different letters on bars represent statistical differences (a: Tryptamine, b: Serotonin, c: Trimethylamine, d:  Dopamine, e: Norepinephrine, f: hierarchical clustering heatmap)

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