Highlights
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Discolouration of Jerusalem artichokes was measured by instrumental colour analysis.
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Sensory analysis of colour attributes of raw and boiled tubers was performed.
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Contents of total phenolics, phenolic acids, iron and organic acids were analysed.
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Enzymatic browning was the same independent of variety and harvest time.
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Analysed constituents could not explain discolourations of raw and boiled tubers.