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Content of cynaropicrin in stalks of cardoon (Cynara cardunculus var. altilis DC cv. Pieno Inerme Lucchese; PIL and Cynara cardunculus var. altilis DC cv. Plain Blanc Inerme; PBI). Raw, blanched, and blanched+boiled cardoon stalks are represented by closed, open, and gray bars, respectively. For each cultivar separately, means (±SE; n = 3) indicated by different letters differ significantly (p ≤ 0.05).
