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A new approach based on the use of the surfactant Pluronic F-68 to obtain non-lethal release of plant cell intracellular products was investigated. Suspension cultures of Morinda citrifolia (Rubiaceae), producing anthraquinones as secondary metabolites, were selected as model system. By supplementing the growth medium with 2% w/v of Pluronic F-68 for four repeated batch cycles, cells released anthraquinones...