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Changes in polyamines (PAs) in cells and cultivation media of alfalfa (Medicagosativa L.) and tobacco bright yellow 2 (BY-2) (Nicotianatabacum L.) cell suspension cultures were studied over their growth cycles. The total content of PAs (both free and conjugated forms) was nearly 10 times higher in alfalfa, with high level of free putrescine (Put) (in exponential growth phase it represented about...
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