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The effects of UV-B irradiation and Biomin (a natural substance extracted from coal with active ingredients of humic acids) on the content of endogenous polyamines spermine, spermidine and putrescine, and free amino acids in shoots and roots of young triticale seedlings were investigated. Biomin was added to the nutrient medium 3 days prior to UV-B irradiation. The seedlings were treated with 7.7 kJ m...
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