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Effects of polysulfides (Na2Sn) on root abscission. Root abscission is represented as % of the total number of the roots. Azolla was incubated for 24 h with a 10 mM Hepes-KOH (pH 7.0) buffer containing 500 µM polysulfide (Na2Sn). The values are means ± SE (n = 3). A significant difference is indicated as * (p < 0.05).
