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The effect of applying various concentrations of Ca nanoparticles (Ca0, Ca1, Ca2, Ca3, Ca4 mM) and various concentrations of putrescin on (Pu0, Pu1, Pu2, Pu3, Pu4) Safranal level (µgr/g) in tissues of Crocus sativus L. The mean values were the results of three separate experiments. Data represent the mean ± SD, n = 3; LSD: least significant difference; significance level: P < 0.05. Each column of means that have at least one letter in common were not significantly different
