2.7. Statistical analyses.
A completely randomized design was used in this experiment and repeated in triplicate. One-way ANOVA was performed using GraphPad Prism software Multiple comparisons of every mean to a control mean was determined using Dunnett’s test at P <0.05 (*),P <0.01 (**), P <0.005(***) andP <0.001 (****) (ANOVA test). All data plotted in figures are presented as mean ± standard deviation.