Therefore, data sets from the replicate experiments were pooled
for the purposes of further statistical analysis. The significance of
treatment effects was analyzed within Statistical Package for the
Social Sciences (SPSS 11.0, SPSS Inc.) by either (i) normally
distributed data (one-way analysis of variance with post hoc
pairwise least significance difference comparisons, P = 0.05), or
(ii) non-normally distributed data (the Kruskal-Wallis H test).