Figure 6.
Changes in the levels of free and bound forms of putrescine, spermidine, and spermine (ɳmol/g FW) in floral buds and ovaries of WT and ySpdSyn-expressing transgenic tomato plants. Free and bound PAs were extracted and quantified by HPLC, as described in the Material and Methods section. Shown are average ± standard error (n ≥ 3 biological replicates). Similar letters above standard error bars indicate non-significant difference (at 95% confidence interval) among genotypes.