Fig. 3 – Effect of cooking on recovery of rutin in green asparagus. (a) Rutin concentration (mg/g DW) of raw control (C) and
cooked spears. (b) Rutin (mg) recovered from the liquid or residue remaining after cooking. Data are pooled over two years
(a only). ANOVA were conducted on natural logarithm (a) or square root-transformed (b) data; means (n = 4 to 10 (a); n = 3
to 4 (b)) have been backtransformed for clarity. Means for individual treatments with the same letter are not significantly
different according to a Tukey’s test on transformed data (α = 0.05). The concentration of rutin in cooked spears, as a
percentage of that in raw spears (a), or rutin recovery as a percentage of the initial amount in spears (b), is presented
above each bar.