Table 2.
Hydroxycinnamoylquinic acid level in Coffea canephora leaves collected at different growth stages, from the youngest (1) to the oldest node (6)
| Hydroxycinnamoylquinic acid level (mg leaf−1) |
||||
|---|---|---|---|---|
| Node no. | 5-CQA | DiCQA | 5-FQA | CGAss |
| 1 | 4·04 a | 3·78 a | 0·13 a | 7·82 a |
| 2 | 4·25 a | 2·44 b | 0·10 a | 6·68 ab |
| 3 | 4·43 a | 1·53 c | 0·08 a | 5·95 b |
| 4 | 4·49 a | 1·37 c | 0·10 a | 5·86 bc |
| 5 | 3·66 a | 1·24 c | 0·09 a | 4·90 cd |
| 6 | 3·65 a | 0·37 d | 0·07 a | 4·02 d |
For each node, the individual value, expressed in percentage of dry matter (% d. wt) was the average of six values resulting from three different extractions of a mixture of five leaves from each of two trees.
5-CQA, 5-caffeoylquinic acid; DiCQA, dicaffeoylquinic acids (3,4-, 3,5- and 4,5-dicaffeoylquinic acid); 5-FQA, 5-feruloylquinic acid; CGAss, caffeoylquinic acids (CQA + DiCQA).
For the same node, values followed by the same letter indicate no significant difference between stages at P ≤ 0·05 according to one-way ANOVA.