TABLE 4.
Rosmarinic acid content (mg/100 g of dry matter) determined by HPTLC for the three Mentha species collected from different regions of Algeria.
| Plant species | Visible detection mode | Fluorescence detection mode |
|---|---|---|
| M. pulegium | ||
| MP1 | 1.67 ± 0.26b | 1.79 ± 0.43b |
| MP2 | 1.52 ± 0.37b | 1.46 ± 0.40b |
| MP3 | 0.37 ± 0.08c | 0.40 ± 0.10c |
| MP4 | 0.52 ± 0.18c | 0.64 ± 0.01d |
| MP5 | 2.56 ± 0.29a | 2.70 ± 0.04a |
| MP6 | 1.53 ± 0.42b | 1.48 ± 0.59b |
| M. rotundifolia | ||
| MR1 | 0.66 ± 0.05c | 0.65 ± 0.08c |
| MR2 | 1.41 ± 0.05a | 1.40 ± 0.13a |
| MR3 | 1.18 ± 0.08b | 1.15 ± 0.16b |
| MR4 | 0.11 ± 0.01d | 0.11 ± 0.00d |
| MR5 | 1.71 ± 0.08a | 1.75 ± 0.02a |
| MR6 | 1.16 ± 0.00b | 1.16 ± 0.02b |
| M. spicata | ||
| MS1 | 0.27 ± 0.03e | 0.31 ± 0.03e |
| MS2 | 0.02 ± 0.00f | 0.02 ± 0.00f |
| MS3 | 0.45 ± 0.06d | 0.49 ± 0.03d |
| MS4 | 3.68 ± 0.05a | 3.71 ± 0.05a |
| MS5 | 1.76 ± 0.06b | 1.85 ± 0.01b |
| MS6 | 0.97 ± 0.16c | 1.07 ± 0.06c |
MP1 to MP6 refer to Mentha pulegium samples collected respectively in the following localities: 1-El-Ghaba; 2-Thybyatine; 3-Tizi-Ouzou; 4-Khemis-Meliana; 5-Tichy; and 6-Chemini. MR1 to MR6 refer to the samples of Mentha rotundifolia collected in: 1-El-Ghaba; 2-Thybyatine; 3-Tizi-Ouzou; 4-Khemis-Meliana; 5-Tajboujth; and 6-Chemini. MS1 to MS2 refer to Mentha spicata samples collected in: 1-El-Ghaba; 2-Thybyatine; 3-Tizi-Ouzou; 4-Khemis-Meliana; 5-Tichy; and 6-Tajboudjth.
The values not bearing the same letters within samples of the same species collected in different regions are significantly different (p ≤ 0.05), and the results are ranked in descending order; a > b > c > d > e > f. The numbers written in bold indicate the highest values.