Table 2 Effect of long-term storage on the condensed tannin, free gallic acid and gallotannin contents of 21 South African medicinal plants
From: Antioxidant and acetylcholinesterase-inhibitory properties of long-term stored medicinal plants
Plant name | Plant part(s) | Condensed tannins (% in dry matter) | Free gallic acid (μg GAE/g DW) | Gallotannins (μg GAE/g DW) | |||
|---|---|---|---|---|---|---|---|
Stored | Fresh | Stored | Fresh | Stored | Fresh | ||
Acokanthera oppositifolia δ | Roots | 0 | 0 | 2.996 ± 2.9963 ns | 1.284 ± 1.2841 | 32.960 ± 0.4281 * | 60.355 ± 6.4207 |
Artemisia afra # | Aerial parts | 0.078 ± 0.0005 *** | 0 | 0 | 0 | 76.621 ± 6.4207 ns | 97.167 ± 10.7012 |
Artemisia afra δ | Aerial parts | 0.004 ± 0.0002 * | 0 | 0 | 0 | 27.823 ± 11.5573 * | 97.167 ± 10.7012 |
Buddleja salviifolia # | Leaves | 0.011 ± 0.0002 * | 0.056 ± 0.0073 | 29.535 ± 20.1183 ns | 0 | 80.720 ± 17.0557 ns | 41.949 ± 1.7122 |
Buddleja salviifolia # | Twigs | 0.017 ± 0.0047 ns | 0.005 ± 0.0050 | 17.122 ± 3.4244 ns | 8.133 ± 5.5646 | 14.982 ± 8.1329 ns | 38.096 ± 17.5500 |
Clausena anisata # | Leaves & Twigs | 1.394 ± 0.0318 ns | 1.329 ± 0.0159 | 0 | 0 | 68.488 ± 5.1366 ** | 0 |
Cussonia spicata # | Leaves | 0.012 ± 0.0016 * | 0 | 138.260 ± 41.5208 ns | 12.842 ± 12.8415 | 397.377 ± 55.8931 ns | 468.758 ± 81.3346 |
Dombeya rotundifolia # | Leaves | 1.804 ± 0.0116 ** | 0.973 ± 0.0529 | 0 | 0 | 41.949 ± 19.6903 ns | 0 |
Ekebergia capensis δ | Leaves & Twigs | 0.654 ± 0.0040 ns | 0.523 ± 0.0706 | 0 | 0 | 0 ** | 19.690 ± 2.5683 |
Leonotis intermedia δ | Leaves | 0.008 ± 0.0007 ** | 0 | 0 ns | 3.424 ± 3.4244 | 17.550 ± 5.5646 ns | 11.129 ± 4.2805 |
Leonotis leonurus δ | Leaves | 0.011 ± 0.0002 *** | 0 | 0 *** | 47.085 ± 1.7122 | 24.827 ± 0.8561 * | 5.565 ± 3.8524 |
Merwilla plumbea δ | Bulbs | 0 | 0 | 8.133 ± 8.1329 ns | 23.971 ± 7.7049 | 167.367 ± 13.2695 | ND |
Ocotea bullata δ | Bark | 1.154 ± 0.0162 ** | 0.699 ± 0.0354 | 0 | 0 | 68.060 ± 8.9890 * | 14.982 ± 7.2768 |
Olea europaea # | Leaves | 0.010 ± 0.0019 * | 0 | 0 | 0 | 127.559 ± 4.2805 ns | 121.566 ± 1.7122 |
Pittosporum viridiflorum # | Leaves & Twigs | 0 | 0 | 5.565 ± 5.5646 ns | 0 | 75.337 ± 0.8561 ns | 66.776 ± 6.8488 |
Plumbago auriculata δ | Leaves | 0.003 ± 0.0011 ** | 0.024 ± 0.0013 | 3.852 ± 3.8524 ns | 0 | 20.118 ± 5.5646 ns | 4.7085 ± 4.7085 |
Protorhus longifolia δ | Leaves | 0.400 ± 0.0127 ns | 0.724 ± 0.0885 | 2398.787 ± 112.1485 ns | 1901.394 ± 137.8318 | 2726.245 ± 615.9627 ns | 4039.926 ± 1368.0443 |
Solanum mauritianum δ | Leaves | 0.013 ± 0.0013 ns | 0.005 ± 0.005 | 32.103 ± 4.7085 ns | 23.971 ± 0.8561 | 183.047 ± 75.6858 | ND |
Spirostachys africana # | Leaves & Twigs | 0.348 ± 0.0083 ns | 0.365 ± 0.0311 | 1107.363 ± 228.1501 * | 0 | 2445.016 ± 118.1414 ** | 16.266 ± 16.2659 |
Synadenium cupulare # | Leaves | 0.010 ± 0.0002 ** | 0.004 ± 0.0004 | 0 ns | 8.561 ± 8.5610 | 20.546 ± 4.2805 ns | 54.362 ± 21.8305 |
Tetradenia riparia δ | Leaves | 0.002 ± 0.0004 ns | 0.005 ± 0.0022 | 0 *** | 14.982 ± 0.4280 | 11.985 ± 1.7122 ns | 22.259 ± 13.6976 |
Trichilia dregeana δ | Leaves & Twigs | 0.198 ± 0.0099 ns | 0.138 ± 0.0148 | 118.998 ± 5.1366 ** | 0 | 442.603 ± 65.0634 * | 13.270 ± 1.2841 |
Ziziphus mucronata # | Leaves | 0.008 ± 0.0000 *** | 0.046 ± 0.0013 | 0 | 0 | 38.953 ± 12.4134 ns | 28.679 ± 1.2842 |
Ziziphus mucronata δ | Leaves | 0.077 ± 0.0003 ** | 0.046 ± 0.0013 | 0 | 0 | 47.085 ± 17.1220 ns | 28.679 ± 1.2842 |