Table 1.
The radicle and hypocotyl elongation percentages of lettuce seedlings grown on agar gel containing plant materials tested by sandwich method. Overview of top 30 most inhibitory plants.
| Species [Used Part *] | Radicle Elongation (% of Control) | Hypocotyl Elongation (% of Control) | Total Score of * | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 10 mg | Crit. | 50 mg | Crit. | 10 mg | Crit. | 50 mg | Crit. | ||
| Hibiscus sabdariffa L. [C] | 3.2 | ***** | 5.1 | ** | 6.6 | ***** | 3.3 | *** | 15 |
| Prunus dulcis (Mill.) D.A. Webb [S] | 5.7 | **** | 0.0 | *** | 6.7 | ***** | 0.0 | *** | 15 |
| Taraxacum officinale (L.) Weber [S] | 7.1 | **** | 4.0 | ** | 45.5 | *** | 11.9 | *** | 12 |
| Terminalia chebula Retz. [S] | 7.1 | **** | 5.7 | ** | 41.0 | *** | 13.0 | *** | 12 |
| Rhus coriaria L. [Fr] | 7.4 | **** | 3.2 | ** | 33.1 | **** | 10.6 | *** | 13 |
| Prunus mahaleb L. [S] | 7.8 | **** | 3.1 | ** | 11.6 | ***** | 0.0 | *** | 14 |
| Peganum harmala L. [S] | 8.6 | **** | 4.2 | ** | 16.4 | ***** | 4.9 | *** | 14 |
| Punica granatum L. [Fl) | 24.5 | *** | 8.3 | ** | 56.4 | ** | 45.3 | * | 8 |
| Alcea rosea L. [L, Fl] | 27.3 | *** | 16.4 | * | 57.3 | ** | 43.6 | * | 7 |
| Lavandula stoechas L. [L, Fl] | 27.4 | *** | 1.9 | ** | 81.5 | * | 0.5 | *** | 9 |
| Silybum marianum (L.) Gaertn. [S] | 27.7 | *** | 29.9 | 60.8 | ** | 91.0 | 5 | ||
| Nigella sativa L. [S] | 27.8 | *** | 14.0 | ** | 15.1 | ***** | 11.7 | *** | 13 |
| Pinus brutia Tenore [L] | 31.4 | ** | 9.0 | ** | 92.7 | 50.0 | * | 5 | |
| Vitis vinifera L. [L] | 32.9 | ** | 11.7 | ** | 66.6 | ** | 44.5 | * | 7 |
| Liquidambar orientalis L. [G] | 36.0 | ** | 3.8 | ** | 40.7 | *** | 1.2 | *** | 10 |
| Camellia sinensis (L.) Kuntze [L] | 36.2 | ** | 13.5 | ** | 87.9 | 53.6 | * | 5 | |
| Malva sylvestris L. [L, Fl] | 37.0 | ** | 15.4 | * | 83.8 | 63.9 | 3 | ||
| Liquidambar orientalis L [B] | 37.5 | ** | 6.1 | ** | 46.8 | *** | 16.8 | *** | 10 |
| Citrus sinensis (L.) Osbeck [P] | 37.9 | ** | 28.8 | 56.3 | ** | 43.7 | * | 5 | |
| Tribulus terrestis L. [L] | 39.5 | ** | 18.6 | * | 104 | 91.9 | 3 | ||
| Capsella bursa-pastoris (L.) Medik. [L] | 40.7 | ** | 26.5 | * | 82.3 | * | 74.9 | 4 | |
| Papaver rhoeas L. [L] | 41.9 | ** | 28.8 | 128 | 102.3 | 2 | |||
| Raphanus sativus L. [S] | 42.1 | ** | 26.5 | * | 63.5 | ** | 84.1 | 5 | |
| Matricaria chamomilla L. [L, Fl] | 42.3 | ** | 23.0 | * | 109 | 93.6 | 3 | ||
| Capsicum annum L. [Fr] | 44.5 | * | 18.9 | * | 85.9 | 70.5 | 2 | ||
| Corylus avellana L. [L] | 44.5 | * | 44.4 | 83.9 | 90.1 | 1 | |||
| Brassica napobrassica (L.) Mill. [S] | 49.8 | * | 24.7 | * | 65.2 | ** | 41.5 | * | 5 |
| Ocimum basilicum L. [L] | 50.2 | * | 29.7 | 98.3 | 78.3 | 1 | |||
| Valeriana officinalis L. [R] | 50.3 | * | 6.5 | ** | 75.0 | * | 24.7 | ** | 6 |
| Artemisia absinthium L. [L] | 52.1 | * | 37.3 | 102 | 86.3 | 1 | |||
| Mean, M | 69.5 | 42.3 | 99.6 | ||||||
| Standard Deviation, SD | 26.0 | 27.9 | 32.8 | ||||||
| M−0.5 × SD | 56.5 | * | 28.4 | * | 83.2 | * | 57.8 | * | |
| M−1.0 × SD | 43.5 | ** | 14.5 | ** | 66.8 | ** | 38.0 | ** | |
| M−1.5 × SD | 30.5 | *** | 0.6 | *** | 50.4 | *** | 18.2 | *** | |
| M−2.0 × SD | 17.5 | **** | 34.0 | **** | |||||
| M−2.5 × SD | 4.5 | ***** | 17.6 | ***** | |||||
* Abbreviations: B = Bark, C = Calyx, Fl = Flower, Fr = Fruit, G = Gum, L = Leaf, P = Peel, R = Root, S = Seed.