Table 4. Proportion of bacteria isolated from Leptospermum scoparium that showed phosphate solubilizing activity on tricalcium phosphate (TCP) and hydroxyapatite and auxin production activity on Luria Bertani broth with 5mM tryptophan.
| Origin site | Phosphate solubilizing (TCP) | Phosphate solubilizing (HA) | Auxin production | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| - | + | ++ | +++ | - | + | ++ | +++ | - | + | ++ | +++ | |
| Island Hills Station | 41.3 | 46.0 | 11.1 | 1.6 b | 34.9 | 57.2 | 7.9 | 0.0 b | 71.4 | 23.8 | 4.8 | 0.0a |
| Travis Wetland | 18.5 | 22.9 | 35.7 | 22.9 a | 30.0 | 32.9 | 34.2 | 2.9 a | 58.6 | 41.4 | 0.0 | 0.0 a |
| West Coast | 42.4 | 23.7 | 28.8 | 5.1 b | 33.9 | 45.8 | 15.2 | 5.1 ab | 64.4 | 16.9 | 13.6 | 5.1 a |
The different letter on the last column indicates significantly different activity responses among the sites at p ≤0.05 according Mann-Whitney test. For phosphate solubilizing, (-): no clear zone, (+): clear zone less than 5 mm, (++): clear zone 10 mm > x > 5 mm, and (+++): clear zone ≥ 10 mm in diameter; For auxin production, (-): no activity, (+): low activity (slightly pink colour), (++): moderate activity (moderate pink colour), (+++): high activity (intense pink colour).