Table 1.
Summer statistics on the ascorbic acid concentration and ascorbate oxidase activity of Norway and ash-leaved maples.
| Sampling Site | Ascorbate oxidase activity, unit of activity |
Ascorbic acid concentration, mg per 100 g of leaves |
||||
|---|---|---|---|---|---|---|
| June | July | August | June | July | August | |
| Norway maple | ||||||
| Control | 2.44 ± 0.27 1.83…3.04 |
4.15 ± 0.06 4.01…4.29 |
3.82 ± 0.34 3.09…4.56 |
195.3 ± 8.7 157.7…232.5 |
164.1 ± 5.8 139.2…189.1 |
146.4 ± 2.1 137.4…155.5 |
| Buffer Area | 2.58 ± 0.31 1.90…3.28 |
4.13 ± 0.20 3.68…4.58 |
3.90 ± 0.27 3.31…4.49 |
311.1 ± 16.4 240.4…381.9 |
207.4 ± 19.5 123.3…291.4 |
184.9 ± 5.7 160.4…209.5 |
| Avenue | 3.18 ± 0.26 2.61…3.76 |
4.55 ± 0.24 4.01…5.09 |
3.96 ± 0.24 3.43…4.50 |
357.2 ± 19.1 275.2…439.1 |
186.1 ± 9.7 144.4…227.7 |
146.8 ± 13.2 90.1…203.5 |
| Ash-leaved maple | ||||||
| Control | 2.73 ± 0.36 1.93…3.52 |
4.28 ± 0.06 4.15…4.41 |
3.69 ± 0.30 3.04…4.34 |
318.4 ± 9.0 305.3…331.4 |
257.2 ± 6.1 241.5…272.9 |
177.1 ± 7.1 158.9…195.3 |
| Buffer Area | 2.76 ± 0.36 1.96…3.56 |
4.47 ± 0.11 4.23…4.71 |
4.60 ± 0.08 4.42…4.77 |
349.2 ± 8.9 336.3…372.2 |
252.9 ± 9.3 229.0…276.8 |
185.4 ± 13.8 149.9…220.9 |
| Avenue | 3.25 ± 0.28 2.64…3.87 |
4.73 ± 0.20 4.30…5.16 |
4.62 ± 0.06 4.48…4.76 |
378.9 ± 10.9 351.7…407.2 |
203.7 ± 6.2 187.8…219.6 |
164.9 ± 6.3 148.7…181.1 |