(experiment 2) Sucrose-enhanced recovery of leaf PI, necrosis, and chlorophyll content of containerized holly (Ilex aquifolium L.) placed outdoors with time (weeks) based on quadratic regression analysis after application of salt (NaCl).
| Treatment | PI | Leaf necrosis | Chlorophyll Content | |||
|---|---|---|---|---|---|---|
| Regression: y = a + bT + cT2 | r2 | Regression: y = a + bT + cT2 | r2 | Regression: y = a + bT + cT2 | r2 | |
| 30 g NaCl | y = 1.98 + 1.30T − 0.18T2 | 0.42 | y = 4.50 to 0.11T − 0.01T2 | 0.95 | y = −2.51 + 8.82T − 0.53T2 | 0.93 |
| 60 g NaCl | y = 2.39 + 0.96T − 0.10T2 | 0.84 | y = 4.56 to 0.12T − 0.02T2 | 0.98 | y = −4.10 + 8.60T − 0.40T2 | 0.88 |
| Sucrose 25 g + 30 g NaCl | y = −2.36 + 3.73T − 0.32T2 | 0.91 | y = 4.36 to 0.16T − 0.01T2 | 0.94 | y = −15.15 + 16.75T − 1.08T2 | 0.94 |
| Sucrose 25 g + 60 g NaCl | y = 0.315 + 2.05T − 0.19T2 | 0.90 | y = 4.20 to 0.03T − 0.02T2 | 0.95 | y = 4.70 to 3.91T + 0.15T2 | 0.96 |
| Sucrose 50 g + 30 g NaCl | y = 1.45 + 1.41T − 0.12T2 | 0.88 | y = 3.37 + 0.09T − 0.03T2 | 0.96 | y = −9.96 + 13.49T − 0.81T2 | 0.90 |
| Sucrose 50 g + 60 g NaCl | y = 0.89 + 1.90T − 0.17T2 | 0.96 | y = 4.24 to 0.10T − 0.02T2 | 0.98 | y = −7.40 + 11.67T − 0.66T2 | 0.88 |
y, leaf PI, necrosis, and chlorophyll content value; a, leaf PI, necrosis and chlorophyll content of control value (calculated intercept); b, rate of PI, necrosis, and chlorophyll content with time (T), c, = rate of change. PI and chlorophyll values mean of six trees, five leaves per tree, leaf necrosis values mean of six trees.