Figure 1.
Figure 2.
Figure 3.
Figure 4.
Survival rates of heat-acclimated strawberry plantlets at different days after lethal heat stress_
| Treatment | 7 days | 14 days | 21 days | 28 days |
|---|---|---|---|---|
| T0 | 100 a | 100 a | 100 a | 100 a |
| T1 | 55 ± 0.31 b | 55 ± 0.10 b | 75 ± 0.36 b | 75 ± 0.36 b |
| T2 | 55 ± 0.10 b | 60 ± 0.00 b | 85 ± 0.36 b | 95 ± 0.32 ab |
| T3 | 70 ± 0.00 b | 85 ± 0.58 ab | 95 ± 0.14 ab | 100 a |
| T4 | 80 ± 0.26 b | 95 ± 0.32 a | 100 a | 100 a |
| TN | 0 c | 0 c | 0 c | 0 c |
Number of new adventitious roots produced by heat-acclimated strawberry plantlets at different days after lethal heat stress_
| Treatment | 7 Days | 14 Days | 21 Days | 28 Days | 35 Days | 42 Days | 49 Days | 56 Days |
|---|---|---|---|---|---|---|---|---|
| T0 | 1.40 ± 0.40 a | 2.70 ± 0.56 a | 4.10 ± 0.72 a | 5.00 ± 0.98 a | 5.70 ± 1.09 a | 6.40 ± 1.28 a | 6.50 ± 1.32 a | 6.80 ± 1.31 a |
| T1 | 0 | 0 | 0.40 ± 0.31 bc | 1.10 ± 0.46 bc | 1.10 ± 0.46 cd | 1.80 ± 0.55 cd | 2.90 ± 0.80 b | 3.10 ± 0.77 b |
| T2 | 0 | 0.30 ± 0.21 bc | 0.60 ± 0.31 bc | 1.40 ± 0.69 bc | 1.50 ± 0.67 cd | 2.10 ± 0.64 c | 2.60 ± 0.82 b | 3.00 ± 0.84 b |
| T3 | 0.40 ± 0.27 b | 0.90 ± 0.28 b | 1.60 ± 0.37 b | 2.60 ± 0.50 b | 3.70 ± 0.50 b | 4.40 ± 0.50 b | 4.70 ± 0.50 ab | 4.80 ± 0.49 ab |
| T4 | 0 | 0.40 ± 0.22 bc | 1.30 ± 0.47 b | 1.80 ± 0.44 bc | 2.90 ± 0.43 bc | 3.20 ± 0.51 bc | 3.80 ± 0.61 b | 3.90 ± 0.60 b |
Number of new leaves produced by heat-acclimated strawberry plantlets at different days after lethal heat stress_
| Treatment | 7 Days | 14 Days | 21 Days | 28 Days | 35 Days | 42 Days | 49 Days | 56 Days |
|---|---|---|---|---|---|---|---|---|
| T0 | 0.80 ± 0.13 a | 1.30 ± 0.21 ab | 2.20 ± 0.20 b | 3.10 ± 0.18 c | 4.20 ± 0.20 b | 5.10 ± 0.23 b | 5.70 ± 0.15 a | 6.00 ± 0.21 a |
| T1 | 0.10 ± 0.10 c | 1.00 ± 0.33 b | 2.10 ± 0.43 b | 3.50 ± 0.45 c | 4.40 ± 0.56 b | 5.00 ± 0.65 b | 5.80 ± 0.74 a | 6.30 ± 0.83 a |
| T2 | 0 | 1.30 ± 0.42 ab | 3.50 ± 0.43 a | 4.80 ± 0.42 a | 6.00 ± 0.54 a | 6.50 ± 0.45 a | 6.60 ± 0.43 a | 6.60 ± 0.43 a |
| T3 | 0.40 ± 0.16 b | 2.10 ± 0.31 a | 3.50 ± 0.40 a | 4.60 ± 0.54 ab | 5.20 ± 0.51 ab | 5.70 ± 0.45 ab | 6.50 ± 0.40 a | 7.40 ± 0.45 a |
| T4 | 0.40 ± 0.16 b | 1.50 ± 0.22 ab | 2.50 ± 0.22 b | 3.70 ± 0.30 bc | 4.60 ± 0.27 b | 5.40 ± 0.27 ab | 6.00 ± 0.26 a | 6.70 ± 0.33 a |
Number of new lateral roots produced by heat-acclimated strawberry plantlets at different days after lethal heat stress_
| Treatment | 7 Days | 14 Days | 21 Days | 28 Days | 35 Days | 42 Days | 49 Days | 56 Days |
|---|---|---|---|---|---|---|---|---|
| T0 | 0 | 0.80 ± 0.51bc | 1.20 ± 0.76 cd | 1.50 ± 0.82 c | 1.50 ± 0.82 c | 1.50 ± 0.82 cd | 1.50 ± 0.82 cd | 1.50 ± 0.82 c |
| Tl | 0 | 0.60 ± 0.50 bc | 1.80 ± 0.94 bcd | 2.40 ± 1.09 bc | 2.40 ± 1.09 bc | 2.90 ± 1.15 bc | 3.50 ± 1.22 bc | 4.60 ± 1.53 b |
| T2 | 0.50 ± 0.50 a | 1.60 ± 1.08 abc | 3.20 ± 1.44 abc | 4.50 ± 1.27 ab | 4.70 ± 1.21 ab | 5.10 ± 1.22 ab | 5.60 ± 1.14 ab | 6.10 ± 1.22 ab |
| T3 | 0 | 2.20 ± 0.66 ab | 4.80 ± 0.76 a | 5.60 ± 0.81 a | 5.70 ± 0.80 a | 6.30 ± 0.78 a | 7.00 ± 0.76 a | 7.20 ± 0.79 ab |
| T4 | 0.20 ± 0.20 a | 3.00 ± 0.67 a | 4.20 ± 0.79 ab | 4.50 ± 0.89 ab | 5.10 ± 0.81 a | 6.50 ± 0.64 a | 7.40 ± 0.52 a | 7.90 ± 0.38 a |
Chlorophylls, electrolyte leakage and free proline content of heat-acclimated strawberry plantlets after lethal heat stress_
| Treatment | Chlorophyll (mg · g-1 FW) | Electrolyte leakage (%) | Proline (mg · g-1 FW) | ||
|---|---|---|---|---|---|
| Total | Ch a | Ch b | |||
| T0 | 3.92 ± 0.02 a | 2.81 ± 0.02 a | 1.11 ± 0.04 a | 10.76 ± 0.04 c | 1.38 ± 0.41 b |
| T3 | 1.81 ± 0.04 b | 1.26 ± 0.02 b | 0.54 ± 0.03 b | 22.46 ± 0.70 b | 3.34 ± 0.13 a |
| TN | 1.11 ± 0.01 c | 0.75 ± 0.01 c | 0.36 ± 0.02 c | 38.26 ± 0.62 a | 1.69 ± 0.09 b |