Table 1 Mitigation effect of thermopriming and α-tocopherol on the absolute growth rate, leaf area index, root shoot ratio, percent moisture content, emergence index, coefficient of the velocity of germination, final germination percentage,and mean germination time of B. napus under mercuric chloride stress

Control

763 ± 126^b

1115 ± 316^bc

5.67 ± 0.16^abc

35.58 ± 6.38^bc

84.00 ± 8.6^abc

18.53 ± 1.61^a

5.85 ± 0.31^a

2.38 ± 0.4^a

Hg4ppm

545 ± 58^c

606 ± 163^d

5.78 ± 0.26^ab

24.34 ± 2.40^c

65.33 ± 11.4^de

10.13 ± 1.27^e

5.78 ± 0.26^ab

2.28 ± 0.5^ab

Hg8ppm

568 ± 69^bc

613 ± 144^d

5.57 ± 0.09^abc

25.40 ± 3.03^bc

62.67 ± 7.5^e

13.90 ± 2.09^bc

5.67 ± 0.09^abc

2.13 ± 0.2^ab

Hg4ppm + 4 °C

591 ± 128^bc

718 ± 193 ^cd

5.85 ± 0.31^a

26.52 ± 7.73^bc

70.67 ± 8.2^cde

11.03 ± 1.75^cde

5.67 ± 0.16^abc

1.93 ± 0.1^ab

Hg4ppm + 4 °C + tocopherol (150 m/L)

728 ± 118^bc

933 ± 202 ^cd

5.55 ± 0.21^abcd

34.31 ± 6.91^bc

76.00 ± 5.6^bcde

12.93 ± 1.65^cde

5.55 ± 0.21^abcd

2.39 ± 0.7^a

Hg4ppm + 50 °C

1042 ± 122^a

1900 ± 265^a

5.52 ± 0.19^abcd

48.83 ± 6.97^a

98.67 ± 1.8^a

10.33 ± 1.22^de

5.52 ± 0.19^abcd

2.07 ± 0.9^ab

Hg4ppm + 50 °C + tocopherol(150 mg/L)

1080 ± 67^a

1888 ± 229^a

5.36 ± 0.01 ^cd

51.52 ± 2.99^a

96.00 ± 3.2^a

18.73 ± 1.14^a

5.36 ± 0.01^dc

1.98 ± 0.5^ab

Hg8ppm + 4c

619 ± 40^bc

723 ± 117 ^cd

5.66 ± 0.07^abcd

28.70 ± 1.16^bc

69.33 ± 6.8^cde

11.27 ± 0.87^cde

5.66 ± 0.07^abcd

2.04 ± 0.1^ab

Hg8ppm + 4 °C + tocopherol(150 mg/L)

761 ± 72^b

1021 ± 192 ^cd

5.52 ± 0.08^abcd

36.00 ± 3.48^b

80.00 ± 8.6^bcd

13.53 ± 1.29 ^cd

5.52 ± 0.08^abcd

1.95 ± 0.6^ab

Hg8ppm + 50 °C

986 ± 109^a

1532 ± 274^ab

5.31 ± 0.10^bcd

47.56 ± 5.57^a

84.00 ± 6.5^abc

16.93 ± 1.68^ab

5.31 ± 0.10 ^cd

2.03 ± 0.2^ab

Hg8ppm + 50 °C + tocopherol150mg/L)

1006 ± 137^a

1695 ± 362^a

5.43 ± 0.13 ^cd

47.96 ± 7.76^a

90.67 ± 6.8^ab

17.60 ± 2.06^a

5.43 ± 0.13^bcd

1.22 ± 0.7^b