Table 3 Effects of salt stress on enzyme activities related to carbon metabolism in Tartary buckwheat.

From: Effects of salt stress on root morphology, carbon and nitrogen metabolism, and yield of Tartary buckwheat

Item

Treatment

Seedling stage

Flowering stage

Grain filing stage

Maturate stage

Invertase (mg g−1 h−1)

CK

4.83 ± 0.12b

8.89 ± 0.60b

17.58 ± 1.07b

9.46 ± 0.21b

S2

5.00 ± 0.31a

9.00 ± 0.44a

17.70 ± 1.41a

9.75 ± 0.14a

S4

4.58 ± 0.37c

8.84 ± 0.57c

17.39 ± 0.82c

9.23 ± 0.22c

S6

4.27 ± 0.21d

8.61 ± 0.32d

17.10 ± 1.08d

9.01 ± 0.30d

Amylase (mg g−1 h−1)

CK

1.39 ± 0.09b

2.90 ± 0.09b

6.96 ± 0.18b

2.93 ± 0.12b

S2

1.51 ± 0.10a

3.11 ± 0.10a

7.43 ± 0.28a

3.21 ± 0.19a

S4

1.31 ± 0.08b

2.69 ± 0.18c

6.81 ± 0.20b

2.89 ± 0.22b

S6

1.29 ± 0.11c

2.47 ± 0.13d

6.46 ± 0.37c

2.49 ± 0.18c

Sucrose synthase (SS, mg g−1 h−1)

CK

17.26 ± 1.04b

26.09 ± 1.07b

40.45 ± 1.51b

32.93 ± 2.69b

S2

18.99 ± 1.48a

27.90 ± 1.69a

42.54 ± 2.17a

35.02 ± 1.90a

S4

14.60 ± 1.93c

23.23 ± 1.22c

37.75 ± 2.48c

31.12 ± 1.78c

S6

13.89 ± 0.90d

20.25 ± 1.01d

35.22 ± 2.71d

30.50 ± 1.99c

Sucrose phosphate synthase (SPS, mg g−1 h−1)

CK

12.98 ± 1.03b

21.34 ± 1.77b

34.55 ± 2.53b

28.06 ± 1.81b

S2

15.08 ± 1.06a

23.18 ± 1.81a

37.19 ± 2.62a

30.25 ± 1.65a

S4

9.71 ± 0.11c

19.87 ± 1.61c

32.52 ± 2.54c

26.13 ± 1.42c

S6

8.38 ± 0.29d

15.52 ± 1.32d

30.67 ± 1.98d

24.21 ± 1.39d

  1. Different letters indicate statistical significance at the P < 0.05 level within the same column.
  2. CK, Control (0 g kg−1), S2, Low-salt (2 g kg−1), S4, Medium-salt (4 g kg−1), S6, High-salt (6 g kg−1).
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