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Table 1 Ion concentrations of root and shoot of cultivated and weedy rice under salt stress

From: Na+/K+ Balance and Transport Regulatory Mechanisms in Weedy and Cultivated Rice (Oryza sativa L.) Under Salt Stress

Ion

Salt stress (125 mM)

Ion content

Nipponbare *

9311

JYGY-1

JYFN-4

Shoot

Root

Shoot

Root

Shoot

Root

Shoot

Root

Ca2+

Control 7 d**

4.09 ± 0.17b***

1.41 ± 0.04c

4.23 ± 0.16b

1.48 ± 0.1c

3.67 ± 0.07c

0.78 ± 0.11c

4.24 ± 0.21b

0.92 ± 0.03c

NaCl 7 d

4.5 ± 0.16b

1.64 ± 0.02bc

4.38 ± 0.12b

1.75 ± 0.13c

4.34 ± 0.07b

1.36 ± 0.04b

4.57 ± 0.22b

1.08 ± 0.06c

Recovery 7 d

5.36 ± 0.22a

3.3 ± 0.22a

5.29 ± 0.26a

3.66 ± 0.21a

5.32 ± 0.05a

1.99 ± 0.08a

5.09 ± 0.04a

2.22 ± 0.07a

Control 14 d

3.49 ± 0.02c

1.83 ± 0.09b

3.64 ± 0.07c

2.22 ± 0.05b

3.41 ± 0.05c

1.55 ± 0.06b

3.67 ± 0.03c

1.97 ± 0.06b

Mg2+

Control 7 d

7 ± 0.1b

1.36 ± 0.01c

8.65 ± 0.44bc

1.74 ± 0.07b

6.02 ± 0.13c

1.49 ± 0.05b

6.16 ± 0.14b

0.93 ± 0.04c

NaCl 7 d

5.19 ± 0.07c

1.26 ± 0.02c

7.61 ± 0.18c

1.33 ± 0.02c

4.72 ± 0.12d

0.5 ± 0.03c

5.52 ± 0.24b

0.44 ± 0.02d

Recovery 7 d

8.43 ± 0.15a

2.06 ± 0.05a

9.29 ± 0.25ab

1.77 ± 0.01b

7.01 ± 0.06b

1.54 ± 0.03b

8.05 ± 0.09a

1.63 ± 0.01b

Control 14 d

8.77 ± 0.25a

1.8 ± 0.1b

10.04 ± 0.35a

2.14 ± 0.05a

8.03 ± 0.09a

2.3 ± 0.01a

8.3 ± 0.17a

2.2 ± 0.04a

P

Control 7 d

15.34 ± 0.73ab

10.11 ± 0.4b

16.06 ± 0.46a

9.55 ± 0.26b

14.06 ± 0.68a

5.07 ± 0.2c

15.17 ± 0.36a

8.56 ± 0.28bc

NaCl 7 d

13.52 ± 0.67b

12.33 ± 0.25a

13.41 ± 0.33b

13.33 ± 0.79a

12.29 ± 0.56b

9.44 ± 0.17a

14.19 ± 0.09bc

10.4 ± 0.4a

Recovery 7 d

14.07 ± 0.54b

10.13 ± 0.33b

11.22 ± 0.64c

13.07 ± 0.43a

13.26 ± 0.11ab

8.96 ± 0.35a

14.9 ± 0.35ab

9.5 ± 0.23ab

Control 14 d

16.36 ± 0.63a

8.63 ± 0.27c

14.95 ± 0.34a

8.3 ± 0.15b

14.49 ± 0.15a

7.51 ± 0.12b

13.33 ± 0.13c

7.98 ± 0.25c

Fe2+

Control 7 d

0.27 ± 0.01bc

2.24 ± 0.05a

0.26 ± 0.01b

2.62 ± 0.02a

0.27 ± 0a

3.01 ± 0.02a

0.3 ± 0.02bc

2.49 ± 0.16a

NaCl 7 d

0.25 ± 0.01c

1.98 ± 0.08b

0.24 ± 0.01c

2.11 ± 0.02c

0.24 ± 0.01b

1.24 ± 0.04c

0.28 ± 0.01c

1.88 ± 0.03b

Recovery 7 d

0.3 ± 0.02a

2.18 ± 0.04a

0.28 ± 0.02a

2.58 ± 0.06a

0.28 ± 0.01a

1.53 ± 0.06b

0.32 ± 0.01ab

2.12 ± 0.06b

Control 14 d

0.28 ± 0.01ab

1.49 ± 0.01c

0.24 ± 0.01c

2.41 ± 0.02b

0.21 ± 0.01c

1.6 ± 0.03b

0.33 ± 0.01a

1.3 ± 0.01c

Mn2+

Control 7 d

1389 ± 50.54a

142.67 ± 5.81b

938.33 ± 18.7a

137.33 ± 1.33b

816.33 ± 4.1a

68 ± 0a

949.67 ± 68.63a

61.33 ± 4.81a

NaCl 7 d

640 ± 28.57b

54.67 ± 1.33c

750 ± 12.77b

66.67 ± 3.53c

560.67 ± 19.36b

13.33 ± 1.33d

567.33 ± 13.48b

29.33 ± 1.33b

Recovery 7 d

739.33 ± 15.1b

378.67 ± 7.42a

760 ± 17.21b

394.67 ± 12.7a

825.67 ± 17.32a

46.67 ± 2.67b

911.67 ± 12.47a

57.33 ± 1.33a

Control 14 d

740.33 ± 7.8b

60 ± 0c

746.33 ± 10.8b

76 ± 4c

606.33 ± 7.13b

38.67 ± 1.33c

524.67 ± 9.24b

34.67 ± 3.33b

Cu2+

Control 7 d

20.33 ± 1.2a

193.33 ± 7.1ab

23.67 ± 1.67a

253.33 ± 1.3c

22.33 ± 0.88a

193.33 ± 1.3b

19 ± 1.53a

172 ± 2.31c

NaCl 7 d

19.67 ± 1.2a

210.67 ± 9.33a

21.33 ± 0.67a

349.33 ± 10.4a

13.33 ± 0.33b

261.3 ± 6.67a

15.33 ± 0.88b

208 ± 4b

Recovery 7 d

16 ± 0.58b

177.33 ± 9.61b

21 ± 1a

280 ± 8.33b

14.33 ± 0.67b

214.7 ± 10.4b

16.33 ± 0.33ab

230.67 ± 7.42a

Control 14 d

14 ± 0.58b

132 ± 0c

20.33 ± 0.33a

244 ± 4.62c

14.67 ± 0.33b

133.33 ± 4.8c

16 ± 0.58ab

145.33 ± 5.33d

Zn2+

Control 7 d

74.67 ± 2.96a

70.67 ± 8.11b

40.67 ± 1.33c

69.33 ± 7.42b

38.33 ± 0.33c

76 ± 2.31b

56 ± 2c

141.33 ± 5.81b

NaCl 7 d

77.33 ± 0.88a

64 ± 2.31b

54 ± 1.53b

52 ± 4.62b

42.33 ± 0.88b

60 ± 8.33b

66 ± 2.08b

104 ± 6.11c

Recovery 7 d

82.33 ± 6.12a

112 ± 4a

61 ± 1.73a

128 ± 10.07a

60 ± 1.53a

97.33 ± 8.74a

75.67 ± 2.73a

176 ± 6.11a

Control 14 d

57.67 ± 3.28b

82.67 ± 9.61b

42 ± 1.53c

66.67 ± 4.81b

38.33 ± 1.45c

60 ± 2.31b

37.67 ± 0.88d

178.67 ± 3.53a

  1. The samples that seedlings had three fully expanded leaves, were harvested after treated with nutrient solution containing 125 mM NaCl for 1 weeks, and recovered with IRRI nutrient solution for 1 weeks, respectively. The ion content of Ca2+, Mg2+, P and Fe2+ were mg/g, and Mn2+, Cu2+ and Zn2+ were mg/kg, indicated by dry weight
  2. *Nipponbare is a japonica rice cultivar, 9311 an indica rice cultivar, JYGY-1 a salt-tolerant weedy rice genotype, and JYFN-4 a salt-sensitive weedy rice genotype
  3. **Control 7 d and Control 14 d indicate control conditions (no stress). NaCl 7 d indicates salt stress treatment for 7 days. Recovery 7 d indicates that the first salt stress treatment lasted 7 days and then recovery in normal nutrient conditions for 7 days
  4. *** “±” indicate standard error and different letters (a-d) indicate statistically significant differences between treatments the different treatments (P < 0.05 by Duncan’s Multiple Range test)