关键词:SA; Cu胁迫; 烟草; 微量元素 Effect of Salicylic Acid on Growth and Nutrient Uptake in Hydroponic Tobacco under Cu Stress XU Gen-Di1,2, GE Shu-Fang1,2, ZAHNG Yi3, WU Yu-Huang4, MEI Xiao-Man5, LIU Peng1,2,* 1 Research Institute of Ecology, Zhejiang Normal University, Jinhua 321004, China
2 Key Laboratory of Botany / Zhejiang Normal University, Jinhua 321004, China
3 Tourism College of Zhejiang, Hanzhou 311231, China
4 College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China
5 College of Teacher Education, Hanzhou Normal University, Hangzhou 330036, China
AbstractA hydroponic experiment was conducted to study the effects from treatmeats including CK ( Cu2+ 0 mg L-1, SA 0 μmol L-1 as control), T1 (Cu2+ 4 mg L-1, SA 0 μmol L-1), T2 (Cu2+ 4 mg L-1, SA 100 μmol L-1), T3 (Cu2+ 4 mg L-1, SA 300 μmol L-1), T4 (Cu2+ 4 mg L-1, SA 500 μmol L-1) on growth characteristics, elements absorption and accumulation in two tobacco cultivars, N. tabacum cv .W38 (Cu resistant genotype) and N. benthamiana (Cu sensitive genotype) under copper stress. The result showed that the growth of two tobacco cultivars under 4 mg L-1Cu stress for 15 days was inhibited to some extent, meanwhile, the content of Cu in their organs was increased while the absorptions of K, Ca, Mg, Fe, Zn, B, and Mn were inhibited. The addition of exogenous SA could alleviate the inhibition of plant height, root length and fresh weight, and reduce Cu content of tobacco, but increase the absorption of nutritional elements K, Ca, Mg, Fe, and Mn. Compared with treatment T1, contents of Cu in root, stem and leaf were increased by 25.05%, 39.78%, 22.91% in N. benthamiana, and by 23.27%, 37.30%, 28.88% in N. tabacum cv. W38, respectively. In conclusion, appropriate concentration of SA promotes the growth and elements absorption in tobacco under copper stress. In this experiment, 300 μmol L-1 SA could significantly alleviate copper inhibition to tobacco.
图2 SA对铜胁迫下烟草株高的影响Fig. 2 Effects of SA on plant height (mean± SE) of tobacco under copper stressBars superscripted by different letters are significantly different at the 5% probability level. Treatment codes are the same as those given in Fig. 1.
图3 SA对铜胁迫下烟草鲜重的影响Fig. 3 Effects of SA on fresh weight (mean± SE) of tobacco under copper stressBars superscripted by different letters are significantly different at the 5% probability level. Treatment codes are the same as those given in Fig. 1.
表1 SA对铜胁迫下烟草Cu含量的影响 Table 1 Effects of SA on the content of Cu (mean± SE) in tobacco under copper stress (μ g g-1DW)
品种 Variety
部位 Part
CK
T1
T2
T3
T4
W38 N. tabacumcv. W38
根Root
20.47± 0.51 e
150.52± 0.44 a
139.11± 0.49 b
115.49± 0.71 d
130.52± 0.67 c
茎Stem
3.11± 0.10 d
20.16± 0.17 a
18.22± 0.18 b
12.64± 0.36 c
17.84± 0.52 b
叶Leaf
8.38± 0.15 d
60.61± 0.62 a
55.84± 0.19 b
43.10± 0.89 c
42.29± 1.24 c
本氏烟 N. benthamiana
根Root
23.27± 0.35 d
172.87± 0.72 a
129.57± 0.55 c
145.14± 0.12 b
144.89± 0.75 b
茎Stem
7.18± 0.15 d
21.26± 0.85 a
16.78± 0.38 c
18.86± 0.17 b
19.65± 0.35 b
叶Leaf
8.47± 0.19 d
81.79± 0.56 a
63.05± 0.18 c
63.24± 0.27 c
65.90± 0.27 b
Values followed by different letters within a row are significantly different at the 0.05 probability level (P< 0.05). Treatment codes are the same as those given in Fig. 1. 同行数据后的不同字母表示在0.05水平上差异显著。处理代码同图1。
表1 SA对铜胁迫下烟草Cu含量的影响 Table 1 Effects of SA on the content of Cu (mean± SE) in tobacco under copper stress (μ g g-1DW)
表2 SA对铜胁迫下烟草K含量的影响 Table 2 Effects of SA on the content of K (mean± SE) in tobacco under copper stress (μ g g-1 DW)
品种 Variety
部位 Part
CK
T1
T2
T3
T4
W38 N. tabacumcv. W38
根Root
15.32± 0.27 a
8.27± 0.07 c
13.55± 0.20 b
15.32± 0.22 a
15.14± 0.11 a
茎Stem
51.23± 0.22 a
38.35± 0.24 c
46.51± 0.24 b
51.44± 0.58 a
50.85± 0.65 a
叶Leaf
30.59± 0.45 a
19.62± 0.51 d
25.52± 0.25 c
28.42± 0.19 b
28.12± 0.19 b
本氏烟 N. benthamiana
根Root
17.37± 0.93 a
8.75± 0.87 c
17.49± 0.75 a
17.58± 1.25 a
13.90± 0.28 b
茎Stem
45.97± 0.27 a
31.00± 0.70 d
38.45± 0.51 b
45.28± 0.36 a
35.32± 0.28 c
叶Leaf
30.03± 0.65 a
19.43± 0.18 d
28.17± 0.18 b
28.42± 0.19 b
25.72± 0.52 c
Values followed by different letters within a row are significantly different at the 0.05 probability level (P< 0.05). Treatment codes are the same as those given in Fig. 1. 同行数据后的不同字母表示在0.05水平上差异显著。处理代码同图1。
表2 SA对铜胁迫下烟草K含量的影响 Table 2 Effects of SA on the content of K (mean± SE) in tobacco under copper stress (μ g g-1 DW)
表3 Table 3 表3(Table 3)
表3 SA对铜胁迫下烟草Ca、Mg含量的影响 Table 3 Effects of SA on contents of Ca and Mg (mean± SE) in tobacco under copper stress (μ g g-1 DW)
微量元素 Trace element
处理 Treatment
W38 N. tabacumcv. W38
本氏烟 N. benthamiana
根Root
茎Stem
叶Leaf
根Root
茎Stem
叶Leaf
Ca
CK
17.19± 0.05 a
20.45± 0.49 a
25.08± 0.39 a
15.36± 0.16 a
22.33± 0.32 a
30.06± 0.19 a
T1
13.01± 0.77 c
16.37± 0.16 d
23.23± 0.38 c
12.30± 0.08 c
18.23± 0.18 d
25.89± 0.39 c
T2
13.36± 0.22 c
17.10± 0.17 c
23.40± 0.23 c
14.38± 0.19 b
20.27± 0.23 b
27.32± 0.07 b
T3
16.12± 0.15 b
19.19± 0.16 b
25.25± 0.17 a
13.91± 0.94 b
19.62± 0.32 c
27.10± 0.32 b
T4
15.77± 0.18 b
17.38± 0.41 c
24.04± 0.38 b
11.44± 0.47 c
18.39± 0.22 d
24.45± 0.52 d
Mg
CK
7.30± 0.26 a
5.230± 0.10 a
3.61± 0.35 a
7.41± 0.35 a
5.26± 0.06 a
3.27± 0.27 a
T1
6.30± 0.02 bc
4.55± 0.20 b
2.34± 0.27 b
6.23± 0.35 c
4.43± 0.28 cd
2.30± 0.30 bc
T2
6.60± 0.25 b
4.48± 0.12 bc
2.62± 0.04 b
6.83± 0.15 b
4.47± 0.14 c
2.72± 0.25 b
T3
6.42± 0.28 bc
4.60± 0.28 b
2.65± 0.82 b
6.52± 0.20 bc
4.83± 0.16 b
2.68± 0.06 b
T4
6.15± 0.15 c
4.21± 0.10 c
2.37± 0.07 b
6.08± 0.21 c
4.14± 0.15 d
2.18± 0.20 c
Values followed by different letters within a row are significantly different at the 0.05 probability level (P< 0.05). Treatment codes are the same as those given in Fig. 1. 同列数据后的不同字母表示在0.05水平上差异显著。处理代码同图1。
表3 SA对铜胁迫下烟草Ca、Mg含量的影响 Table 3 Effects of SA on contents of Ca and Mg (mean± SE) in tobacco under copper stress (μ g g-1 DW)
表4 SA对铜胁迫下烟草Fe、Zn、B、Mn含量的影响 Table 4 Effects of SA on contents of Fe, Zn, B, and Mn (mean± SE) in tobacco under copper stress (μ g g-1 DW)
微量元素 Trace element
处理 Treatment
W38 N. tabacumcv. W38
本氏烟 N. benthamiana
根Root
茎Stem
叶Leaf
根Root
茎Stem
叶Leaf
Fe
CK
524.59± 1.42 a
120.51± 0.44 a
132.85± 0.72 a
510.51± 0.43 a
102.62± 0.40 a
95.52± 0.50 a
T1
410.84± 1.01 e
62.48± 0.46 d
59.58± 0.55 d
333.13± 0.16 e
82.38± 0.67 d
67.31± 0.29 c
T2
494.36± 0.72 c
97.21± 0.20 b
117.22± 0.08 b
474.61± 0.52 c
91.44± 0.45 b
86.26± 0.29 b
T3
499.44± 0.50 b
97.73± 0.63 b
132.14± 1.01 a
492.51± 0.44 b
87.44± 0.50 c
59.90± 0.28 d
T4
444.12± 0.19 d
79.83± 0.18 c
100.41± 0.53 c
379.18± 0.07 d
81.76± 0.19 d
34.62± 0.40 e
Zn
CK
20.28± 0.20 b
13.10± 0.17 a
18.45± 0.06 a
22.83± 0.56 ab
17.26± 0.17 a
20.10± 0.43 ab
T1
19.46± 0.06 c
12.69± 0.50 b
18.07± 0.20 b
21.82± 0.42 b
16.64± 0.40 b
19.19± 0.47 b
T2
19.60± 0.06 c
12.82± 0.17 ab
18.20± 0.10 ab
22.95± 0.80 a
16.72± 0.23 b
19.76± 0.33 ab
T3
21.29± 0.27 a
11.54± 0.23 d
18.20± 0.13 ab
22.19± 0.59 ab
16.42± 0.10 b
20.80± 0.86 a
T4
19.51± 0.16 c
12.06± 0.24 c
17.33± 0.31 c
17.68± 0.30 c
15.10± 0.10 c
17.27± 0.83 c
B
CK
32.47± 0.10 a
17.35± 0.19 a
25.30± 0.05 a
30.13± 0.45 a
19.43± 0.18 a
21.49± 0.20 a
T1
29.73± 0.44 d
15.22± 0.10 c
23.46± 0.22 c
28.66± 0.69 b
17.43± 0.12 c
20.80± 0.39 b
T2
30.82± 0.34 c
16.40± 0.10 b
23.85± 0.23 b
28.75± 0.16 b
17.24± 0.06 c
20.57± 0.21 b
T3
31.69± 0.39 b
16.40± 0.32 b
25.20± 0.16 a
29.76± 0.20 a
18.65± 0.18 b
21.68± 0.34 a
T4
32.04± 0.08 ab
17.28± 0.14 a
25.39± 0.32 a
28.59± 0.08 b
16.38± 0.15 d
19.26± 0.27 c
Mn
CK
624.52± 0.43 a
181.87± 0.57 a
165.35± 0.10 a
611.48± 0.48 a
165.00± 0.61 a
115.24± 0.07 a
T1
354.25± 0.08 d
74.20± 0.22 e
69.73± 0.45 d
401.51± 0.43 d
69.39± 0.78 e
74.16± 0.05 d
T2
580.32± 1.77 b
169.67± 0.34 c
149.90± 0.29 b
584.92± 0.34 c
149.49± 0.45 b
112.27± 0.06 b
T3
581.53± 0.43 b
172.36± 0.16 b
117.78± 0.67 c
587.33± 0.09 b
117.78± 0.67 c
108.32± 0.30 c
T4
427.62± 0.53 c
95.51± 0.15 d
117.31± 0.10 c
401.25± 1.03 d
73.29± 1.01 d
60.74± 0.46 e
Values followed by different letters within a row are significantly different at the 0.05 probability level (P< 0.05). Treatment codes are the same as those given in Fig. 1. 同一元素、同列数据后的不同字母表示在0.05水平上差异显著。处理代码同图1。
表4 SA对铜胁迫下烟草Fe、Zn、B、Mn含量的影响 Table 4 Effects of SA on contents of Fe, Zn, B, and Mn (mean± SE) in tobacco under copper stress (μ g g-1 DW)
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