Determining the Impact of the AM-Mycorrhizosphere on “Dwarf” Sunflower Zn Uptake and Soil-Zn Bioavailability
Table 2
Plant growth parameters.
Soil-Zn (mg k DS)
Sphere treatments
Dry mass (g)
Leaves
Shoot height (cm)
Flowers
Shoots
Roots-CC†
Roots-PC‡
Total no.
% Chlorotic
0
Hyphosphere
0.86
1.57 (0.43)
0.77
0
14.5 (1.19)
0.76
16.3
Mycorrhizosphere
1.65
1.98 (0.51)
1.05
0.19
16.25 (0.25)
1.52
18.3
Rhizosphere
1.76
2.01 (0.33)
0.98
0.20
18.5 (2.21)
0.00
23.5
50
Hyphosphere
0.82
1.68 (0.11)
0.89
0
14.3 (0.85)
3.13
17.9
Mycorrhizosphere
1.58
2.15 (0.32)
1.00
0.19
17.0 (1.14)
4.75
21.89
Rhizosphere
1.76
2.24 (0.34)
0.96
0.24
17.5 (2.30)
8.13
23.75
200
Hyphosphere
1.01
1.79 (0.28)
0.68
0
13.8 (0.62)
3.13
16.13
Mycorrhizosphere
1.35
2.23 (0.17)
0.94
0.18
16.5 (0.64)
27.1
19.1
Rhizosphere
1.50
2.08 (0.09)
0.93
0.18
17.0 (2.12)
40.1
22.0
400
Hyphosphere
0.74
1.45 (0.16)
0.61
0
13.5 (1.83)
7.60
15.5
Mycorrhizosphere
1.51
2.06 (0.15)
0.72
0.24
13.8 (1.03)
36.0
17.8
Rhizosphere
1.41
1.76 (0.26)
0.68
0.19
14.5 (0.96)
45.6
21.75
-values and levels of significance
Soil-Zn (Zn)
0.6
1.3
3.63*
0.2
2.0
78.5***
1.4
Sphere treatments (S)
16.4***
0.1
3.33*
37.6***
1.4
63.2***
3.5*
ZnxS
0.7
1.2
0.8
0.9
0.7
18.3***
0.5
Block
1.2
2.0
0.8
0.1
0.5
0.3
1.4
Means and SE (inside parentheses) are shown. Shared letters within each column designate treatments that are not significantly different according to Bonferonni and Scheffé mean comparison tests. †Central Compartment; ‡Peripheral Compartment. “ns” nonsignificant; ; ; .