Determining the Impact of the AM-Mycorrhizosphere on “Dwarf” Sunflower Zn Uptake and Soil-Zn Bioavailability
Table 3
AM root colonization.
Soil-Zn (mg k DS)
Sphere treatments
Fungal structures
Hyphae
Vesicles
Arbuscules
% Frequency
% Root length
% Frequency
% Root Length
% Frequency
% Root length
0
Hyphosphere
28.5 (1.7)
50.5
21.0 (3.1)
36.5 (8.8)
21.5 (2.9)
26.0
Mycorrhizosphere
29.0 (6.2)
57.5
25.5 (7.3)
29.0 (3.3)
17.5 (3.2)
30.0
50
Hyphosphere
34.0 (8.6)
56.3
22.0 (2.6)
27.5 (6.3)
27.5 (3.3)
32.5
Mycorrhizosphere
26.5 (5.6)
30.0
23.5 (3.0)
30.0 (4.1)
13.8 (4.4)
25.0
200
Hyphosphere
22.0 (5.2)
29.5
19.5 (5.6)
29.5 (5.0)
20.5 (5.1)
28.5
Mycorrhizosphere
32.5 (3.8)
21.5
9.5 (3.4)
21.5 (6.5)
18.5 (3.0)
16.3
400
Hyphosphere
30.5 (7.7)
35.0
22.5 (4.6)
35.0 (6.5)
19.5 (3.9)
25.0
Mycorrhizosphere
33.5 (5.2)
30.5
17.5 (4.9)
20.5 (3.9)
24.5 (5.7)
31.3
-values and levels of significance
Soil-Zn (Zn)
Sphere Treatments (S)
ZnxS
3.16*
3.47*
Block
1.63
3.99*
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. “ns” nonsignificant; .