Diversity and Antimicrobial Activities of Actinobacteria Isolated from Mining Soils in Midelt Region, Morocco
Table 1
Chemical characteristics, bacterial load, and number of Actinobacteria isolates of the soil samples collected from the studied sites.
Ahouli site
Mibladen site
Midelt site
Zaida site
S1
S2
S3
S4
S1
S2
S3
S4
S1
S2
S3
S4
S1
S2
S3
S4
pH
8.26
7.45
8.79
8.05
8.69
7.65
8.20
8.72
7.94
7.28
7.78
7.78
7.76
7.08
7.90
7.95
Cd
3.79
3.89
2.72
3.95
4.74
4.94
4.44
4.30
4.29
4.45
4.18
4.46
4.44
6.73
4.76
4.70
Co
<1
<1
<1
<1
<1
1.75
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
Cr
13.96
13.82
21.41
11.56
13.32
8.20
19.98
16.77
11.30
10.93
11.27
10.55
8.72
8.67
9.23
9.10
Cu
9.51
6.42
22.29
11.31
44.95
251.34
30.75
14.03
<1
<1
<1
<1
<1
36.72
9.89
5.72
Fe
17696
16612
31231
15380
2847.3
873.74
6545.2
10378
8228.8
6379.4
10973
6173.9
8917.1
10754
8715.0
9633.4
Mg
5004.7
5009.4
5000.4
4999.6
4981.9
5004.7
4975.0
5008.4
4955.7
4984.1
4990.7
4982.4
5011.1
5014.5
5019.3
5020.9
Na
506.73
505.48
362.76
334.89
339.26
332.45
441.80
312.39
566.15
360.03
600.84
470.75
1803.6
1902.2
352.43
479.27
Ni
13.09
11.05
39.97
8.29
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
Pb
54.93
47.97
75.52
113.86
3024.7
5562.3
579.25
495.28
7.34
<1
91.21
1.08
634.69
359.80
428.98
131.80
Zn
25.25
24.66
38.06
33.36
16.84
12.77
18.96
17.13
16.73
15.56
24.00
15.37
13.70
25.88
21.47
17.19
OM (%)
2.33
10.84
2.28
1.76
2.48
4.56
3.30
1.89
1.97
5.61
3.59
3.10
2.13
2.4
1.21
0.93
CFU/g
1.6 106
4.8 107
1.47 106
9.6 104
6.78 106
6.07 107
3.59 105
9.9 107
2.57 107
3.18 107
2.48 107
2.28 108
2.12 108
4.74 107
1.77 108
9.2 104
Nb of AI
12
2
23
4
7
5
1
6
16
3
3
3
7
13
24
16
OM: organic matter; CFU: colony-forming unit; Nb of AI: number of Actinobacteria isolates; concentration of metals was expressed in mg/kg of soil; S1, S2, S3, and S4: samples 1, 2, 3, and 4.
