Phytotoxic Activity of Ocimum tenuiflorum Extracts on Germination and Seedling Growth of Different Plant Species
Table 2
(a) Effects of aqueous methanol extracts of O. tenuiflorum on and SE of different plant species at four different concentrations. (b) Effects of aqueous methanol extracts of O. tenuiflorum on SVI and GE of different plant species at four different concentrations.
(a)
Test species
Time required for 50% germination ()
Speed of emergence (SE)
Control
3
10
30
100
Control
3
10
30
100
mg dry weight equivalent extract mL−1
mg dry weight equivalent extract mL−1
Cress
−2.3
−1.0
−2.7
1.8
2.4
74.8
66.7
76.7
31.9
4.2
Lettuce
0.0
−3.7
−3.7
−7.3
2.1
100.0
96.7
96.7
93.3
20.0
Alfalfa
−2.3
−2.0
−0.7
0.5
2.2
86.7
74.7
80.0
53.3
16.7
Italian ryegrass
1.3
2.0
1.9
2.1
2.7
15.28
13.70
10.00
14.44
0.00
Barnyard grass
2.3
2.3
2.3
2.4
1.6
14.48
25.26
19.91
18.33
26.98
Timothy
1.6
1.6
2.5
2.5
3.1
36.11
26.67
4.76
6.67
0.00
Statistical analysis
-value
**
NS
NS
*
NS
***
***
***
***
*
CV (%)
1493.11
−2079.32
−5526.66
827.16
31.63
17.60
28.72
21.51
32.37
78.01
0.75
0.59
0.62
0.73
0.50
0.96
0.89
0.96
0.92
0.76
MSD
4.00
7.86
7.8367
8.21
2.12
27.23
41.23
29.27
33.34
25.00
(b)
Test species
Seedling vigour index (SVI)
Germination energy (GE)
Control
3
10
30
100
Control
3
10
30
100
mg dry weight equivalent extract mL−1
mg dry weight equivalent extract mL−1
Cress
40.2
46.2
50.8
31.0
7.8
7.0
6.7
7.7
2.3
0.3
Lettuce
37.2
36.4
33.8
34.4
28.0
10.0
9.7
9.7
9.3
2.0
Alfalfa
39.3
24.9
35.2
35.3
25.4
8.7
6.0
7.3
5.3
1.7
Italian ryegrass
24.3
28.2
22.0
24.8
3.9
1.33
1.33
1.00
1.33
0.00
Barnyard grass
18.9
24.3
24.6
22.7
23.1
1.00
2.00
1.67
1.67
2.33
Timothy
1.3
1.5
1.5
0.9
0.1
2.00
1.33
0.33
0.33
0.00
Statistical analysis
-value
***
***
***
**
***
***
***
***
***
*
CV (%)
17.34
22.35
19.02
32.68
39.75
16.73
22.95
13.52
26.76
80.51
0.94
0.91
0.94
0.82
0.87
0.97
0.94
0.99
0.96
0.75
MSD
13.22
17.06
15.09
23.03
16.58
2.37
2.93
1.77
2.57
2.41
Note: Asterisks indicate a significant difference between control and treatment . and .
