Allelopathic Effects of Aqueous Extracts of Sorghum (Sorghum bicolor L. Moench) on the Early Seedling Growth of Sesame (Sesamum indicum L.) Varieties and Selected Weeds

Table 9

Effect of different concentrations of sorghum leaf and stem aqueous extracts on PAL, POD, and PPO activity in goose grass.

Extract concentration (%)	Enzyme
	PAL (µg PAL g^−1)	POD (U µl^−1 min^−1)	PPO (U µl^−1 min^−1)
0 (control)	0.959^ab	0.167	0.073
2.5	1.421^b	0.150	0.011
5.0	1.331^b	0.142	0.100
7.5	1.335^b	0.173	0.134
10.0	0.726^a	0.197	0.140
-value	0.042	0.858	0.361
LSD	0.5056	ns	ns
CV (%)	14.1	6.8	4.9
	Extract tissue
Extract tissue	PAL (µg PAL g^−1)	POD (U µl^−1 min^−1)	PPO (U µl^−1 min^−1)
Leaf	1.060	0.125^a	0.104
Stem	1.249	0.203^b	0.119
-value	0.233	0.032	0.526
LSD	ns	0.0705	ns
CV (%)	14.1	6.8	4.9

Means followed by the same letter in the column are not significantly different at .