Table 3.

Allelopathic effect of the leaf essential oil of Juniperus polycarpos var. turcomanica on germination characteristics of Portulaca oleracea, Amaranthus retroflexus and Datura stramonium

Concentration (µLL−1)	Seed germination (%)	Shoot length (mm)	Radicle length (mm)	Root length/stem length	Fresh weight (g)	Dry weight (g)
Portulaca oleracea
Control (Distilled water)	85.33 ± 6.1 ab	3.5 ± 0.3 a	2.8 ± 0.3 a	1.52 ± 0.09 a	0.076 ± 0.005 a	0.004±0.0 a
Control (Distilled water + Tween)	74.7a ± 2.3 b	2.8 ± 0.4 a	2.3 ± 0.3 a	1.4 ± 0.45 a	0.060 ± 0.002 b	0.0034 ± 0 ab
50	44.0 ± 4.0 c	1.9 b	1.2 ± 0.3 b	0.4 ± 0.04 b	0.043 ± 0.003 c	0.0026 ± 0 bc
100	33.3 ± 2.3 d	1.7 ± 0.5 b	0.8 ± 0.3 b	0.3 ± 0.06 b	0.400 ± 0.001 c	0.0020 ± 0 c
200	0 e	0 c	0 c	0 c	0 d	0 d
400	0 e	0 c	0 c	0 c	0 d	0 d
Amaranthus retroflexus
Control (Distilled water)	85.33 ± 6.11 a	2.9 ± 0.6 a	2.8 ± 0.3 a	1.52 ± 0.06 a	0.076 ± 0.005 a	0.004 ± 0 a
Control (Distilled water + Tween)	74.7 ± 2.3 ab	2.4 ± 0.1 ab	2.3 ± 0.3 ab	1.4 ± 0.45 a	0.060 ± 0.002 b	0.0080 ± 0.1 a
50	61.3 ± 6.1 bc	2.0 ± 0.2 b	1.7 ± 0.2 bc	0.7 ± 0.11 b	0.056 ± 0.0046 bc	0.0036 ± 0 a
100	50.7 ± 4.6 cd	1.97 ± 0.2 b	1.6 ± 0.3 bc	0.7 ± 0.08 b	0.050 ± 0.002 bd	0.0034 ± 0 a
200	40.0 ± 4.0 d	1.87 ± 0.2 b	1.5 ± 0.3 c	0.6 ± 0.08 b	0.047 ± 0.001 cd	0.0027 ± 0 a
400	22.7 ± 6.1 e	1.7 ± 0.5 b	1.2 ± 0.2 c	0.6 ± 0.06 b	0.040 ± 0.003 d	0.0010 ± 0 a
Datura stramonium
Control (Distilled water)	86.67 ± 4.6 a	3.3 ± 0.2 a	2.8 ± 0.3 a	1.52 ± 0.09 a	0.077 ± 0.005 a	0.004 ± 0 a
Control (Distilled water + Tween)	73.3 ± 2.3 ab	3.0 ± 0.2 ab	2.6 ± 0.8 ab	1.4 ± 0.45 ab	0.063 ± 0.002 b	0.0034 ± 0 ab
50	70.7 ± 6.1 ab	2.7 ± 0.1 ab	2.3 ± 0.2 ab	1.1 ± 0.12 ab	0.060 ± 0.001 bc	0.0031 ± 0 bc
100	66.7 ± 4.6 bc	2.3 ± 0.1 bc	2.3 ± 0.3 ab	0.9 ± 0.02 bc	0.060 ± 0.00 bc	0.0025 ± 0 cd
200	52.0 ± 6.9 b	1.9 ± 0.2 c	2.3 ± 0.32 ab	0.7 ± 0.09 c	0.050 ± 0.001 cd	0.0021 ± 0 de
400	33.3 ± 6.1 d	1.7 ± 0.5 c	2.1 ± 0.1 bb	0.6 ± 0.03 c	0.046 ± 0.003 d	0.0015 ± 0 e

^aData are mean ± SD (standard deviation). (n = 4)

^bMeans with different letters in a column are statistically significant at 5% level probability