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Table 3 Yield and chelating activity of T. algeriensis essential oils during the vegetative and the flowering stages. Coding numbers of populations' locations: see Table 1

From: Variation of chemical composition of essential oils in wild populations of Thymus algeriensis Boiss. et Reut., a North African endemic Species

Populations

Vegetative stage

Flowering stage

Student test

 

Yield (ml/100 g)

IC50 (μg/ml)

Yield (ml/100 g)

IC50 (μg/ml)

Y

C

1

2.68 ± 0.58b

180 ± 15d

2.38 ± 0.23b

190 ± 17bc

ns

ns

2

3.66 ± 0.28c

140 ± 15c

3.66 ± 1.0c

130 ± 0.0ab

ns

ns

3

2.70 ± 0.30b

50 ± 5a

2.25 ± 0.01b

240 ± 40c

ns

*

4

1.70 ± 0a

86 ± 5ab

1.44 ± 0.19a

70 ± 20a

ns

ns

5

3.0 ± 0b

80 ± 5a

1.35 ± 0.10a

140 ± 60ab

**

ns

6

1.85 ± 0.22a

120 ± 45bc

1.68 ± 0.10ab

120 ± 80ab

ns

ns

7

1.88 ± 0a

76 ± 5a

1.03 ± 0.06a

68 ± 3a

**

ns

8

1.76 ± 0a

280 ± 40e

1.23 ± 0.44a

100 ± 45a

ns

**

  1. Values represent mean ± standard deviation. Values followed by the same letter under the same row, are not significantly different (p > 0.05). For the same population, Student test was used to compare averages of essential oil yield (Y) and chelating activity (C) between phenological stages and is considered highly significant (**) at 0.001 ≤ P ≤ 0.01, significant (*) at 0.01 ≤ P ≤ 0.05 and not significant (ns) at P > 0.05.