Table 3 Essential oil composition in two genotypes of Melissa officinalis L. under various light treatments. Data in the table represent means ± SE and different letters indicate a significant difference at the probability level of 0.05 based on LSD test

1,3- octadiene

C8H14

7.6

0.8 ± 0.1^b

-

1.5 ± 0.1^a

1.3 ± 0.1^a

1 ± 0.05^b

1 ± 0.1^b

1.2 ± 0.05^a

1 ± 0.1^b

-

0.7 ± 0.05^c

Alpha-pinene

C10H16

9.8

2.8 ± 0.2^a

2 ± 0.1^c

1.9 ± 0.1^c

2.2 ± 0.2^c

3.1 ± 0.3^a

1.7 ± 0.1^d

2 ± 0.1^c

1.7 ± 0.1^d

2.6 ± 0.1^b

2.4 ± 0.1^b

1,Octen-3-ol

C8H16O

10.5

1.1 ± 0.3^a

1.2 ± 0.2^a

1.1 ± 0.1^a

1.4 ± 0.3^a

0.9 ± 0.1^a

0.8 ± 0.3^a

1.1 ± 0.1^a

0.9 ± 0.05^a

1.1 ± 0.2^a

1.3 ± 0.1^a

Myrcene

C10H16

11

2 ± 0.2^a

0.9 ± 0.1^c

1.1 ± 0.1^c

1.4 ± 0.07^b

1.9 ± 0.1^a

1.3 ± 0.1^b

1.2 ± 0.05^c

1.5 ± 0.05^b

1.8 ± 0.1^a

1.3 ± 0.1^c

γ-3-Carene

C10H16

11.3

6.7 ± 0.2^d

4.9 ± 0.1 ^h

6 ± 0.3^e

8 ± 0.1^b

8.5 ± 0.2^a

7.4 ± 0.1^c

4.5 ± 0.1ⁱ

5.4 ± 0.1 ^g

6.1 ± 0.07^e

5.8 ± 0.2^f

Alpha phellandrene

C10H16

11.8

1.3 ± 0.3^d

2 ± 0.05^b

2.6 ± 0.3^a

2.1 ± 0.1^b

1.9 ± 0.1^b

1.3 ± 0.2^d

2 ± 0.2^b

1.5 ± 0.05^c

1.7 ± 0.3^c

2.1 ± 0.1^b

Para cymene

C10H14

12.2

1 ± 0.05^c

1.5 ± 0.2^b

2 ± 0.05^a

1.6 ± 0.1^b

1.2 ± 0.2^c

1.3 ± 0.3^c

2 ± 0.07^a

1.5 ± 0.2^b

1.7 ± 0.2^b

2.1 ± 0.1^a

Limonene

C10H16

12.6

2.8 ± 0.2^a

2.2 ± 0.2^b

1.9 ± 0.07^c

2.3 ± 0.1^b

3 ± 0.3^a

1.4 ± 0.05^d

1.2 ± 0.07^d

2.1 ± 0.1^b

2.6 ± 0.1^a

2.3 ± 0.05^b

Eucalyptol

C10H18O

12.9

1.7 ± 0.2^c

1.3 ± 0.2^d

2.1 ± 0.1^a

1.7 ± 0.2^c

1.3 ± 0.4^d

2.2 ± 0.07^a

1.2 ± 0.4^d

1.6 ± 0.2^c

2 ± 0.1^a

1.9 ± 0.3^b

1,3,6,-Octatriene

C8H12

13.5

0.9 ± 0.2^e

1.2 ± 0.3^c

1.3 ± 0.1^b

1.4 ± 0.2^b

1.7 ± 0.05^a

1 ± 0.2^d

1 ± 0.3^d

1.3 ± 0.1^b

1.1 ± 0.2^c

0.7 ± 0.1^e

γ-Terpinene

C10H16

14.1

2.5 ± 0.05^a

1.8 ± 0.3^d

2.4 ± 0.1^a

1.5 ± 0.4^e

2 ± 0.2^c

1.4 ± 0.4^e

2.5 ± 0.1^a

2.2 ± 0.2^b

1.9 ± 0.3^d

2.5 ± 0.05^a

Linalool

C10H18O

14.4

6.5 ± 0.2^e

8.9 ± 0.2^a

7.1 ± 0.3^d

5.3 ± 0.2 ^g

4.6 ± 0.3 ^h

6 ± 0.2^f

8 ± 0.4^b

7.4 ± 0.3^c

7.3 ± 0.3^c

4.7 ± 0.4 ^h

Cis-Sabinene

C10H16

14.8

2.3 ± 0.1^a

1.5 ± 0.4^c

2 ± 0.1^a

1.6 ± 0.3^c

1.8 ± 0.3^c

1.9 ± 0.2^b

2 ± 0.2^a

2.3 ± 0.07^a

1.7 ± 0.2^c

2.2 ± 0.1^a

3-methyl-2(methyl-2-2butenyl)

C10H16O2

15.7

0.9 ± 0.2^d

1.2 ± 0.07^c

0.8 ± 0.1^d

1.1 ± 0.05^c

1.5 ± 0.2^c

0.8 ± 0.1^d

0.9 ± 0.2^d

1.1 ± 0.05^c

1.4 ± 0.2^b

2.2 ± 0.2^a

β-Thujone

C10H16O

16.3

2.5 ± 0.2^b

1.7 ± 0.05^e

2.2 ± 0.2^c

1.8 ± 0.2^d

3 ± 0.2^a

1.3 ± 0.3^f

1.3 ± 0.2^f

1.9 ± 0.1^d

2.3 ± 0.3^c

1.8 ± 0.2^d

5-Hepten-1-ol

C7H14O

17.4

1.2 ± 0.1^c

1.3 ± 0.07^c

1.6 ± 0.05b

2 ± 0.05^a

1.8 ± 0.2^a

1.8 ± 0.1^a

0.8 ± 0.07^e

1.2 ± 0.1^c

1 ± 0.1^d

1.4 ± 0.3^b

Bicyclo[2.2.1]heptan-2-one

C7H10O

17.8

1.5 ± 0.2^a

1 ± 0.3^c

1.2 ± 0.1^b

1.4 ± 0.2^a

1.1 ± 0.2^b

1.6 ± 0.2^a

1.1 ± 0.2^b

0.8 ± 0.2^c

0.9 ± 0.1^c

1.1 ± 0.1^b

Isopulegol

C10H18O

18.2

1.9 ± 0.1^c

1.4 ± 0.2^d

2.1 ± 0.2^b

1.5 ± 0.1^d

2.6 ± 0.2^a

2.3 ± 0.3^b

2 ± 0.3^b

1.6 ± 0.1^d

2.1 ± 0.2^b

2.7 ± 0.2^a

Trans-carveol

C10H16O

19.5

7.6 ± 0.2^f

10.2 ± 0.3^b

8.5 ± 0.3^e

6.8 ± 0.2^h

5.7 ± 0.4ⁱ

7.5 ± 0.3^f

11.1 ± 0.3^a

9.4 ± 0.1^c

8.7 ± 0.3^d

7 ± 0.1 ^g

Citronellal

C10H18O

20.1

11.8 ± 0.2^g

15.3 ± 0.2^b

13.4 ± 0.3^e

11.3 ± 0.4^h

10.2 ± 0.4^j

12.7 ± 0.3^f

17.2 ± 0.3^a

14.4 ± 0.4^c

13.7 ± 0.7^d

10.5 ± 0.5^i

Isoborneol

C10H18O

20.4

1.8 ± 0.05^b

1.5 ± 0.1^c

1.1 ± 0.1^d

1.7 ± 0.05^b

2.2 ± 0.2^a

2 ± 0.05^a

1.7 ± 0.1^b

2.1 ± 0.1^a

1.8 ± 0.07^b

2.3 ± 0.1^a

Citronellol

C10H20O

21.8

9.7 ± 0.5^e

7.3 ± 0.4^i

9.1 ± 0.4^f

11.2 ± 0.3^b

11.8 ± 0.2^a

10.3 ± 0.5^d

6.5 ± 0.4^j

8.1 ± 0.3 ^h

8.8 ± 0.3 ^g

11 ± 0.4^c

1,3,8,-Ρ-menthatriene

C10H14

22.4

1.6 ± 0.05^c

1.8 ± 0.1^b

1.4 ± 0.07^d

1.5 ± 0.1^c

1.9 ± 0.1^b

1.3 ± 0.1^e

1.3 ± 0.1^e

2 ± 0.07^a

1.7 ± 0.3^b

2.1 ± 0.07^a

Citral

C10H16O

23.9

6.4 ± 0.4^e

8.2 ± 0.3^b

7.4 ± 0.3^c

5.5 ± 0.07^h

5.7 ± 0.4^g

5.9 ± 0.05^f

9.1 ± 0.5^a

6.9 ± 0.3^d

6.8 ± 0.3^d

5.3 ± 0.1^i

3,6,-Octadienoic acid

C10H16O2

24.2

0.8 ± 0.05^f

0.9 ± 0.05^e

1 ± 0.1^d

1.1 ± 0.1^c

1.2 ± 0.07^b

-

1.1 ± 0.1^b

1.7 ± 0.2^a

1 ± 0.1^d

1.2 ± 0.05^b

Thymol

C10H14O

25.1

2.8 ± 0.1^b

2 ± 0.07^f

2.3 ± 0.1^e

3 ± 0.1^a

2.4 ± 0.1^d

2.6 ± 0.1^c

1 ± 0.1ⁱ

1.7 ± 0.1 ^g

1.2 ± 0.1^h

1.7 ± 0.1 ^g

Carvacrol

C10H14O

25.5

1.4 ± 0.05^f

1.3 ± 0.1^f

1.9 ± 0.2^e

2.2 ± 0.2^c

1.7 ± 0.07^a

2.6 ± 0.1^a

1.9 ± 0.05^e

2.6 ± 0.1^a

2.1 ± 0.07^d

2.3 ± 0.2^b

Carvacrol acetate

C12H16O2

26

2.6 ± 0.2^a

1.8 ± 0.05^c

2.2 ± 0.2^b

2.5 ± 0.2^a

1.3 ± 0.1^e

1.6 ± 0.07^d

2.1 ± 0.3^b

1.9 ± 0.1^c

1.6 ± 0.05^d

2.3 ± 0.1^b

ß-Caryophyllene

C15H24

29.8

1 ± 0.05ⁱ

0.9 ± 0.05^j

1.1 ± 0.07^h

1.8 ± 0.1^d

1.4 ± 0.05^f

1.6 ± 0.1^e

2.1 ± 0.1^b

1.9 ± 0.07^c

1.6 ± 0.05^e

2.3 ± 0.2^a

Caryophyllen epoxide

C15H24O

30.3

1.8 ± 0.1^c

1.9 ± 0.1^c

1.7 ± 0.05^d

1.5 ± 0.1^e

1.2 ± 0.2^f

2.1 ± 0.07^b

1.2 ± 0.2^f

1.7 ± 0.1^d

1.1 ± 0.05^f

2.3 ± 0.1^a

Calamenene

C15H22

30.7

0.9 ± 0.1^f

1.5 ± 0.2^b

1 ± 0.05^e

1.2 ± 0.2^d

1.5 ± 0.2^b

1.4 ± 0.1^c

1.3 ± 0.1^d

1.5 ± 0.2^b

1.2 ± 0.2^d

1.8 ± 0.1^a

α-Humulene

C15H24

31.7

1 ± 0.07^d

1.3 ± 0.1^b

0.9 ± 0.1^e

1.1 ± 0.2^c

0.8 ± 0.05^f

1.5 ± 0.1^a

1.2 ± 0.07^c

1 ± 0.1^d

1.3 ± 0.1^b

0.9 ± 0.05^a

Germacrene-D

C15H24

32.9

1.6 ± 0.2^c

1.5 ± 0.2^c

2 ± 0.07^b

1.7 ± 0.1^c

1.2 ± 0.1^d

2.2 ± 0.05^a

1 ± 0.1^e

1.2 ± 0.1^d

1.5 ± 0.07^c

1.3 ± 0.1^d

ß-Ionone

C13H20O

33.1

1 ± 0.05^c

1.8 ± 0.2^a

1.3 ± 0.2^b

1 ± 0.1^c

0.7 ± 0.05^d

1.4 ± 0.2^b

1.3 ± 0.1^a

1.1 ± 0.05^c

0.8 ± 0.1^d

1 ± 0.2^c

ß-bisabolene

C15H24

34

0.9 ± 0.05^d

1 ± 0.1^c

1.2 ± 0.1^b

1.5 ± 0.07^a

1.2 ± 0.07^b

0.8 ± 0.1^d

1.1 ± 0.07^c

0.9 ± 0.1^d

1 ± 0.05^c

1.4 ± 0.2^a

Eugenol

C10H12O2

35.1

1.1 ± 0.05^b

0.9 ± 0.1^c

-

0.8 ± 0.05^c

1 ± 0.07^b

1.1 ± 0.05^b

0.8 ± 0.1^c

1.2 ± 0.1^a

0.9 ± 0.1^c

1.3 ± 0.07^a

α-Muurolene

C15H24

36.6

0.8 ± 0.1^d

0.8 ± 0.07^d

1 ± 0.1^c

1.1 ± 0.05^c

1.3 ± 0.2^a

1.2 ± 0.1^b

1.2 ± 0.07^b

1.4 ± 0.1^a

1 ± 0.07^c

1.2 ± 0.1^b

ß-Cubebene

C15H24

40.2

1.4 ± 0.07^a

1.4 ± 0.1^a

0.6 ± 0.1^d

1.3 ± 0.1^a

1 ± 0.05^c

1.4 ± 0.1^a

1 ± 0.1^c

1.4 ± 0.05^a

1 ± 0.1^c

1.2 ± 0.07^b

Monoterpenes

____

____

79.7

81.9

80.7

76.7

76.8

76

80.6

80.2

78.8

78.5

Sesquiterpenes

____

____

10.4

11.1

10.8

12.2

10.3

13.6

11.4

10.3

10.5

13.4

Others

____

____

8.3

6.3

8.5

10.5

10.2

8.1

8

9.2

7.4

7.7

The total amount of compounds

98.4

99.3

100

99.4

97.3

97.7

100

99.7

96.5

99.6

Number of compounds

38

37

37

38

38

37

38

38

37

38