Water Deficit and Seasonality Study on Essential Oil Constituents of Lippia gracilis Schauer Germplasm
Table 2
Chemical composition (%) of the essential oil of L. gracilis genotypes harvested in rainy and dry season.
Compound
RRI
L. gracilis genotypes
LGRA106
LGRA107
LGRA108
LGRA109
LGRA110
LGRA201
LGRA202
Rainy season
-Thujene
924
0.45bA
0.98bA
0.98bA
0.85bA
0.95bA
1.37aA
1.00bA
Myrcene
976
2.74bA
2.65bA
2.05cA
2.06cA
3.10aA
3.20aA
3.02aA
-Terpinene
988
1.00cA
2.28bA
1.79cA
1.82cA
2.27bA
3.01aA
2.23bA
p-Cymene
1016
6.70cA
11.46bA
11.75bA
13.02aA
12.87aA
13.74aA
13.30aA
Limonene
1023
0.36aA
0.38aA
0.38aA
0.21bA
0.37aA
0.44aA
0.41aA
1,8-Cineol
1028
3.92aB
0.61dA
2.10bB
0.0dA
2.50bA
1.50cA
0.72dA
-Terpinene
1031
3.66eA
13.52bA
8.81dA
8.55dA
11.81cA
21.11aA
11.99cA
Linalool
1057
0.41bA
0.80aA
0.44bA
0.79aA
0.54bA
0.72aA
0.73aA
Methyl thymol
1180
8.32aB
4.28dB
5.85bB
4.77cB
4.35dB
0.19eA
5.05cA
Thymol
1195
59.26aB
4.50bA
3.65bA
3.20bA
4.06bA
5.78bA
4.03bA
Carvacrol
1228
0.88dA
43.24bA
47.10aA
48.99aA
48.91aA
35.28cA
47.29aA
-Caryophyllene
1291
8.57aA
6.20bA
3.92aA
7.80aA
4.44aA
6.26bA
3.86aA
-Humulene
1298
0.47cA
0.85bA
1.00aA
0.38dA
0.33dA
0.49cA
0.29dA
Bicyclogermacrene
1432
0.07cA
1.40bA
1.95aA
0.55cA
0.44cA
1.05bA
0.42cA
Spathulenol
1437
0.19dA
0.62bA
1.36aA
0.58bA
0.33dA
0.69bA
0.48bA
Caryophyllene oxide
1454
0.74aB
0.58bA
0.62bA
0.71aA
0.56bA
0.82aA
0.57bA
Monoterpenes
87.70
84.70
84.90
84.26
91.73
86.34
89.77
Sesquiterpenes
10.04
9.65
8.85
10.02
6.10
9.31
5.62
Essential oil content (%)
1.25aA
1.70aA
1.60aB
1.35aB
1.52aB
1.92aA
1.52aB
Essential oil yield (mL·plant−1)
1.67aA
2.27aA
2.13aB
1.80aB
2.03aB
2.57aA
2.03aB
Dry season
-Thujene
924
0.51cA
1.05bA
0.98bA
0.93bA
1.05bA
1.24aA
1.14aA
Myrcene
976
2.25cB
2.46bA
1.80eB
2.00dA
2.67aB
2.74aB
2.51bB
-Terpinene
988
0.91dA
2.39bA
1.89cA
2.08cA
2.27bA
3.02aA
2.30bA
p-Cymene
1016
8.12bA
12.86aA
12.51aA
13.34aA
14.03aA
13.22aA
12.80aA
Limonene
1023
0.38aA
0.36aA
0.46aA
0.21bA
0.37aA
0.48aA
0.39aA
1,8-Cineol
1028
5.03aA
0.52dA
3.03bA
0.0dA
3.13bA
2.02cA
0.33dA
-Terpinene
1031
3.50dA
13.66bA
9.86cA
10.52cA
11.33cA
19.65aA
12.53bA
Linalool
1057
0.36bA
0.55aA
0.23bA
0.59aA
0.48aA
0.53aA
0.59aA
Methyl thymol
1180
10.78aA
5.40bA
6.97bA
5.93bA
6.03bA
0.23cA
6.01bA
Thymol
1195
56.77aA
4.42cA
3.25dA
3.50dA
3.76dA
6.95bA
4.53cA
Carvacrol
1228
0.64dA
43.74bA
44.00bB
48.29aA
45.40bA
36.57cA
44.41bB
-Caryophyllene
1291
7.27aA
4.72bB
3.75cA
5.23bB
3.33cA
5.30bA
4.18cA
-Humulene
1298
0.37bA
0.58bA
0.99aA
0.22bA
0.25bA
0.44bA
0.41bA
Bicyclogermacrene
1432
0.0cA
1.28bA
2.22aA
0.48cA
0.37cA
1.14bA
1.08bA
Spathulenol
1437
0.0cA
0.61bA
1.09aA
0.61bA
0.37cA
0.56bA
0.60bA
Caryophyllene oxide
1454
1.13aA
0.73cA
0.69cA
1.09aA
0.87bA
0.93bA
0.77cA
Monoterpenes
89,25
87,41
84,98
87,39
90,52
86,65
87,54
Sesquiterpenes
8,77
7,92
8,74
7,63
5,19
8,37
7,04
Essential oil content (%)
1.42bA
2.02aA
2.17aA
1.85bA
2.15aA
2.37aA
2.70aA
Essential oil yield (mL·plant−1)
1.90bA
2.70aA
2.90aA
2.47bA
2.87aA
3.17aA
3.60aA
RRI: relative retention index. Different lowercase letters indicate differences within lines (genotypes), and uppercase letters indicate differences between harvest seasons. Values followed by the same letter are not statistically different based on the Scott-Knott test ().