Water Deficit and Seasonality Study on Essential Oil Constituents of Lippia gracilis Schauer Germplasm

Table 3

Chemical composition (%) of the essential oil of L. gracilis genotypes cultivated with and without irrigation.

Compound	RRI	L. gracilis genotypes
		LGRA106	LGRA107	LGRA108	LGRA109	LGRA110	LGRA201	LGRA202
		With irrigation
-Thujene	924	0.51^cB	1.05^bA	0.97^bA	0.93^bA	1.00^bA	1.24^aA	1.25^aA
Myrcene	976	2.25^bB	2.46^aA	2.00^bA	2.00^bA	2.63^aA	2.74^aA	2.40^aA
-Terpinene	988	0.91^cA	2.39^bA	2.12^bA	2.08^bA	2.24^bA	3.02^aA	2.30^bA
p-Cymene	1016	8.12^bA	12.86^aA	12.08^aA	13.34^aA	14.28^aA	13.22^aA	12.80^aA
Limonene	1023	0.38^bA	0.36^bA	0.42^bA	0.21^cA	0.36^bA	0.48^aA	0.39^bA
1,8-Cineol	1028	5.03^aA	0.52^cA	2.27^bA	0.00^cA	2.65^bA	2.02^bA	0.33^cA
-Terpinene	1031	3.50^cA	13.66^bA	11.54^bA	10.52^bA	11.45^bA	19.55^aA	12.53^bA
Linalool	1057	0.36^bA	0.55^aB	0.28^bA	0.59^aA	0.45^aA	0.56^aA	0.59^aA
Methyl thymol	1180	10.78^aA	5.40^bA	6.18^bA	5.70^bA	5.93^bA	0.23^cA	6.01^bA
Thymol	1195	56.77^aA	4.42^cA	3.89^cA	3.50^cA	3.83^cA	6.95^bA	4.53^cA
Carvacrol	1228	0.64^dA	43.84^bA	43.85^bA	48.29^aB	46.91^aA	36.57^cA	44.41^bA
-Caryophyllene	1291	7.27^aB	4.72^bB	4.22^cA	4.96^bB	3.21^cA	5.30^bB	4.18^cA
-Humulene	1298	0.37^cA	0.58^bB	0.88^aA	0.16^dB	0.24^dA	0.44^cA	0.44^cA
Bicyclogermacrene	1432	0.00^bA	1.28^bA	2.03^aB	0.48^bA	0.24^bA	1.14^aA	1.08^aA
Spathulenol	1437	0.00^cA	0.61^aA	0.84^aB	0.61^aA	0.35^bA	0.56^aB	0.60^aB
Caryophyllene oxide	1454	1.13^aA	0.73^bA	0.62^bA	1.09^aA	0.84^bA	0.93^aA	0.77^bA
Monoterpenes		89.25	87.51	85.60	87.16	91.73	86.58	87.54
Sesquiterpenes		8.77	7.92	8.59	7.30	4.88	8.37	7.07
Essential oil content (%)		1.42^cA	2.02^bA	2.17^bA	1.85^bA	2.15^bA	2.87^aA	2.77^aA
Essential oil yield (mL·plant^−1)		1.90^cA	2.70^bA	2.90^bA	2.46^bA	2.86^bA	3.83^aA	3.70^aA
		Without irrigation
-Thujene	924	0.74^bA	0.97^bA	1.13^aA	0.88^bA	1.01^bA	1.26^aA	1.28^aA
Myrcene	976	2.72^aA	2.13^bB	1.81^cA	1.63^cB	2.46^aA	2.64^aA	2.53^aA
-Terpinene	988	1.06^dA	2.08^bB	1.88^cA	1.67^cB	2.09^bA	3.01^aA	2.12^bA
p-Cymene	1016	7.34^bA	8.95^bB	11.22^aA	10.99^aB	10.78^aB	11.79^aA	11.85^aA
Limonene	1023	0.34^aA	0.26^bA	0.34^aA	0.22^bA	0.29^aA	0.37^aB	0.32^aA
1,8-Cineol	1028	3.25^aB	0.39^dA	1.70^bA	0.00^dA	0.95^cB	0.96^cB	0.19^dA
-Terpinene	1031	4.21^dA	13.08^bA	9.60^cB	8.49^cB	11.31^bA	20.20^aA	11.38^bA
Linalool	1057	0.13^cB	0.78^aA	0.40^bA	0.66^aA	0.44^bA	0.63^aA	0.71^aA
Methyl thymol	1180	10.08^aA	4.07^cB	6.24^bA	5.00^cA	4.40^cB	0.17^dA	5.07^cA
Thymol	1195	53.62^aB	5.03^bA	3.80^bA	3.72^bA	4.82^bA	6.23^bA	4.61^bA
Carvacrol	1228	0.90^dA	45.96^bA	44.98^bA	51.35^aA	52.24^aA	35.16^cA	46.12^bA
-Caryophyllene	1291	11.98^aA	6.29^cA	3.87^dA	6.81^cA	3.94^dA	8.24^bA	5.04^dA
-Humulene	1298	0.61^bA	0.89^aA	1.08^aA	0.44^cA	0.31^cA	0.67^bA	0.40^cA
Bicyclogermacrene	1432	0.00^cA	1.46^bA	3.41^aA	0.91^bA	0.17^cA	1.30^bA	0.90^bA
Spathulenol	1437	0.00^dA	0.72^bA	1.69^aA	0.70^bA	0.34^cA	0.94^bA	0.84^bA
Caryophyllene oxide	1454	0.45^bB	0.51^bB	0.61^bA	0.75^aB	0.57^bB	0.80^aA	0.85^aA
Monoterpenes		84.39	83.70	83.10	84.61	90.79	82.42	86.18
Sesquiterpenes		13.04	9.87	10.66	9.61	5.33	11.95	8.03
Essential oil content (%)		1.60^cA	2.32^bA	2.25^bA	2.00^bA	1.95^cA	3.00^aA	2.45^bA
Essential oil yield (mL·plant^−1)		2.01^cA	3.10^bA	3.00^bA	2.66^cA	2.60^cA	4.00^aA	3.20^bA

RRI: relative retention index. Different lowercase letters indicate differences within lines (genotypes), and uppercase letters indicate differences between treatments with and without irrigation. Values followed by the same letter are not statistically different based on the Scott-Knott test ().