Changes in Eucalyptus camaldulensis essential oil composition as response to drought preconditioning

Figures & data

Table 1. Mean relative abundances of E. camaldulensis essential oil components in control (C) and water-stressed (WS) treatments.

Essential oil	KI	Relative abundance		P	Identification
Major components		Control	Water stress
α-pinene	941	6.99±3.17	12.13±3.62	0.0397	MS, KI, St
β-myrcene	996	1.25±0.06	0.60±0.05	<0.0001	MS, KI
Limonene	1035	9.71±1.49	5.31±0.41	0.0004	MS, KI, St
1,8-cineole	1037	45.76±6.01	58.77±2.71	0.0030	MS, KI, St
γ-terpinene	1064	8.42±2.07	2.07±2.95	0.0051	MS, KI
4-terpineol	1193	2.48±0.48	1.92±1.66	0.4501	MS, KI, St
α-terpineol	1198	4.67±1.08	4.98±0.64	0.5252	MS, KI
globulol	1597	1.45±0.55	3.06±0.62	0.0448	MS, KI, St
Minor components
2-(E)-hexenal	857	0.12±0.04	traces	<0.0001	MS, KI
β-pinene	985	0.72±0.15	0.59±0.01	0.0728	MS, KI, St
α-phellandrene	1015	0.42±0.07	traces	0.0056	MS, KI, St
β-phellandrene	1039	0.36±0.04	0.15±0.02	<0.0001	MS, KI
terpinolene	1092	0.50±0.12	traces	0.0074	MS, KI, St
Linalool	1099	0.17±0.05	0.97±0.12	<0.0001	MS, KI
trans-pinocarveol	1142	0.69±0.12	0.97±0.12	0.0065	MS, KI
2-hidroxycineole-acetate	1362	0.35±0.03	0.47±0.11	0.5327	MS
Aromadendrene	1476	0.60±0.09	0.40±0.06	0.0603	MS, KI
Epiglobulol	1535	0.48±0.05	0.73±0.08	0.1565	MS, KI
ledol	1568	0.42±0.12	0.91±0.12	0.0032	MS, KI
Notes: Relative abundances given as mean value±SD (standard deviation), n=15. Identification by: MS (NIST 98.L data base), KI (literature data), St (authentic reference compounds).

Figure 1.  Changes in E. camaldulensis essential oil major components as response to water stress. 1: α-pinene, 4: β-myrcene, 7: limonene, 9: 1,8-cineole, 10: γ-terpinene, 14: 4-terpineol, 15: α-terpineol, 19: globulol. White bars: control treatment (C), grey bars: water-stressed treatment (WS).

Figure 2.  Changes in E. camaldulensis essential oil minor components as response to water stress. 2: 2-(E)-hexenal, 3: β-pinene, 5: α-phellandrene, 8: β-phellandrene, 11: terpinolene, 12: linalool, 13: trans-pinocarveol, 16: 2-hidroxycineole-acetate, 17: aromadendrene, 18: epiglobulol, 20: ledol. White bars: control treatment (C), grey bars: water-stressed treatment (WS).

Figure 3.  Principal Component Analysis (p<0.05) of E. camaldulensis essential oil components. 1: α-pinene, 4: β-myrcene, 7: limonene, 9: 1,8-cineole, 10: γ-terpinene, 14: 4-terpineol, 19: globulol, 5:α-phellandrene, 8:β-phellandrene, 12: linalool, 13: trans-pinocarveol, 17: aromadendrene, 18: epiglobulol, 20: ledol.

: Control treatment (C),

: Water- stress treatment (WS).

: Non-oxigenated terpenes,

: Oxigenated terpenes