NaCl salinity and Zn foliar application influence essential oil composition of basil (Ocimum basilicum L.) | Koncentracija NaCl v hidroponski raztopini in foliarni nanos raztopine cinka vplivajo na sestavo eteričnih olj pri baziliki (Ocimum basilicum L.)

Inglés. Essential oils composition of hydroponically grown Ocimum basilicum L. plant was evaluated in response to salinity (control and 50 mM NaCl) and Zn foliar application (control, 100 and 200 mg l-1). Essential oil constituents were quantified and identified by GC/EI-MS. In total, fifty seven components were identified in the six treatment combinations. Methyl chavicol (43.9–61.2 %) and linalool (11.4-16%) were the major components of all treatments. Salinity had deteriorative effect on methyl chavicol biosynthesis and accumulation. In contrast, integrated levels of salinity and 200 mgl-1 Zn had increment effects on linalool content. Germacrene D (2.2-3.9 %), 1,8-cineole (2.4-3.8 %), (Z)-α-bergamotene (0.1-2.6 %), (E)-β-farnesene (1.4-2.6 %), α-bulnesene (0.9-2.4 %), camphor (0.7-1.3 %) and  (E)-β-ocimene (0.2-1.3 %) were the other main common constituents of oil. Considering the constant levels of zinc foliar application, salinity had raising effects on the contents of most above mentioned constituents. In conclusion, it seems that moderate salinity stress along with balanced levels of Zn foliar application changed the primary metabolites pathways in favor of major volatile oil components biosynthesis and that basil plant has the production potential under prevalent semi-saline conditions.

Esloveno. Raziskana je bila sestava eteričnih olj hidroponsko gojene bazilike (Ocimum basilicum L.), glede na vpliv slanosti (kontrola in 50 mM NaCl) ter foliarnega nanašanja cinka (Zn) (kontrola ter 100 oziroma 200 mg l-1). Sestava eteričnih olj je bila ugotovljena z GC/EI-MS tehniko. Pri šestih kombinacija tretiranja je bilo ugotovljenih 57 sestavin.  Metil kavikol (43,9–61,2 %) in linalool (11,4-16%) sta bili glavni sestavini pri vseh tretiranjih. Sol je negativno vplivala na sintezo in akumulacijo kavikola. Nasprotno, skupen vpliv solne raztopine in višje koncentracije  cinka je povzročil povečanje vsebnosti linaloola. Germakren D (2,2-3,9 %), 1,8-kineol (2,4-3,8 %), (Z)-α-bergamoten (0,1-2,6 %), (E)-β-farnesen (1,4-2,6 %), α-bulnesen (0,9-2,4 %), kafra (0,7-1,3 %) in  (E)-β-ocimen (0,2-1,3 %) so tudi bile glavne sestavine olja. Pri nespremenjeni koncentraciji cinka pri foliarni aplikaciji je sol vplivala na povečano koncetracijo omenjenih metabolitov. Zmerna slanost skupaj s foliarnim tretiranjem z raztopino cinka vpliva na spremenjeno sestavo metabolitov s tem da poveča biosintezo hlapnih sestavin olj; tako je ugotovljena prednost pridelovanja bazilike v razmerah zmerne slanosti.