the chemical profile of essential oils obtained from fennel fruits

FARMACIA, 2010, Vol. 58, 1 51significant increase of the monoterpenes level from 12.55% (2002), 13.96%(2001) to 19.29% (2003). Generally, the decrease of the aromatic fractioncontent was accompanied by an increase in the monoterpene levels.The amount and composition of the oils seem to correlate with themeteorological data. Colder atmospheric and surface soil temperature (figures2, 3) and abundant rainfall (figure 4) at the beginning of the vegetation perioddetermined lower volatile oil yield and higher level of monoterpene for 2003(2%; 19.29%, respectively) compared to 2002 (12.6%; 12.55%) and 2001(11%; 13.96%) years.The effect of the meteorological factors on the oilcomposition is also determined by the plant development phase.Surface soil temperature (Celsius grade)35302520151050MarchAprilMayJuneJulyAugustSeptemberOctober200120022003Figure 2Surface temperature soil (°C) of 2001-2003 years, March-October intervals(monthly average data)Atmospheric temperature (Celsius grade)2520151050MarchAprilMayJuneJulyAugustSeptemberOctober200120022003Figure 3Atmospheric temperature (°C) of 2001-2003 years, March-October intervals(monthly average data)