Changes in essential oil composition and phenolic fraction in Rosmarinus officinalis L. var. typicus Batt. organs during growth and incidence on the antioxidant activity
作者： Zaouali Yosr , Chograni Hnia , Trimech Rim , Boussaid Mohamed
DOI: 10.1016/J.INDCROP.2012.07.044
关键词:
摘要: Abstract Rosmarinus officinalis var. typicus Batt. essential oils and acetonic extracts were isolated from different organs at growth stages of branches developed after decapitation the main stem apices clonal plants. Oils assessed by GC–MS present in high concentration (1.23 1.43%) leaves being collected during vegetative flowering stages. Significant variations component contents observed according rather to than phenological branches. 1.8-Cineole (35.8%) was constituent leaves, while, β-caryophyllene (16.7%) identified as for stems. Flowers characterized levels caryophyllene oxide (11.9%). The discrepancy could be due, either differential oil accumulation or physiological biochemical interactions within among morphogenesis. Total polyphenols (4.8–37.4%), flavonoids (3.0–28.5%) condensed tannins (0.2–2.4%) all plant parts. total more accumulated (28.6 24.0 mg EAG/g DW) their fruiting stages, suggesting that contribute modification accumulation. amounts stems (14.7–17.5 mg ER/g did not vary significantly course time. level antioxidant activity estimated DPPH FRAP test systems leaf stage. Compared extracts, exhibited lower activity.
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