جستجوی مقالات مرتبط با کلیدواژه « اندام گیاه » در نشریات گروه « زیست شناسی »

This study is the first to investigate the chemical composition of essential oils in three organs (flower, leaf and stem) of Salvia macrosiphon Boiss., which grows wild and belongs to Lamiaceae family, in Fras procince. In the present experiment, 30 plants in full at flowering stage were randomly prepared from the Jahrom region of Fars province and divided into three groups of 10 and then flowers, leaves, and stems of each group were isolated for testing. Essential oil was extracted from each organ with three replications as in each repetition 200 g of plant material was used by hydro-distillation using Clevenger apparatus and analyzed by a combination of GC-FID and GC-MS techniques to check their chemical variability. The mean yields of essential oil (w/w%) in flowers, leaves, and stems were , 0.48%, 0.28%, and 0.06%, respectively. The total number of compounds identified and quantified were twenty-five in flowers, eighteen in leaves and twenty-one in stems, representing 93.1%, 93.4% and 92.2% of the total oil, respectively. Results of essential oil compound analysis illustrated that flower expressed a high content of linalool. Meanwhile, bicyclogermacrene + (E)-caryophyllene and germacrene D + bicyclogermacrene were the major compounds in leaf and stem organs, respectively. Also, results showed that , in the three studied organs, sesquiterpene hydrocarbons were the common group with the highest amountin leaves (69.1%), stems (68.0%), and flowers (34.5%). The highest level of oxygenated monoterpens was found in the flower part, represented by 27.3% of linalool. In conclusion, the plant organs of S. macrosiphon had different qualities and concentrations of essential oil. Flowers were the most beneficial organ of this species for essential oil and linalool compound productions.

Teucrium polium L. is one of the valuable medicinal plants which belonging to the Lamiaceae family where grows wild from plains and lowlands to mountain heights in throughout Iran. In the present study, 30 plants in full flowering stage were randomly prepared from Jiroft region of Kerman province and divided into three groups of 10 and then flowers, leaves and stems of each group were isolated for testing. Essential oil was extracted from each organ with three replications and in each repetition 200 g of plant material was done by hydro-distillation using Clevenger apparatus and they were analyzed by a combination of GC-FID and GC-MS techniques, to check for chemical variability. The essential oil contents of flower, leaf and stalk were 1.25, 0.93 and 0.14 % (w/w), respectively. The total number of compounds identified and quantified were 59 in flower, 56 in leaf and 61 in stalk. Results of essential oil compound analysis demonstrated that torreyol, α-pinene, β-pinene, β-myrcene, dl-limonene, elemol and caryophyllene were the major compounds in flower and leaf. However, the major compounds of stalk essential oil were torreyol, elemol, agarospirol, caryophyllene, spathulenol and caryophyllene oxide. Results showed that stalk essential oils of the plant characterized with high content of oxygenated sesquiterpenes. Monoterpene hydrocarbons were rich in flower and leaf. The main and common volatile compound identified in the organs of this species was torreyol which was the highest in the essential oil of the stalk and the lowest in the flower. The content of essential oil in the flower was higher than that in the leave and stalk. Chemical variation of the essential oil of T. polium plant parts can be considered by medicinal plants physiologists and breeders and pharmaceutical, food and cosmetic industries for breeding and processing uses.

In the present study, variability in the essential oil content and composition of different plant organs (leaf, flower, stalk and root) of Salvia sahendica were studied. The hydro-distilled essential oils were analyzed by GC-FID and GC-MS to determine their chemical composition. The essential oil content (w/w %) was in the order of: leaf (1.2%)> flower (0.6%)> stalk (0.06%)> root (0.04%). The total number of compounds identified and quantified were 44 in leaf, 46 in flower, 42 in stalk, and 45 in roots, representing 99.6, 99.3, 98.2, and 99.4% of the total essential oil, respectively. β-Pinene (3.5-16.0%), manool (0.0-13.7%), abietatriene (0.0-11.2%), α-pinene (7.2-12.2%), trans-meta-mentha-2,8-diene (1.2-11.1%), linalool acetate (3.2-10.7%), bornyl acetate (2.8-9.4%), bicyclogermacrene (3.6-9.3%) and 1,8-cineol (2.0-8.5%) were the major compounds in all plant organs. Cluster analysis of the essential oil components grouped studied plant organs into two main clusters. Leaf and stalk were divided from the flower into two sub-clusters. Root was indicated in the second main group. Chemical diversity of the essential oil of S. sahendica plant parts can be considered by medicinal plants breeders and pharmaceutical industries for breeding and processing uses.