J. Khorshidi; M.R. Morshedloo; Sh. Moradi
Abstract
Hypericum sp. is one of the most widely used medicinal plants in the world. Both genetic and environmental factors influence the growth and phytochemical properties of the plant. Therefore, in this study, growth characteristics, essential oil content, total phenol and antioxidant potential were evaluated ...
Read More
Hypericum sp. is one of the most widely used medicinal plants in the world. Both genetic and environmental factors influence the growth and phytochemical properties of the plant. Therefore, in this study, growth characteristics, essential oil content, total phenol and antioxidant potential were evaluated in different populations of three Hypericum species (H. scabrum (HS), H. asperulum (HA) and H. vermiculare (HV)). The results indicated that only flowering stem height was affected by species and other measured traits were not affected by species and population. But the interaction between species and population was significant on all measured traits. So that the highest flowering stem length (77.7 cm), flower and leaf weight (42.4 g), stem weight (30.9 g), plant weight (65.6 g), essential oil content (0.43%), total phenol (204.9 mg gallic acid.g-1 dry extract) and antioxidant potential (52.7 µg dry extract.ml-1) belonged to populations No.5 in HA, No.3 in HS, No.4 in HA, No.4 in HA, No.4 in HS, No.6 in HV, and No.5 in HA, respectively. A positive and significant correlation was observed between stem weight, flower and leaf weight and plant weight with mean annual rainfall of the habitat, between essential oil percentage with soil phosphorus and mean annual temperature of the habitat, and between the electrical conductivity of the habitat soil with the antioxidant potential of the extract. There was also a negative correlation between essential oil percentage and soil organic matter of the habitat. Stem weight, flower and leaf weight, and plant weight had the highest variance among populations belonging to the same species and, therefore, were identified as desirable traits for separation of populations. Generally, one population cannot be considered superior to the others because the superior population was different depending on the trait. Therefore, to achieve a superior population, all populations of the three species must be cultivated and compared under the same conditions.
K. Jaimand; M.B. Rezaee; Z. Behrad; M. Mirza; V. Mozaffarian; R. Azady; M. Naderi; M. Golipur; A. Bahmanzadegan; S. Meshkizadeh; Sh. Karimi
Abstract
Hypericum genus is one of the most important medicinal plants in Iran. Currently in Iran, there are 17 herbaceous, perennial and shrub species of Hypericum of which three species are endemic to Iran. This research was aimed to investigate Hypericine content in nine species of Hypericum. For Hypericine ...
Read More
Hypericum genus is one of the most important medicinal plants in Iran. Currently in Iran, there are 17 herbaceous, perennial and shrub species of Hypericum of which three species are endemic to Iran. This research was aimed to investigate Hypericine content in nine species of Hypericum. For Hypericine content 1 gram of plant was extracted in two steps, chloroform extraction then methanol extraction using a Soxhlet device. Hypericin content was measured by HPLC, using the following condition, mobile phase: (methanol 68%, ethyl acetate 20% and sodium hydrosulphate (0.1 M) 12%) and stationary phase C18, and UV detector: set on 590 nm. Generally, no hypericin was detected in different organs of H. androsaemum L. Hypericine content detected in flowers, leaves and stems were: H. apricum Kar. & Kir. (in flowers 0.061% and leaves 0.005%), H.armenum Jaub. & Spach (flower 0.003%), H.asperulum Jaub. & Spach (in flower 0.025%, leaves 0.004% and stems 0.003%), in H.hirsutum L. (flower 0.007%), in H.linarioides Boss. (flower 0.007%), in H.tetrapterum Fries (flowers 0.008%, leaves 0.014%, and stem 0.001%), and H.vermiculare Boiss. & Hausskn. (flowers 0.005%), in H.perforatum L. (flowers 0.124%, leaf 0.028% , stem 0.003).
