Showing 6 results for Essential Oil Yield
Ali Porghalandar, Heidar Meftahizade, Mohammad Reza Kudori,
Volume 11, Issue 47 (1-2023)
Abstract
In order to investigate the effect of organic fertilizers including compost and manure on morphological, yield and qualitative characteristics of Rosa damascena Mill, an experiment was conducted in a complete randomized block design with 7 treatments in 3 replications in Sirjan city in 2018-2019. The treatments included compost (20, 25 and 30 tons per hectare) and manure (10, 15 and 20 tons per hectare) along with the control (without fertilizer application). Results showed that fertilizer in all of the investigated characteristics was significant. Mean comparison of data showed that 20 tons / hectare manure responded better regarding to canopy, height, leaf length and width, fresh and dry weight of flowers, number of flowers, phenol, chlorophyll, and antioxidant. On the other hand, 30 tons / ha compost showed maximum in number of branches, leaves per plant, fresh and dry weight per plant and essential oil yield. Also, cluster analysis showed that 20 and 30 tons / hectare manure and compost were put in the same group. Based on the results, 20 and 30 tons / hectare manure and compost, respectively, had the maximum effect on morphological and qualitative characteristics of Rosa damascena Mill seedlings.
Ardavan Bakhshi Ganjeh, Mohammad Mehdi Rahimi, Abdolsamad Kelidari,
Volume 11, Issue 50 (12-2022)
Abstract
In order to investigate the effects of salicylic acid and cycocel under drought stress conditions on agronomic and biochemical properties and essential oil of lemon balm, an experiment as a factorial split-plot in a randomized complete block design with three replications was carried out in northwest of Yasuj province during 2019 and 2020. Drought stress as the main factor included 35% (control), 70% and 90% field capacity, and the subplots included cycocel (0 and 1000 μM) and salicylic acid (0 and 1 μM). Results showed that foliar application of salicylic acid and cycocel had significant effect on grain yield, essential oil percentage, plant height, fresh and dry weight of shoot and fresh and dry weight of root and the amount of catalase, peroxidase and malondialdehyde enzymes. The highest yield belonged to irrigation treatment after application of 35% moisture along with foliar application with cyclocel and salicylic acid. Also, the most of essential oil yield belonged to irrigation treatment after consuming 70% moisture along with foliar application with cyclocel and salicylic acid. In general, the results showed that foliar application of salicylic acid and cyclocel caused drought resistance in lemon balm, and therefore it is recommended for areas similar to the climatic conditions of the study.
Pooya Arvin, Rana Firouzeh,
Volume 11, Issue 52 (3-2023)
Abstract
To evaluate the biological potential and medicinal properties, the biochemical compositions and quantity and quality of essential oil of Marrubium vulgare L., grown in the natural habitat located in Guynik region, North Khorasan province, were investigated. The content of secondary metabolites including phenol and flavonoids, and antioxidant capacity were measured in laboratory methods. Essential oil of plant was obtained by hydro distillation method and dehydrated with anhydrous sodium sulfate, then it was quantitatively and qualitatively analyzed by gas chromatography (GC) and gas chromatography / mass spectrometry (GC/MS). The results showed that the essential oil yield was 0.24% (w/w), and oxygenated monoterpenes made up 52.40% of essential oil. Also, 18 compounds were identified in the essential oil of M. vulgare plant that the main compounds were dodecanal (23.02%), ß-bisabolene (15.65%) and thymol (9.60%). In this study, the phenol content of extract of M. vulgare was 72.01 (mg Gallic acid/g Dry weight), the flavonoids content was 6.25 (mg Quercetin/g Dry weight) and its antioxidant capacity was 81.12 (μg/ml). Overall, based on the results, it seems that M. vulgare grown in Guinik region can be a potential and rich source of natural antioxidant compounds.
Ali Kazempour, Younes Sharghi, Sayed Ali Mohammad Modarres Sanavi, Hossein Zahedi, Fatme Sefid Kon,
Volume 12, Issue 53 (5-2023)
Abstract
In order to study foliar application of amino acids on morphophysiological properties and thyme essential oil under different irrigation regimes, an experiment was conducted as a split plot based on a randomized complete block design with three replications in the Research Farm of Tarbiat Modares University Faculty of Agriculture in the year 2020 crop season. Experimental factors were irrigation regimes at three levels including normal irrigation, moderate water stress, severe water stress (withholding irrigation until 25%, 45% and 65% of soil available water depletion in the root zone respectively and then irrigation up to field capacity from plant establishment to harvest time), were randomized to the main plot units and spraying at 6 kinds (aspartic acid, tyrosine, proline, commercial amino acids, distilled water and without spraying) were located in subplot units. The results showed that with reduction of irrigation to the level of severe water stress, plant height, fresh and dry weight of leaves, leaf area, total chlorophyll, percentage of essential oil decreased, and glycol peroxidase and proline showed a significant increase compared to optimal irrigation. Catalase activity also increased under moderate water stress and decreased under severe water stress. Foliar application of amino acids had a positive additive effect on the studied traits. The highest essential oil yield (about 11.20 kg/ha) was assigned to plants under commercial and proline amino acid foliar application under full irrigation conditions. Based on the general results of proline foliar application, increasing the concentration of osmolites such as proline under water stress conditions was able to help the plant withstand drought stress by helping to maintain osmotic pressure and compensate for part of the reduction in growth and dry weight. Therefore, consumption of this type of amino acid under stress conditions is recommended to reduce the effects of drought stress. Under non-stress conditions, foliar application of this type of amino acid had the greatest effect on plant growth and yield.
Pooya Arvin, Rana Firouzeh,
Volume 12, Issue 53 (5-2023)
Abstract
Dracocephalum kotschyi Boiss. it is one of the medicinal and aromatic plants that can be found in natural habitats in mountainous and high areas of the country. This plant is very popular because of its large amounts of essential oil and important medicinal properties. In this study, in order to investigate the effect of the habitat on the physiological traits, yield and essential oil content, random sampling of the flowering branches of the plant in the full flowering stage with three replications was done from its natural habitats located in the altitudes of Espidan, Akher Dagh and Arkan in North Khorasan province. The results showed that the plants grown in Espidan region with 15.76 g F.W and 3.24 g D.W are the highest, and the plants of Akher dagh region with 12.58 g F.W and 2.68 g D.W, are the lowest in fresh and dry weight. In terms of the content of flavonoid compounds and the percentage of essential oil yield, the highest amount of these compounds was obtained from 69.63 (mg Q/g D.W) and 1.52% from the plants of Arkan heights. Further, the results showed that 23 compounds were identified in the essential oil of plants of three habitats, and the compounds of cis-α-Bergamotene, limonene and ß-ocimene were the main common compounds in the essential oils of three regions. In connection with the antioxidant property, the plants of Arkan area showed a higher antioxidant capacity than other habitats in inhibiting DPPH free radicals with 50.89 μg/ml. In terms of anthocyanin content, extract of Arkan plants with 2.96 mg of cyanidin 3-glucoside/g was a greater source of anthocyanin, with a significant difference compared to other plants. General conclusion: The plants grown in the altitudes of Arkan showed more content of anthocyanin, flavonoid compounds, antioxidant capacity and essential oil yield than other habitats, and it seems that the Arkan habitat has the most suitable conditions for the cultivation of this valuable medicinal plant.
Maryam Karimi Sernawi, Abdolhossein Rezaei Nejad, Sadegh Mousavi-Fard, Hossein Mirzai Najafgholi, Farhad Beiranvand,
Volume 13, Issue 63 (12-2024)
Abstract
In order to evaluate the reaction of the peppermint plant (Mentha piperita L.) to water deficit stress and the use of growth-promoting bacteria, a factorial experiment was conducted in the form of a completely randomized design with four replications in the research greenhouses of the Faculty of Agriculture of Lorestan University in 2022. The first factor included water deficit stress (80, 50, and 20% available water content (AWC)), and the second factor included growth-promoting bacteria (without the use of bacteria (control), Pseudomonas putida strain, and Curtobacterium sp. strain wlu). The results of the present experiment show the water deficit stress had a significant effect on the morphophysiological and biochemical indicators, so that at the level of 20% AWC, it increased electrolyte leakage (219%), malondialdehyde concentration (50%) and the activity of antioxidant enzymes such as catalase (1174%), peroxidase (308%) and ascorbate peroxidase (82.7%) compared to the control treatment, but growth components such as plant height, stem number, total fresh and dry weight (29.3%, 37.2%, 56.1% and 55.5%, respectively), relative leaf water content (36.1%), essential oil percentage and yield (38.8% and 71.6%, respectively) decreased compared to the control treatment. Photosynthesis rate, intracellular carbon dioxide concentration, stomatal conductance, and mesophyllic conductance also decreased by 76.5%, 61.8%, 40%, and 38.5%, respectively, under water deficit stress conditions of 20% AWC. The application of growth-promoting bacteria in stress and non-stress conditions improved the growth components by increasing water absorption through root growth, increasing the activity of antioxidant enzymes, and increasing the rate of photosynthesis and stomatal conductance. Also, the percentage of essential oil and the yield of essential oil increased under the influence of the use of growth-promoting bacteria. In general, the results showed that the treatment of growth-promoting bacteria, especially the Pseudomonas putida strain, improved the water balance through increasing water absorption, increased biomass due to increasing the rate of photosynthesis, and also increased the activity of antioxidant enzymes to reduce the negative effects of water deficit stress in peppermint.
