جستجوی مقالات مرتبط با کلیدواژه "سیترونلول" در نشریات گروه "زیست شناسی"

Biological and chemical fertilizers have important effects on the growth and development of plants and consumption of these fertilizers has increased quantitative and qualitative production in plants. In this study, the effects of biological fertilizers such as Botamisol, Humic acid, horse manure, sheep manure, cow manure, poultry manure, vermicompost and complete chemical NPK with two controls (water foliar application and without any foliar application) and three levels of drought stress (field capacity, 50% and 75% loss of gravitational water) on morpho-physiological characters and the content/composition of the essential oil of Rosa damascenawere investigated. This research was performed in a randomized complete block design in a factorial layout with three replications. From thirteen essential oil components, the most components were Citronellol, Geraniol (alcoholic oxygenated monoterpenoides), Heneicosane and Nonadecane (alkane hydrocarbons). Heneicosane (33.6 % and 34.6 %) had the highest amounts of essential oil components. Treatments of poultry manure, vermicompost or complete chemicals in field capacity conditions increased the height of the plant (214.4 cm and 212.1 cm), number of stems (23.1 and 22.2), total chlorophyll (18.3 and 18.1 mg.Kg FW-1), R.W.C (68.4 and 69.5), petal yield (7651.5 and 7591.2 Kg.ha-1) and content of essential oil (0.076 and 0.069%). Suggest to obtain the highest quality of essential oil in damask rose, such as important components (Citronellol, Geraniol) in the same condition, using poultry manure and complete chemical fertilizers.

Colocynth with the scientific name of Citrullus colocynthis L. is one of the plants that it's anti–oxidant and anti–diabetic effects has been shown in previous research. In this study, in addition to the phytochemical study of hydro–alcoholic extract of Colocynth, its anti–oxidant and inhibitory effects on the production of amyloid nanobiofibrils from bovine serum albumin as a model protein have been investigated. The fruit of the plant was collected from the desert areas around Qom in the fall of 2017, dried and then extracted by maaceration method. Analysis of secondary compounds of the extract was performed by gas chromatography-mass spectrometry and the amount of its most important compounds including citrulline and citronellol was obtained by HPLC. The antioxidant activity of the extract was evaluated using DPPH method and then the amyloid fibrils were prepared in the test tube at high temperature and low pH and electron microscope imaging was used to confirm the presence of the fibrils. Congored spectroscopy was used to investigate the inhibitory effects on the production of amyloid fibrils. The results showed that methyl beta-galactopyranoside and beta-diglucopyranoside with 29.51% and 6.31% respectively, were the most abundant chemical compounds and tetradcanoic acid with 16.31% and then octa and hexadecanoic acid with respectively 14.11% and 10.94% were the most compounds found in the extract. The levels of citrulline and citronellol in the extract were 0.0041 and 0.013 mg, respectively. The highest anti–oxidant activity was in the concentration of 10 mg/ml of the extract with 71.5% and the highest inhibition of production of amyloid fibers in the concentration of 1 mg/ml and 99% were seen. Colocynth extract with the presence of potent anti–oxidant compounds and its inhibitory effects on the production of amyloid fibrils, will be very useful in preventing and reducing the incidence of Alzheimer's disease.

Rose-scented geranium is a foliage pot plant which its indoor use is widespread. It also has an ever-increasing use in the perfume industry, cosmetics and pharmaceuticals. In order to improve the quantitative and qualitative characteristics of this house plant, the effect of salicylic acid and potassium sulfate was investigated. The factorial experiment was based on a CRD with four replications and conducted in the greenhouses of the department of horticultural sciences at Shiraz University. Foliar spray of salicylic acid and potassium sulfate were conducted at four concentrations of 0, 100, 200 and 300 mg/l, and 0, 0.5, 1 and 1.5 % respectively. The results showed that the interaction of salicylic acid and potassium sulfate on yield and quality of essential oils. According to the results, the treatment of 200 ppm salicylic acid and 1.5% potassium sulfate resulted in the greatest essential oil yield (1.01%). Geraniol and citronellol had the greatest abundance in the essential oils by 300 ppm salicylic acid application.