Showing 6 results for yavari
Bahram Yavari, Nader Chaparzadeh, Saeed Najavand, Minaieh Minaieh , Alireza Mohammadpour,
Volume 3, Issue 7 (vol. 3, No. 7 2014)
Abstract
Different biological and environmental factors, harvesting way, transport, storage time and the method of storage are affected agricultural product properties. As a result of climacteric nature and continuous physiological life of apple fruit, the biochemical changes are very economic. This study was designed for obtain deep knowledge from this changes and effects of them in apple quality. In first week of Oct. 2012 the fruits of two apple cultivars harvested and stored in cold house (Malekan city, East Azarbaijan). Independently factors, storage time (0, 45, 90, 135 days) and cultivar (Golden delicious and Red delicious), were tested with factorial analysis in completely randomized design for some apple fruit characteristics. Results showed significant differences between cultivars in most biochemical characteristics. With increasing storage time, protein, soluble sugars, reducing and non-reducing sugars contents and the juice pH were significantly increased however, titratable acidity, total soluble solids and electrical conductivity were decreased. Cold storage did not significant change on insoluble sugars content. It is assumed that time dependent biochemical changes may occur with cold storage of apple fruits hence leads to changing the quality of fruits.
Asma Raeisi Monfared, Alireza Yavari,
Volume 9, Issue 39 (vol. 9, no. 39 2020)
Abstract
Salvia santolinifolia Boiss. is a perennial aromatic plant from Lamiaceae family that grows wild in Iran. The current study was conducted in a completely randomized design (CRD) with three replications in four habitats of Hormozgan province including Abmah, Ghotbabad, Dorahi-Meymand and Sirmand in 2018 to investigate some of the high-consumption (including calcium, magnesium, potassium and phosphorus) and the micronutrients elements (including copper, iron, manganese, zinc, molybdenum, cobalt, nickel and chromium) in soil and plants. 30 leaf samples were randomly collected from each habitat and divided into three groups of 10 for analyzing. Soil samples were collected from the area around the root of collected plants. In addition, soil physico-chemical characteristics and nutritional elements were measured by using an inductively coupled plasma measuring apparatus (ICP-OES) in lab. Data analysis was conducted by the analysis of variance and means comparision in SAS 9.4 software. The results of analysis of variance showed a significant difference among habitats for the high-consumption and the micronutrients elements (P <0.01). Also, the results revealed that in the present study, by changing the soil texture of the studied habitats from sandy loam to silty loam, the accumulation of high and low consumption elements in the soil and leaves has increased; Ghotbabad and Sirmand habitats had the highest accumulation of elements. The accumulation of high-consumption elements in all four habitats in the leaves was higher than in the soil, and in terms of low-consumption elements, the opposite was observed. Evaluation of high and low consumption nutrients in soil and leaves of natural habitats of S. santolinifolia in Hormozgan province showed that the concentration of nutrients in different habitats depends on changed to the environmental conditions of the region, including the type of parent rock, physical and chemical properties of soil, the status and shape of the elevation, altitude, climatic conditions and other factors, and knowing about these factors can help in choosing a secondary habitat to accelerate the process of domestication of this species.
Kourosh Jalali, Alireza Yavari, Leila Jafari, Mumivand Hasan,
Volume 10, Issue 42 (vol. 10, no. 42 2021)
Abstract
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.
Mansoureh Jiyanpour, Alireza Yavari,
Volume 11, Issue 49 (vol. 11, no. 48 2022)
Abstract
Zataria multiflora is one of the valuable medicinal plants belonging to the Lamiaceae family. The aromatic aerial parts of this species are traditionally used by endemic folks to flavor some native foods, also for numerous therapeutic functions. In the present study, different plant organs (leaf, flower, stalk and whole aerial organ) were collected from Fanuj region of Sistan and Balouchestan province, in the southeast of Iran, and then the variability in the essential oil contents and compositions of them were studied. The essential oils of air-dried samples were extracted by hydro-distillation. The experiment was arranged in a completely randomized design with three replications for the essential oil contents. The essential oil yields were calculated based on dry weight and the oils were analyzed by a combination of GC-FID and GC-MS techniques, investigate for chemical variability. The essential oil yields of leaf, flower, stalk and aerial part were 4.8, 5.3, 0.6 and 2.7 % (w/w), respectively. The total number of compounds identified and quantified were 17 in leaf, 17 in flower, 19 in stalk, and 19 in whole aerial organ, representing 99.0, 99.2, 97.3, and 96.2% of the total essential oil, respectively. Results of essential oil compound analysis demonstrated that thymol (31.0 – 67.1 %), carvacrol (8.4 – 36.7 %) and p- cymene (6.5 – 23.2 %) were the main compounds in the evaluated plant organs of Z. multiflora. Chemical diversity of the essential oil of Z. multiflora plant parts can be considered by medicinal plants breeders and pharmaceutical, food and cosmetic industries for breeding and processing uses.
Zahra Pahangeh, Mansoore Shamili, Negar Azarpira, Alireza Yavari,
Volume 11, Issue 49 (vol. 11, no. 48 2022)
Abstract
Guava (Psidium guajava L.) is adapted to an extensive range of soils. However, its development is strongly affected by salinity. Environmental stresses are of the major and influential factors in the amount of plant secondary metabolites, especially phenolic compounds. The purpose of this investigation was to study the leaf antioxidant and flavonoid contents (catechin, quercetin and rutin) of guava seedlings grown under 0 and 100 mM of NaCl treatment. Leaf samples collected 12 weeks after salinity stress treatment and total phenol, antioxidant capacity, malondialdehyde, catalase, peroxidase and protease activities and high performance liquid chromatography were examined. The research was conducted in a completely randomized block design and Duncan test was used for mean comparison. According to the results, salinity enhanced total phenol content amount 2.09 times. The MDA value improved in guava leaves from 0.42 mg g-1 FW under non-stress conditions to 0.76 mg g1 FW under salinity. The most catalase (182.11 μmol min-1 g-1 FW), protease (9.70 μmol min-1 g-1 FW) and peroxidase (19.99 μmol min-1 g-1 FW) activities were observed in salt exposed plants. The antioxidant capacity of the leaf extract was 62.90% in the control plants, which enhanced to 77.46% after salt treatment. The most abundant flavonoid composition of the leaf extract was rutin (770 μg mg-1 DW) in the control treatment and catechin (1110 μg mg-1 DW) in salt exposed plants. We concluded that salinity stress, in addition to a noticeable increase in the activities of catalase, peroxidase and protease enzymes, enhanced phenol, catechin and quercetin contents.
Alireza Yavari, Alireza Raheb, Mojtaba Norouzi,
Volume 12, Issue 55 (vol. 12, no. 55 2023)
Abstract
Rosa damascena Mill. is the most important scented rose species which cultivated for essential oil production in the world. The objective of the present study was to understand how different harvest dates influenced the essential oil yields and chemical compounds in petals of Rosa damascena Mill. planted for the first time under calcareous soil conditions, Sa′adat Shahr region. In the current survey, flowers were collected four times with three replications from four years old plants between 05:00 and 06:00 AM (2nd, 9th, 16th and 23rd of May, 2020). The essential oils of samples were extracted by hydro-distillation system (Clevenger apparatus) and were analyzed by a combination of GC-FID and GC-MS techniques, to check for chemical variability. The essential oil content of flowers harvested at different times ranged from 0.046% to 0.082% (w/w). The number of identified compounds were 30, of which 21 were common. The highest content of citronellol + geraniol (60.9 %), which are the most important constituents of its essential oil, was observed when the flowers were harvested in the 2nd of May. However, the lowest content of them (40.6 %) was found in the flowers of the fourth week of harvesting. n-nonadecane and n-heneicosane continuously increased from the first week (17.4 %) to the fourth week (34.8 %) of the harvest. This experiment revealed that different harvest dates can significantly modify the performance and composition of Damask rose’ essential oil. Moreover, calcareous soil conditions could be used to obtain essential oil of Rosa damascena Mill.
