کتان

After harvesting, strawberry fruit is sensitive and susceptible to pathogens due to its bitterness, soft texture, high water content, and therefore has a short storage life. This study was designed and implemented in order to investigate the effect of mucilage edible coatings and plant essential oils to increase the storage life and maintain the quality of digital Paros strawberries during 12 days of storage in a warehouse with a temperature of 4 degrees Celsius and a relative humidity of 75±5%. The effect of essential oils of thyme (Thymus vulgaris), ajowan (Trachyspermum ammi L.) and mucilage of psyllium (Plantago ovata L.) and flax (Linum usitatissimum L.) and their combination with each other were used to coat strawberry fruit. Factorial experiment in the form of completely randomized design and parameters such as percentage of decay, firmness of fruit tissue, ascorbic acid, total soluble solids (TSS), titratable acidity (TA) and acidity (pH) of fruit juice 4, 8 and 12 days It was measured after storage. Based on the results, with the progress of storage time, there was a decrease in parameters such as vitamin C, TA, tissue firmness and anthocyanin, and an increase in the decay percentage and pH of fruit juice. In general, mucilage and essential oil coating treatments alone or in combination with each other are suitable for the storage and after harvesting of Paros variety strawberries. The combined treatment of psyllium along with essential oils of thyme and ajowan having the greatest effect on the quantitative and qualitative characteristics of strawberry fruits is introduced as the best treatments in this research.

In order to evaluate quantitative and qualitative yield of some flax cultivars and accessions(Linum usitatissimum L.), an experiment was conducted at research farm of Shahid Chamran University of Ahvaz based on randomized complete block design with 12 treatments and 3 replications. Treatments were six cultivars (Golda, Oliozon, RH2, Lirina, Livia and Uanda) and six accessions (Ardebil1, Ardebil2, Ardebil3, Ardebil4, Karaj and Hamedan). The measured traits were plant height, branch number, leaf area, capsul number, seed number per capsul, seed yield, oil content and composition. There were significant differences between cultivars and accessions for all measured traits. Ardebil4 and Ardebil3 had the highest capsul number and the minimum value was recorded in Golda and Livia. The highest and the lowest seed yield were observed in Ardebil4 and Livia, respectively. The highest oil percent was recorded in Hamedan, Ardebil4 and Ardebil3 while the lowest amount was obtained in Golda. Lirina and RH2 had the highest and the lowest amounts of alpha-linolenic acid, respectively. The highest and the lowest amount of linoleic acid were recorded in RH2 and Karaj, respectively.Overall, Ardebil3 and Ardebil4 with higher seed yields, oil percentage and rich source of alpha-linolenic acid may be the best accessionsfor cultivation in Ahwaz conditions. However, more investigation is needed.

Linum album Ky. ex Boiss, belonging to the Flax family, is one of the endemic plants in Iran. To investigate the genetic diversity of this plant with using of morphological traits and fatty acid profile, 11 populations of this plant were selected from Hamadan province. In spring and summer of 2014, five whole-plant samples were selected randomly from each population at flowering and seed ripening stage. Then, quantitative (33 traits) and qualitative measurements (9 traits) were done with five replications for each trait. Data were analyzed by SAS.v9.2 software. Means were compared by Duncan's multiple range test (at the 5% level), and the relationship between fatty acids and climate characteristics were measured using canonical correlation. According to the results, this species grows in Hamadan Province at an altitude of 1551 to 2176 meters above sea level. Populations showed significant differences in all traits at the 5% level except six of them, including length, width, and length to width ratio of stem leaves as well as length to width ratio of bracts. The results showed that palmitic acid (5.5-6.5%), stearic acid (0.5-5.1%), oleic acid (21.9-28.1), linoleic acid (15.4-66.8%) and linolenic (2.0-45.7%) acid were the main components of the fatty acid in seeds of flax and Linum album, and a large difference was found for the percentage of these compounds between the two species and in different populations of Linum album. Canonical correlation of geographical and ecological characteristics with the fatty acids of seeds showed that the amount of linolenic acid in the seed oil is increased with the increase in available phosphorus, available potassium, organic matter, EC, annual precipitation, and mean annual temperature. The yield of Linum album washigher in areas with an altitude of 1700 m, average annual temperature of 13°C, annual rainfall of 340 mm and southern slopes. Although introducing a population for cultivation and domestication of Linum album needs more researches, our results showed that populations A1, A4, A7 and A10 were potentially more suiteable.

Varamin region with its dry subtropical climate is well known for being the most suitable site for the production of medicinal herbs. This study was undertaken to investigate some morphologic traits, yield and yield components of 6 medicinal plants species in a randomized complete blocks design with six treatments (species) and three replications. The 5 traits recorded during growing season were as follows: Dry biomass, hay and stands per plot (7.5 m2), earliness (days to maturity), and grain yield (kg/ha). Analysis of variance and F test of data showed the highest yield in Sesame (3512 kg/ha) and the lowest in Coriandrum, and Foeniculum (451 kg/ha). Foeniculum was the only herb that produced higher yield in the second year. In regard to maturity Coriandrum with 146 days was the longest and Foeniculum with 100 days was the earliest maturity. In order to overcome heterogeneity at harvested plants numbers, the covariance analysis was employed on some characters such as dry biomass weight per plot, and yield. The results demonstrated respectively 152.69 %, and 210.56 % relative efficiency to the analysis of variance.