A Review of the Chemical Composition of Essential Oils of Thymus Species in Iran Ahmad Reza Golparvar1,*, Amin Hadipanah2 1- Department of Agronomy and plant Breeding, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran; 2- Department of Plant Biology, Faculty of Sciences, Shahrekord University, Shahrekord, Iran * Corresponding Author E-mail: a.golparvar@khuisf.ac.ir Received: 3 October 2022 Accepted: 18 January 2023 Abstract The genus Thymus from the Lamiaceae family has more than 300 species distributed worldwide, including in Europe and Asia. 18 Thymus species have been identified in Iran's flora, of which 4 are endemic to Iran. Thymus species are known as medicinal plants due to their biological and medicinal properties. Thyme has many biological activities, including antimicrobial, antioxidant and anti-inflammatory effects. Therefore, Thymus species interest many pharmaceutical, food and cosmetic industries. Throughout the evolution of plants, essential oils have played a crucial part in the direct and indirect defenses of plants against possible predators and pathogens, as well as in the processes of plant reproduction by attracting pollinators and disseminators to the seeds The present study was conducted to investigate the chemical composition of essential oils of Thymus species in Iran. The information and findings in this review were obtained from scientific databases and search engines, including Web of Knowledge, PubMed, ScienceDirect, Medline, Reaxys and Google Scholar. In this research, we investigated different species of Thymus collected wild and cultivated in different parts of Iran. The results showed that the main composition of thyme included thymol, carvacrol, geraniol, γ-terpinene and linalool. The conclusion of this review shows that plant compounds are a promising source of bioactive compounds that can be explored for development against diseases and complications associated with its chemical drugs. Manuscript profile

Original ResearchEvaluating the Resistance of Various Potato Genotypes to Early Blight Disease Caused by Alternaria alternataNeda Peymani1, Ahmadreza Golparvar1*, Mehdi Nasr-Esfahani2, Esmaeil Mahmoudi3, Majid Shams11- Department of Agronomy and Plant Breeding, College of Agriculture, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran2- Department of Plant Protection Research, Isfahan Agriculture and Natural ResourceResearch and Education Center (AREEO), Isfahan, Iran3- Department of Plant Pathology, College of Agriculture, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran*Corresponding author E-mail: a.golparvar@khuisf.ac.irReceived: 10 March 2020 Accepted: 22 May 2020AbstractEarly blight disease (caused by Alternaria alternata (Fr.) Keissler) is one of the most important potato diseases around the world which causes the death of the leaf tissues and sharp decrease in the final yield. Identifying and using resistant potato cultivars is one of the effective methods to deal with this disease. In the current study, the resistance of 46 potato genotypes (including 24 genotypes of Isfahan and 22 common genotypes of Isfahan and Shahrood) were investigated in the field by evaluating the severity of the disease in six levels from 0 to 6 (0-100%). The results showed that there were significant differences between the resistances of different potato genotypes. Three resistant genotypes (R1/33/10, R2/33/3 and R2/33/21) and three sensitive genotypes (8707/106, 8703/804 and 8707/112) were selected to investigate the changes of plant biomass and were inoculated with the spores of the disease-causing fungus (106) in the greenhouse. Biomass parameters showed significant decrease compared to the control samples. The amount of this decrease was much higher in sensitive genotypes than resistant genotypes. The knowledge obtained from this study can be useful for the production of disease-resistant potato cultivars. Manuscript profile