عنوان مقاله [English]
Saffron petals, which make up a significant proportion of the saffron flower, are discarded annually in large amounts as waste. While this part of the flower also contains compounds such as phenol, anthocyanin and flavonoid and antioxidant properties. In order to evaluate secondary metabolites, total phenol content and antioxidant capacity of petals in saffron ecotypes, a randomized complete block design with three replications was conducted under normal and one irrigation conditions at the research farm of university of Zanjan on three years old saffron plants. The eight saffron ecotypes that have good performance in this area were studied. In order to measure and determine secondary metabolites, total phenol content and antioxidant properties of saffron petal extract, UV-Visible Metering Spectra, folicum cytochiotic and free radicals methods were used, respectively. Combined analysis of variance showed that the difference between secondary metabolites and antioxidants was not significant in two irrigation conditions. Total phenol content was significantly different under conventional irrigation and once irrigation, and the Torbatejam ecotype with highest amount (86.66 mg gallic acid per gram of methanolic extract) was significant only with Gorgan ecotype. In both irrigation conditions, the evaluated ecotypes exhibited suitable amounts of picocrocin, safranal, phenol and antioxidants, which justify the extraction and utilization of them.