Evaluation exogenous ethylene of biochemical charactersitics and enzyme activity Associated with aging of two superior ecotypes of Damask rose

In orther to evaluate the response of two genotypes of Damask rose (Rosa damascena) to exogenous ethylene, this research was conducted in randomized design (CRD). The cut stems of Damsk rose containg buds or/and open flowers, or single buds or flowers were exposed to exogenous ethylene. Placing plant organs inside the glass chambers, ethylen was injected inside the hearmatically seald chambers, geting 0, 1, 2, 3 and 4 µl/l concentration. biocehmival characteristics and enzyme activities were determind by evaluation of content of anthocyanin, flavonoide and proline or activity of catalase, peroxide lipid. Anthocyanin, proline and catalase activity in both ecotypes studied showed a reduction. (MDA) in the treatment of ethylene highest concentration showed Azaran ecotype. Reducing the content of flavonoids in Azaran was much less than Kashan. As well as reduce the total protein in Kashan was lower than Azaran. Based on the results obtained, Kashan ecotype as superior tolerant ecotype for use in breeding programs are recommended.