Effect of Eucalyptus camaldulesis alcoholic extract on antioxidant enzyme activates, sucrose synthesis enzymes and cell membrane damage of Xantium strumarium seedling

In order to evaluate the allelopatic potential of Eucalyptus camaldulesis alcoholic extract on antioxidant enzyme activites, cell membrane damage and sucrose synthesis enzymes activity of Xantium strumarium, the expriments was coducted in Islamic Azad University, Shoushtar branch at 2012. The experiment was laid out according to Completely Randomized Design with four replications and treatments were various concentration of E. camaldulesis alcoholic extract (0, 4, 8, 12, 16 and gr/L). Results indicated E. camaldulesis alcoholic extract application exhibited gradual rise inhibitory effect on seedling weight, antioxidants enzymes activities and sucrose synthetesis enzymes activity but elevated the malondialdehyde concentration in Xantium strumarium seedlings. The lowest sucrose synthesis activity (2.11 nmol prot-1 min-2), seedling dry weight (2.76mg) and highest malondialdehyde concentration (0.92 nmol gr fw-1) were noted at 20 gr L-1 concentration of E. camaldulesis alcoholic extract. In conclusion, E. camaldulesis alcoholic extract decreased seedling growth, chlorophyll content, antioxidant enzymes activates and sucrose synthesis enzymes activity of X. strumarium seedling.