eng Oriental Scientific Publishing Company Biomedical and Pharmacology Journal 0974-6242 2018-03-25 11 1 45 51 10.13005/bpj/1346 19558 article Laila A. Baqasi 1.2 Huda A. Qari 1.2 Ibrahim A. Hassan 2.3 Department of Biology, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia. Centre of Excellence in Environmental Studies (CEES), King Abdulaziz University, 21589 Jeddah, Saudi Arabia. Department of Botany, Faculty of Science, Alexandria University, 21589 El Shatby, Alexandria, Egypt. This study was to conducted to investigate the use of ethylenediurea (EDU) as a possible tool to evaluate O₃ effects on wheat (Triticum aestivum L.) plants under field conditions in Jeddah. Wheat plants were expsoed to ambient O₃ (AA) and the antiozonant chemical ethylenediurea (EDU) in closed fumigation chambers for the full growing season. Growth, yield and physiology were determined in response to O₃ and/or EDU. EDU-treated plants had higher photosynthetic rates (24%) and stomatal conductance (25%), which were reflected in higher growth and yield in terms of number of grains. The present study revealed that EDU could be used as a promising tool to mitigate damaging effects of O₃ on under field conditions. EDU protected wheat plants leading to increases in photosynthetic rates, growth and yield. https://biomedpharmajournal.org/vol11no1/physiological-and-biochemical-response-of-winter-wheat-triticum-aestivum-l-to-ambient-o3-and-the-antiozonant-chemical-ethylenediurea-edu-in-jeddah-saudi-arabia/ Ethylenediurea (EDU) Growth Ozone Protection and Yield