Dust storms are increasingly threatening all ecosystems in the western part of Iran, especially forest ecosystem, causing a significant reduction in their stability. Persian oak (Quercus brantii) due to covering most part of Zagros forest is at the front line of the attack. Most tree deaths come from this species. The aim of this study was to investigate the effect of dust under simulated conditions on wood development and leaf stomata from seedlings of Persian oak. The oak seedlings were put in a chamber and dust them from 9 a.m. until 6 p.m. at three different days with an interval of 12 days. The seedlings were dusted at three increasing concentrations (5000, 7000, and 9000 mg/m3) were applied. Leaf and wood samples were collected and the leaf stomata features, growth ring and vessel features were examined. The results showed no variations in stomata features, but growth ring, vessel number and diameter were considerably changed. No detection of differences in stomatal features could be due to the short-period of the treatment. The changes in wood traits are in line with the hypothesis that stress might disrupt the hormonal regulation for wood formation and also the tree’s capability for water conductivity. It can be concluded that dust storms can negatively affect wood formation and structure and might make a change in leaf stomatal features by the continuum of the dust storm.
