Ahmad Majd - Department of Biology, North Tehran branch, IslamicAzad University, Tehran, Iran
Maryam Sharifshoushtari - Department of Biology, Science and Research branch, IslamicAzad University, Tehran, Iran
Taher Nejadsattari - Department of Biology, Science and Research branch, IslamicAzad University, Tehran, Iran
GolamAli Kardar - Immunology, Asthma and Allergy Research Institute, Tehran University of Medical Sciences, Tehran, Iran

Local climate changes can impact on a number of factors have been shown to influence both the development and attacks of allergic respiratory diseases and may affect the quality and amount of airborne pollen grains especially allergenic pollens. One of the most distinctive features of the anemophilous pollen grains such as ash tree is the pollen wall.In this research, investigate the microsporogenesis, tapetum and pollen wall development in Fraxinus excelsior in Tehran.

Fraxinus excelsior, Pollen wall, Tapetal cells, Climate changes