Abstract: An Egyptian variety of clover plants (Trifolium alexandrinum L. cv. Messkawy) were either untreated (control) or treated with soil drench of Ethylenediurea (EDU) at 50, 100, 150, or 200 ppm or benomyl at 250, 350, 450 or 550 ppm for the whole growing season and sown in the soil either under Egyptian field conditions at a rural site in northern Egypt or in open top chambers receiving either charcoal filtered or no-filtered air. It was noticed that both EDU and benomyl caused an increase in growth parameters and provided some protection against O3 visible injury symptoms, with EDU having better protection than benomyl. Moreover, photosynthetic rates were increased in treated plants while stomatal conductance did not show any significant difference from control plants under OTCs conditions. It is clear from the results of the present investigation that benomyl and EDU would be useful tools to assess the effects of ambient O3 on plants under Egyptian field conditions. The implications to Egyptian agriculture were discussed.
I.A. Hassan , J.N.B. Bell and F.M. Marshall , 2007. Effects of Air Filtration on Egyptian Clover (Trifolium alexandrinum L. Cv. Messkawy) Grown in Open-Top Chambers in a Rural Site in Egypt . Research Journal of Biological Sciences, 2: 395-402.