Effect of sprinkling of wheat seeds with ethylene chlorol in raising the tolerance of plants to 1- the effect of the elimination of some phenotypes

Seeds of Triticum aestivum L. (Abu-Greab-3-cultivar) were usedto indicate the possibility of spraying of wheat seedlings with ethyleneglycol (EG) (an antifreeze substance) to increase the freezing tolerance ofwheat plants .The study was catTied out during the winter of 2003-2004as factorial experiment ( 4x4) according to randomize complete blockdesign (RCBD) with three replicates .The first factor comprised fourlevels of EG(0,5,10,20%.v/v) ,while the second factor comprised fourperiods of exposure to -5c (0 ,6 , 12 and 24 hrs ).Different concentrationsofEG showed significant increase at 0.05 level of significance in: percentof survival plants , main stem height, no. of tillers/plant and amourit ofchlorophyll a and b fresh and dry weights of first ,second and third leavesand complete plant .The increase in freezing periods showed significantdecrease at 0.05 level of significance in all mentioned parameters .Theinteractions between the tow factors were also significant indicating thatthe presence of EG eliminated the bad effects of freezing on plants ;andthe results indicated that 10% of EG was better that other concentrationsused.