Thesis (M.Sc.) - Cairo University - Faculty of African Postgraduate Studies - Department of Natural Resources

The present work reports the chemical synthesis of biologically active chemical compounds (quinazolines) and the experimental methods concerning their application as new potent and powerful plant growth promoters.The current work studies the effect of different structural quinazolines at different concentrations on the growth parameters of faba beans grown on sandy soils in field experiments at Ismailia Research Station, Ismailia Governorate, Egypt. A laboratory germination experiment was performed in the Regional Center for Food and Feed, Agricultural Research Center to obtain the optimum concentrations of quinazolines to be used in the field experiment. In this context, seeds of Vicia faba were germinated in different treatments of Q1, Q2, Q3, Q4, Q5, Q6, Q7 and Q8; the concentrations for each treatment were 0.02, 0.04, 0.06, 0.08 and 0.1 (g/100ml). The data of laboratory germination experiment revealed that the germination percentages among treatments and control are significantly different. The results showed that, Q1 (at concentration 0.04g/100 ml), Q2 (at concentration 0.04g/100 ml), Q3 (at concentration 0.02g/100 ml) Q4 (at concentration 0.06 g/100 ml), Q5 (at concentration 0.06g/100 ml)Q6 (at concentration 0.06g/100 ml), Q7 (at concentration 0.04g/100ml),Q8 (at concentration 0.1g/100 ml) recorded the greatest germination percent associated with highest germinated root lengths. At the end of planting period (after 136 days of planting), significant effects of growth promoters, seasons and their interaction were detected for plant heights. Across the two seasons, the highest number of leaves was in the following order: Q5> Q2> Q4> Q1> Q8 recording 297.47, 297.43, 285.00, 284.40, 283.10, respectively, with no significant differences among them

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