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Cuttings of Bougainvillea x buttiana "Mrs Butt" were cultured in peat moss [after treating with 1000 ppm indolebutric acid (IBA) or without] or hydroponic units contained: water, quarter Hoagland strength, half Hoagland strength, full Hoagland strength, 2.5 ppm, 5 ppm or 20 ppm IBA solutions. Results showed that treating cuttings with IBA at 1000 ppm before culturing was more effective than culturing without treating. Among the different hydroponic solution treatments, IBA solution at medium (5 ppm) or high concentration (10 ppm) had the best results, since they produced the highest values of rooting percentage, number of roots/cutting, number of shoots/cutting, shoot length, number of leaves/shoot and survival percentage. Also, using of 10 ppm IBA solution resulted in initiating the first root more rapidly than all other treatments.

300 mg/l) of L-phenylalanine or L-tryptophan each alone were foliar applied to milk thistle (Silybum marianum L.) plants to assess their effects on growth, productivity and chemical constituents. Obtained results demonstrated that the maximum values of plant growth characters (plant height, number of main branches, number of leaves /plant and herb fresh weight), yield components (number of fruits/plant, fruit weight, weight of 1000 seeds, seed weight/plant and seed yield/faddan) and chemical constituents (total nitrogen, phosphorus, potassium and total carbohydrates percentages in leaves as well as total phenolic compounds content of seeds) were recorded by spraying the plants with the highest concentration (300 mg/l) of each compound alone.

The present work was conducted in order to investigate the effect of auxin type (2,4-D and NAA) and concentration (0.00, 0.25, 0.50, 1.00 and 2.00 mg/l) on Balanites aegyptiaca callus cultures growth and production of secondary metabolites. Obtained results demonstrated that supplementation MS medium with 2,4-D at 2.0 mg/l could enhanced and recorded the ultimate values of callus fresh weight, antioxidant activity (%), total flavonoids, total phenolic compounds and total saponins contents and yields of Balanites aegyptiaca L. callus.