Author(s): Soad, MM Ibrahim, Lobna, S Taha, MM Farahat
A pot experiment was conducted during 2008 and 2009 seasons at National Research Centre, Dokki, Cairo, Egypt, Research and Production Station, Nubaria. The aim of this work is to study the effect of foliar application with benzyl adenine (BA) at (50, 100 and 150 ppm) and gibberellic acid (GA3) at (100, 150 and 200 ppm) on the vegetative growth and some chemical constituents of croton plants. Most of the criteria of vegetative growth expressed as plant height, number of branches and leaves/plant, root length, leaf area and fresh and dry weights of stem, leaves and roots were significantly affected by application of the two factors which were used in this study.All foliar applications of BA and GA3 separately promoted all the aforementioned characters in this study, as well as chemical constituents i.e. Chl. (a and b), carotenoids, total soluble sugars, total indoles ,total soluble phenols and N, P and K content compared with control plants. The highest recorded data were obtained in plants treated with GA3 200 pm for all chemical constituents and growth parameters, except stem diameter and number of branches/plant, and N, P and K % while BA 150 ppm gave the highest stem diameter and number of branches and N, P and K % and content.