INFLUENCE OF CORMS SIZE AND SPRAYING WITH BENZYLADENINE AND PACLOBUTRAZOL ON GROWTH AND FLOWERING CHARACTERISTICS OF FREESIA SP.L. PLANTS

This experiment was conducted at the Department of biology / College of Education for Pure Sciences / University of Diyala on the Freesia sp.L. which have the purple flowers in order to studythe effect of the corms size which are divided into small corms withweight equal to or smaller than 3 g and large corms with weight greater than 3 g intertwined with spraying with the growth regulators ( the benzyladenine)at concentration of 25 , 50 mg/l and paclobutrazol at concentration of 10 , 20 mg/L as well as the handling the comparison in the recipes of the vegetative growth of the freesia plants by using global experiment using a complete randomized design with four observations of the handling. The results that have been obtained showed the following: exceeding the plants that resulting from cultivation of the large corms in recording the biggest moral values for plant height of 43.2 cm and the number of leaves 8.4 leaf / plant and leaf area of 59.4 cm 2 /plant and the content of the papers of chlorophyll158.3 SPAD units and earliness in the number of days which are necessary for the emergence of flowering buds of 136.4 days and the number of florets 10.2 florets/inflorescences as well as vase life which amounting to 11.8 day. Spraying plants with benzylad-enine at concentration of 50 mg/l led to register the highest values for plant height and leaf area and in the required duration for the emergence of floral buds and the length of inflorescences of flowers and the number of florets and the coordination age which amounting to 49.2 cm, 63.6 cm 2 /plant , 140.6 days , 31.5 cm , 10.6 florets/inflorescences and 12.5 days respectively. While spraying with paclobutrazol at concen-tration of 20 mg /l , the lowest values for the height of plants and the number of days required for the emergence of floral buds and the length of inflorescences which amounting to 32.4 cm , 136.5 days and 24.7 cm respectively, by the other hand recorded the highest values of the number of leafs 8.8 leaf / plant and content of leafs of chlorophyll 198.1 SPAD units. Overall, the overlap between the size of the corms and spraying with benzyladenine at concentration of 50 mg/l to led to register the biggest values forthe plants height and the leaf area and the length of inflorescences while the overlap between the size large corms and spraying with paclobutrazol at concentration of 20 mg /l led to register the highest values of the recipe of number of leaves and their content of chlorophyll and decrease the number of days which are required for the emergence of floral buds. The larger values recorded for the recipe of the number of days that are required for the emergence of floral buds and the number of florets and vase life has recorded in the overlap between plants that are resulting from small corms and sprayed with benzyladenine at concen-tration of 50 mg /l