الفهرس 
ACKNOWLEDGEMENTS
Factors affecting adventitious root formationOnly 14 pages are availabe for public view
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Abstract
The present investigation was carried out in the Floriculture Experimental Farm, Faculty of Agriculture, Assiut University during three successive seasons of 2012/2013, 2013/2014 and 2014/2015. It included two experiments; each involved two indoor foliage plants of Dracaena marginata, Lam. and Cordyline terminalis, L. The objectives were to increase their productions by determining the rooting ability of their stem cuttings and understanding the reasons of ease or difficult-to-root, that require application of growth regulators and by improving growth characteristics of the new generated plants by selecting the most suitable potting media to produce an acceptable pot-plant of both species.
1st experiment “Root formation studies”
The aims of these studies were to verify rooting ability responses of cuttings to auxins application of IAA, IBA and NAA, each at 1000 ppm as powder (auxin with talc and fungicide), besides untreated cuttings. Furthermore, define the responses to branch portions were cuttings taken; tip, middle and basal for dracaena or tip and middle for cordyline and the interaction influences among treatments on root formation and root, as well as, shoot growth characteristics of the newly generated plants. Transverse sections in rooting zone of cutting to verify the behavior of root initiation and development under the different treatments and the determination of carbohydrates/nitrogen (C/N) ratio in cutting bases were done. 2nd experiment “Potting media and foliar nutrition studies The objectives of these studies were to select the most suitable potting media [clay, peat moss+ perlite (1:2) and peat moss+ vermiculite (1:2)], in addition, the best foliar fertilizer treatment of Super Plant Care (NPK 20:20:20) at the rate of 1.5 g/l; the newly generated plants of both spices received one-spray or two-sprays per month, besides unsprayed.