الفهرس | Only 14 pages are availabe for public view |
Abstract I. Establishment stage: Sterilization treatments had a non significant effect on survival% of Paulownia explants. However, the combined treatment with mercuric chloride + clorox gave the highest survival%, while clorox achieved the lowest value. A spontaneous rooting occurred in the establishment stage on Paulownia explants. The effect of explant type was significant on shoot length, fresh weight of shoots, number of roots and root length of Paulownia. Values of these characters were significantly higher when explants were excised with a piece of callus, compared to those without callus. The effect was insignificant concerning the total number of shoots and total number of leaves. A significant effect was exerted by MS strength on shoot length, total number of leaves, number of roots and root length. The highest values of these parameters were achieved on the normal strength of MS medium. Values of total number of leaves produced on ½MS and 1½MS besides number of roots on 1½MS are significantly among the highest ones. Values of the above-mentioned four characters declined significantly to the lowest category when explants were inoculated on MS medium at double strength (2MS). The effect of MS strength on Paulownia explants was insignificant concerning the total number of shoots and fresh weight of shoots. The interaction between explant type and MS strength had a significant effect. When explants with a piece of callus were inoculated on MS medium, root length was the highest, or on 1½MS medium, both number of roots and root length were significantly the highest,. Insignificant effects were exerted by this interaction on total number of shoots, total number of leaves, shoot length and fresh weight of shoots. |