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Abstract
Several experiments were carried out in plastic houses at kaha Research Station, Horticultur Research Institute Agricultural Research Center, Ministry of Agriculture, during the period from 2003 to 2007. The study included four different experiments, namely, evaluation of cucurbitaceous and solanaceous rootstocks and melon and tomato scions to Fusarium wilt disease, effect of grafting on the melon (Cucumis melo var. Kahera 6) plants and their progeny generation, effect of grafting on the melon plants cv. Galia F1, effect of grafting on the tomato (Lycopersicon esculentum cv. Edkawy) plants and their progeny generation. The obtained results indicted that pathogenicity tests showed that compatible rootstocks of melon, i.e Cucurbita ficifolia, Cucurbita maxima, cv. Butter nut squash as well as Cucumis melo (cv. Hybrid melon No.6 and Shammam El-jordan) were resistant to Fusarium wilt. On the other hand, the tested scions, i.e. cvs Kahera 6 and Galia F1 showed the highest infection with Fusarium wilt and damping-off diseases. Tomato rootstocks, i.e. cvs VFN-8 and Jubill as well as Solanum torvum showed no infection by Fusarium wilt. Meanwhile, the other tested rootstocks, i.e. Solanum pseudocapsicum, Datura stramonium and Solanum melongena showed little infection with the Fusarium wilt. On the other hand, Solanum pseudocapsicum and S. trovum rootstocks showed no infection with damping-off of seedlings. Meanwhile, the scion cv. Edkawy showed high infection with both damping-off and Fusarium wilt. Grafted plants (either on cucurbitaceous rootstocks and solanaceous rootstocks) were resistant to Fusarium wilt and showed increased vegetative growth, higher yield and improved fruit quality as compared to ungrafted ones. Some economic characters were transferred to the following generation (progeny generation of grafted plants).The isozyme and protein analysis proved evidence of some bands in the progeny plants which were transferred from the stocks to the scions. Volatile components were extensively studied.