Graft Union Formation Processes in Tomatoes as a Scion onto Eggplant Rootstocks: An Anatomical Study

Evy Latifah, Moch Dawam Maghfoer, Ariffin, Eko Widaryanto, Amik Krismawati, Handoko


Several researchers described physiological pathways in herbaceous or woody plants. There had not been much research on the process of tissue anatomy changes during the unification of tomato grafting using eggplant as a rootstock to determine the most suitable combination of scion and rootstock, and the detailed stages of connection during the first 15 days after grafting. The experiment was conducted in Kediri Regency, Indonesia, and anatomical observations were carried out in the agronomy laboratory of the Faculty of Agriculture, Brawijaya University. The study was conducted for two months in May-July 2018. The experiment resulted in 12 treatment combinations. The grafting combinations include Cervo/Cervo, Karina/Karina, Timoty/Timoty, Cervo/Gelatik, Karina/Gelatik, Timoty/Gelatik, Cervo/EG 203 line, Karina/EG 203 line, Timoty/EG 203 line, Cervo/S. torvum, Karina/S. torvum, and Timothy/S. torvum. The results obtained information that the unequal stem size between tomatoes and S. torvum as rootstock causes the grafting process to be slower than other rootstocks due to the anatomical closeness factor between tomatoes and S. torvum, which have different species compared to grafted tomatoes EG 203 and Gelatik eggplant. The EG 203 line originating from the AVRDC (World Vegetable Research Center) is the result of genetic manipulation prepared as a compatible rootstock of eggplant, while Gelatik is a local eggplant that has a similar description to the EG 203 line, so it is more compatible than S. torvum. At the age of 15 days after grafting (DAG), the self-grafting scions (Cervo-Cervo, Karina-Karina, and Timoty-Timoty) showed perfect connection compared to the other combination of tomatoes as scions with eggplant rootstocks that anatomically had not yet fully fused.



Keywords: graft union, scion, rootstocks, an anatomical study.



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