EFFECT OF DIFFERENT ROOTSTOCKS ON GROWTH, CHLOROPHYLLAFLUORESCENCE AND MINERAL COMPOSITION OF TWO GRAFTED SCIONS OF TOMATO

Abstract

2 Two tomato scions (cvs. 'Raf' and 'Gorety') were grafted on three different rootstocks: S. torvum, 'Beaufort' (Lycopersicum esculentum × Lycopersicum hirsutum) and intermediate grafting of eggplant 'Cristal' between tomato and S. torvum (double graft). Plants were grown in Mediterranean greenhouse conditions. The response to grafting was measured through growth parameters, F v /F m and leaf macronutrients analysis, and it was compared with non-grafted plants. The scions grafted on S. torvum in simple and double graft showed lower fresh and dry weight of leaves, number of commercial fruits, plant height, F v /F m and decreased their capacity to absorb several nutrients resulting in a lower mineral concentration in scions leaves, as a result of a thickened graft union. On the other hand, both scions showed a good response when grafted on the rootstock 'Beaufort', with which growth parameters, yield and photosynthetic capacity were similar to non-grafted plants.

Rootstock x Environment Interactions on Nitrogen-Use Efficiency in Grafted Tomato Plants at Different Phenological Stages

“…Several studies in cereal crops [32][33][34] and muskmelon [35] report a positive correlation between chlorophyll content and NUtE. Our results show no changes in chlorophyll content under different NUE values, in agreement with some reports in grafted Solanaceae crops, such as tomato or bell pepper [36,37]. However, the ratio between chl a/b increased under lower light intensities, implying a switch in the allocation of N towards the light-harvesting complex instead of other protein complexes in the photosystem II [38,39].…”

Tomato Rootstock Breeding: Evaluation of Tomato Interspecific Hybrid Rootstocks Under Greenhouse Conditions

“…Grafting on a compatible rootstock achieved the following results: graft vigor (Figs. 2 and 3) resulted from increases in vascular bundle formation, hydraulic conduction, absorption and translocation of water and nutrients between the rootstock and the scion (Davis et al, 2008;Djidonou et al, 2017;Goto et al, 2013;Lee and Oda, 2003;Lee et al, 2010;Leonardi and Giuffrida, 2006;Martínez-Ballesta et al, 2010), an increased photosynthesis rate because of the scion canopy, and biomass accumulation, especially under low sunlight and CO 2 concentrations under greenhouse conditions during winter months (Hu et al, 2006); faster flowering and fruit ripening of grafts (Fig. 4) by rapid vascular fusion between the scion and rootstock of grafts that were not subjected to stresses during the grafting and adaptation processes; and increased productivity (Tables 2 and 3) because of improved plant vigor, metabolism rate, No.…”

Proceso de unión del injerto de empalme en jitomate (Solanum lycopersicum L.)

“…En los últimos años ha tomado importancia en el control de factores estresante en la producción de jitomate (S. lycopersicum L.), pimiento (Capsicum annuum L.), sandía (Citrullus lanatus Thunb) y melón (Cucumis melo L.) (Fernández et al, 2004;Goto et al, 2013). Para promover el crecimiento, mejorar características agronómicas e incrementar la tolerancia y resistencia a factores bióticos y abióticos (Colla et al, 2006;Colla et al, 2010;Vitale et al, 2014;Edelstein y Ben-Hur, 2015;Velasco et al, 2016).…”

“…In recent years it has become important for the control of stressful factors in the production of tomato (S. lycopersicum L.), pepper (Capsicum annuum L.), watermelon (Citrullus lanatus Thunb) and melon (Cucumis melo L.) (Fernández et al, 2004;Goto et al, 2013). To promote growth, improve agronomic traits and increase tolerance and resistance to biotic and abiotic factors (Colla et al, 2006;Colla et al, 2010;Vitale et al, 2014.…”