6th INTERNATIONAL MARDIN ARTUKLU SCIENTIFIC RESEARCHES CONFERENCE, Mardin, Türkiye, 25 - 27 Haziran 2021, ss.443-444
A climate chamber experiment was carried out to determine leaf physiological development of pepino plants, either ungrafted or grafted onto eggplant plants and cultured in Deep Water Culture (DWC). Plants were supplied with a nutrient solution having an electrical conductivity (EC) of 1.0 and 4.0 dS m-1 within January – March 2018 for six weeks. As control plants, the nongrafted ones were used under both control and salinity levels. The experiment was set as a completely randomized block design with three replications. Leaf physiological response variables such as leaf dry biomass, total leaf area, photosynthesis and leaf chlorophyll index (SPAD) of grafted and non-grafted pepino plants were analyzed. Based on the results, increasing salinity in the nutrient solution decreased leaf biomass, and negatively affected leaf physiological development of pepino plants. Pepino plants exhibited significantly higher leaf biomass when they were grafted onto eggplants as compared to non-grafted pepino plants. Under salt stress, the reduction in leaf biomass compared to control was due to a reduction in total leaf area, and photosynthesis. It is known that photosynthesis is normally reduced when plants are under any case of stress. In our results, photosynthesis was significantly reduced under salt stress at both grafted and non-grafted plants. Salinity had a significant adverse effect not only on the plant growth and development, although also on leaf area formation of both grafted and non-grafted plants. Though this adverse effect was more evident in non-grafted plants than grafted plants. In terms of leaf area, the significantly highest leaf area formation was produced at the grafted pepino plants than non-grafted ones. As a result of the present study, it can be concluded that grafting plants particularly with the same family is an advantage technique leads to producing plants with superior attributes compared to the non-grafted ones under salt stress.