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Effect of wild watermelon rootstocks and water stress on chemical properties of watermelon fruit
Musa Seymen,Duran Yavuz,Muhammet Ercan,Mehmet Akbulut,Hacer Çoklar,Ertan Sait Kurtar,Nurcan Yavuz,Sinan Süheri,Önder Türkmen 한국원예학회 2021 Horticulture, Environment, and Biotechnology Vol.62 No.3
Drought is one of the most important abiotic factors that restrict the production of agricultural plants. An eff ective way toavoid the negative eff ects of drought on crops is to cultivate high-yielding varieties by grafting them onto drought-tolerantrootstocks with a strong root system. For this purpose, fi ve diff erent plant materials were used: wild watermelon rootstock,i.e., wild watermelon (A 1 and A 2 ), open-pollinated Lagenaria siceraria (gourd) rootstocks (A3), Cucurbita maxima Duchesne× Cucurbita moschata Duchesne (TZ-148) F1 watermelon rootstocks (A 4 ), and the ungrafted control. Five diff erentirrigation depths were applied considering irrigation water (IW)/cumulative pan evaporation (CPE) rations (I 100 : 1.0 IW/CPE, I 75 :0.75 IW/CPE, I 50 :0.50 IW/CPE, I 35 :0.35 IW/CPE, and I 0 :rain-fed). The results showed that the use of rootstockand water stress increased the rate of sugar content in the fruit. The highest positive relationship was found between glucoseand total sugar, whereas the highest negative relationship was observed between sucrose and malic acid. Parameters such asglucose, total sugar, and citric acid showed signifi cant changes in drought stress. Fructose and malic acid showed signifi cantdiff erences between the rootstocks. Principal Component Analysis (PCA) revealed that the A 2 I 50 application was locatedin the positive region of both components and showed important results in these parameters. The TZ148 rootstock contributedsignifi cantly to the quality of watermelon. In addition, the A 2 wild watermelon rootstock showed respectable results,especially under water stress conditions. Based on these results, we conclude that the use of wild watermelon rootstock willcontribute to the fruit quality in arid and semi-arid areas with limited water resources.