Estimating Fruit Phenol Content in Wild and Interspecific Hybrid Tomatoes Solanum habrochaites through Leaf Phenol Content Estimation

Öz

The experiment conducted at the Horticulture Department of the University of Kentucky during the spring and summer of 2020 aimed to examine the phenolic content of different types of tomatoes in detail. The plant materials used in the study included open-pollinated tomato varieties called Zaofen-2, Maglia Rosa, and Black Tomato, as well as a wild tomato accession known as Solanum habrochaites (WT-LA2329) and interspecific hybrid plants. The results of the experiment revealed that the phenolic content was found to be higher in the fruits compared to the leaves. The fruit samples exhibited a wide range of phenolic content, varying from 200 to 800 µg g-1 of fresh weight. On the other hand, the leaves ranged from 75 to 230 µg g-1. According to leaf phenolic content, both the hybrid varieties and the wild variety WT-LA2329 displayed higher concentrations of phenolic compounds in comparison to the commercial varieties. Notably, the interspecific hybrid family IS-N152 exhibited the highest phenolic concentration in the leaves, measuring 353 µg g-1, which significantly surpassed other genotypes. When it came to the fruit samples, the wild variety WT-LA2329 exhibited the highest phenolic concentration, measuring 819 µg g-1. Conversely, the cultivated tomatoes (Zaofen-2, Maglia Rosa, and Black Tomato) displayed the lowest phenolic concentrations, averaging at 235±10.0 µg g-1. The phenolic concentrations of the hybrid varieties fell within this range, varying from 230 µg g-1 to 354 µg g-1. On average, the phenolic content of the fruit in all hybrid families (291 ± 8.2 µg g-1) was slightly higher than that of commercial varieties. Furthermore, the study found a strong positive correlation (r=0.80) between the phenolic content of the leaves and fruits, suggesting a potential causal relationship. These findings highlight the significant differences in phenolic content between wild and cultivated tomato species, with interspecific hybrids showing an increase in phenolic content. Further investigation of phenolic content in early hybrid generations was suggested, as it could help identify individuals with higher phenolic concentrations in their fruit, similar to the wild parent. This line of research may contribute to the development of tomato cultivars with higher phenolic content, desirable due to the potential health benefits of phenolic compounds.

Anahtar Kelimeler

• Wild tomato
• Solanum lycopersicum
• Solanum habrochaites
• Interspecific hybrid
• Phenols
• Leaf
• Fruits

Kaynakça

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