Assessment of Phytochemicals, Quality Attributes,and Antioxidant Activities in Commercial Tomato Cultivars

Abstract

To assess South Korean commercial tomato cultivars, regular and cherry tomato cultivars were grown in the greenhouse and evaluated for color attributes, titratable acidity, pH, total soluble solids, carotenoids (lycopene and β-carotene), total phenols, flavonoids, vitamin C, and antioxidant activity. Significant differences (p < 0.05 using Duncan's multiple range test (DMRT)) were observed in the levels of most phytochemicals, quality parameters, and antioxidant activity among the twenty South Korean tomato cultivars tested. Lycopene and β-carotene contents varied significantly (p < 0.05 using DMRT), from 0.95 mg•100 g-1 to 5.12 mg•100 g-1 and 0.65 mg•100 g-1 to 3.56 mg•100 g-1 of fresh weight, respectively. β-carotene contents exhibited the highest genetic variation (59.2%), followed by naringenin (52.8%) and other phytochemicals. Most of the cherry tomato cultivars had statistically higher levels (p < 0.05 using DMRT) of carotenoids, phenols, flavonoids, vitamin C, and antioxidant activity compared to the regular tomato varieties, suggesting their higher nutritional value. Lycopene content was highest in the cultivars YoYo, Jicored, Titi-Chal, TY-Endorphin, and Rubyking. Cultivars Rubyking, TY-Endorphin, and Titi-Chal also showed relatively higher antioxidant activities in three assays: 2,2-diphenyl-1-picrylhydrazyl (DPPH), 2,2'-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), and ferric ion reducing antioxidant power (FRAP) assays. All the antioxidants, except luteolin, were positively correlated with antioxidant activities; the highest correlation was observed between total phenol and antioxidant activities, followed by the correlation between rutin and vitamin C. Cultivars identified to have superior nutritional status would be useful in tomato breeding programs to further improve quality and health benefits of tomatoes for the fresh and processed markets.

<b>Organic cherry tomato yield and quality as affect by intercropping green manure

“…In year 2, the total sugar was 24% lower than that in year 1, and the reducing sugar was 25% higher than that in year 1 (Figure 3E and F). The present variety of cherry tomato had a lower SSC/TTA than cultivars of commercial cherry tomato; therefore, this variety of cherry tomatoes is less sweet than the commercial cultivars (Bhandari, Chae, & Lee, 2016). Pre-harvest factors such as soil properties, nutrition, temperature, irrigation, genetics and fruit maturity may influence fruit quality (Dorais, Ehret, & Papadopoulos, 2008;Luna, Selma, Tudela, & Gil, 2013).…”

Preharvest Treatment of Methyl Jasmonate and Salicylic Acid Increase the Yield, Antioxidant Activity and GABA Content of Tomato

“…Phenolic compounds are important secondary metabolites in plants that function as natural antioxidants and prevent chronic diseases related to excess free radicals by reducing oxidative stress [40,41]. Total phenolics correspond to the mean response of all major phenolic compounds present in fruits and vegetables [42]. Previous reports have shown In the present study, significant differences (p < 0.05) between maturity stages and elicitors treatment were also observed in β-carotene content and showed the same trend as lycopene (Figure 2B).…”

“…Phenolic compounds are important secondary metabolites in plants that function as natural antioxidants and prevent chronic diseases related to excess free radicals by reducing oxidative stress [40,41]. Total phenolics correspond to the mean response of all major phenolic compounds present in fruits and vegetables [42]. Previous reports have shown that quality of fruits and vegetables could be improved by elicitors treatments by inducing accumulation of total phenolics in artichoke [43], pack choi [11] and lemon fruit [30], as a result of enhanced phenylalanine ammonia lyase (PAL) activity and reduced activity of polyphenol oxidase (PPO) [44].…”

“…MeJA treated fruit exhibited the highest total phenolics content (273.35 mg GAE 100 g −1 ) at S2, and followed by SA treated fruit at S2 (Figure 2C). Bhandari et al [42] have assessed twenty Korean commercial tomato cultivars and reported significantly varied total phenolics content ranging from 168.20 to 290.70 mg GAE 100 g −1 . The range of total phenolics content in the present study (241.58-273.35 mg GAE 100 g −1 ) is higher than most cultivars studied by Bhandari et al [42].…”

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“…Decayed fruits Fruit decay %= 100 Total number of fruits × Phytochemical screening: Form each crude extract stock solution was prepared. The stock solution was then subjected to different tests for analysis of phytochemicals by using the standard procedures as mentioned by described by Bhandari et al [25].…”