Characterization of Phytochemicals and Antioxidant Activities of a Purple Tomato (Solanum lycopersicum L.)

Abstract

A newly developed nongenetically modified purple tomato V118 was investigated for its phytochemical compositions and antioxidant activities. A highly efficient and sensitive UPLC method was developed for both the phenolics and carotenoids, which showed that in addition to the phytochemicals commonly known for tomatoes, V118 had a unique composition of anthocyanins. The total carotenoid content of V118 was 234.78 μg/g dry weight (DW), and the total phenolic content was 659.11 mg GAE/100 g DW. The antioxidant activities of the lipophilic extract as measured by the PCL and ORAC-L assays were 30.11 μmol TE/g DW and 11.97 μmol TE/g DW, respectively, while the hydrophilic extracts as determined by the ORAC-H and FRAP assays were 323.23 μmol TE/g DW and 54.95 μmol AAE/g DW, respectively. The LC-MS study showed three major anthocyanins, which were mainly acylglycosides of petunidin and malvidin. This study showed that purple tomatoes such as V118 possess additional phytochemicals like anthocyanins, which can potentially have added health benefits.

Tomato Productivity and Quality in Aquaponics: Comparison of Three Hydroponic Methods

“…The observed TPCs were in the middle of the range of 1.2 to 22 µg·g −1 fresh weight that has been reported for processed tomatoes [38]. The observed ORAC values were in the upper range of 12-323 µmol·TE·g −1 dry weight reported by Li et al [37] for processed tomatoes and higher than reported in Zhou and Liangli [39].…”

“…Fruit internal quality is defined by parameters such as the content of fat, lipids, proteins, vitamins, mineral nutrients and pigments [20], as well as health related parameters such as TPC and ORAC [37]. In this study, the sugar content of the investigated fruits was generally high and, as to be expected, the time of harvest had the greatest effect on fruit sugar content.…”

Characterization of phenolics, betacyanins and antioxidant activities of the seed, leaf, sprout, flower and stalk extracts of three Amaranthus species

“…The color characteristics of CIE L*, a*, b* were calibrated against a standard white plate. Data were the average of triplicate measures on equidistant points of the plant powder (Li et al, 2011). Plant powder instead of actual plant parts were used in this experiment for better reproducibility and uniformity.…”

A Validated HPLC-DAD Method for Routine Determination of Ten Phenolic Compounds in Tomato Fruits

“…Long extraction and pre-treatment steps, including freeze drying (Gautier et al 2008;Giuntini et al 2008;Gómez-Romero et al 2010;Le Gall et al 2003;Sánchez-Rodríguez et al 2011;Spencer et al 2005;VanderRest et al 2006), 15-24 h maceration (Ferreres et al 2010;Li et al 2011;Sánchez-Rodríguez et al 2011;Slimestad and Verheul 2005;Slimestad et al 2008), SPE clean-up (Le Gall et al 2003;Li et al 2011;Vallverdú-Queralt et al 2011), or multiple extraction cycles (Gautier et al 2008;Simonetti et al 2005;Spencer et al 2005;VanderRest et al 2006). ii.…”