KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/123456789/1

Browse

Settings

Access type: UnknownSubject: search.filters.subject.Eggplant

Search Results

Now showing 1 - 2 of 2
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Enhancement of Antioxidant Activity and Bioactive Compounds in Eggplants Using Postharvest LEDs Irradiation
    (2022-02-01)
    Jarerat, Amnat
    ;
    Techavuthiporn, Chairat
    ;
    Chanchomsuek, Chanthana
    ;
    Nimitkeatkai, Hataitip
    Eggplant (Solanum melongena L.), one of the major vegetable crops, is recognized for its availability of numerous bioactive compounds and antioxidant activity. The accumulation of these compounds in plant tissues can be increased by exogenous stimuli, including light exposure. This study aimed at enhancing the antioxidant activity and bioactive compounds of eggplant using light-emitting diode (LEDs) irradiation after harvest. For this purpose, eggplant fruits were irradiated under LEDs at different wavelengths, including red (650–660 nm), blue (450–460 nm), or the com-bination of red and blue (red + blue) LEDs, for 48 h. The results indicated that red + blue LED exposure during postharvest significantly (p < 0.05) elevated the accumulation of bioactive compounds and antioxidant activity. The accumulation of major phenolic compounds, chlorogenic acid (58.59 mg/100 g FW), and gallic acid (14.25 mg/100 g FW) in the eggplant fruits was increased significantly under red + blue irradiation when compared with the control (under dark condition). The total phenolic (821.86 mg GAE/100 g FW) and the total flavonoid (595.98 mg CE/100 g FW) contents were shown to have a considerably high accumulation in the peels of eggplant after irradiation under red + blue LEDs, whereas the total carotenoid content was relatively high in the flesh of eggplant fruits. Consequently, red + blue LED irradiation can be considered as a convenient tool used for the postharvest of eggplant, with a positive effect in the increasing of important secondary metabolites. The obtained eggplant fruits proved to be a promising source of bioactive and antioxidant compounds for functional food production.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Phytochemical screening and fruit quality of commercial eggplants
    (2021-01-01)
    Chokthaweepanich, Hathairat
    ;
    Sriwicha, Suwalak
    ;
    Auvuchanon, Anyamanee
    ;
    Supapvanich, Suriyan
    Ten commercial eggplant cultivars and two allies were collected from the Northeastern region of Thailand in order to examine fruit quality and screen for selected phytochemicals. Eggplants were classified into three species including Solanum torvum, S. violaceum and S. melongena. There were 10 cultivars in S. melongena (commercial eggplants) containing cv. ‘Makhuea kai tao khaw’, ‘Makhuea khuen’, ‘Makhuea pro chao phraya’, ‘Makhuea pro look lai’, ‘Makhuea pro muang’, ‘Makhuea tor lae kaew’, ‘Makhuea tor lae khaw’, ‘Makhuea yao kaew’, ‘Makhuea yao khaw’, and ‘Makhuea yao muang’. The analysis indicated that there were significant differences (p ≤ 0.05) in fruit quality traits including color, thickness, hardness, TSS and moisture. All samples could be divided into three groups based on fruit color including white, purple, and green group. The commercial eggplants had more thickness than S. torvum and S. violaceum, but these two species had more TSS contents than commercial eggplants. The results of phytochemical screening showed that S. torvum tended to have higher alkaloid, tannin, saponin and steroid contents from the staining technique. Furthermore, ‘Makhuea yao muang’ showed the highest DPPH radical scavenging capacity (49.33%) compared to all others. The principal component and cluster analysis based on correlation of fruit traits and phytochemicals showed that all commercial eggplants were clustered in the same group. The correlation analysis indicated that TSS contents positively correlated with saponin and steroid, while TSS contents negatively correlated with thickness and moisture contents. As this study, commercial eggplants showed higher fruit quality and antioxidant activity than related species.