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Selahle K.M.,Tshwane University of Technology | Sivakumar D.,Tshwane University of Technology | Jifon J.,Tshwane University of Technology | Jifon J.,Vegetable and Fruit Improvement Center | Soundy P.,Tshwane University of Technology
Food Chemistry | Year: 2015

Postharvest responses of red ('HTSP-3') and yellow ('Celaya') sweet pepper fruit yield, quality parameters and bioactive compounds (to three types of photo-selective nets and a standard black net) were investigated in this study. Red and yellow peppers produced under the black net retained higher β-carotene, lower total phenolic contents and showed deep red and orange colour after storage. Both peppers produced under the pearl net retained a higher ascorbic content, antioxidant scavenging activity, fruit firmness and also reduced weight loss after storage. Red and yellow peppers grown under pearl and yellow nets resulted in a higher percentage of marketable fruit, after storage. Red pepper grown under the yellow net showed a higher number of odour active aroma compounds in the fruit, while black nets significantly affected the synthesis of odour active aroma compounds during storage. Sensory analysis indicated a preference for red pepper fruits after storage from plants grown under pearl nets. © 2014 Elsevier Ltd. All rights reserved. Source

Wang T.,Texas A&M University | Sistrunk L.A.,Texas A&M University | Leskovar D.I.,Texas AgriLife Research Center | Leskovar D.I.,Vegetable and Fruit Improvement Center | And 2 more authors.
Seed Science and Technology | Year: 2011

Fatty acid profiles, starch content and germination of watermelon seeds differing in seed vigour were determined for 4 triploid and 2 diploid lines. There were major differences in the fatty acid profiles between diploids and triploids. A major increase in the relative amounts of the unsaturated linoleic acid (CI8:2) was found in triploids. Diploids had significantly higher starch levels than triploids. There was a high correlation between starch content and mean germination time. Conversions of seed storage reserves during early germination events may differentially affect seed vigour in triploid and diploid watermelon seeds. Source

Butcher J.D.,Vegetable and Fruit Improvement Center | Crosby K.M.,Vegetable and Fruit Improvement Center | Yoo K.S.,Vegetable and Fruit Improvement Center | Patil B.S.,Vegetable and Fruit Improvement Center | And 3 more authors.
HortScience | Year: 2012

Habanero peppers have become increasingly popular in the United States for supplying unique flavors and high levels of pungency. As consumption of this product increases, development of improved cultivars with elevated phytochemicals will likely result in additional demand from consumers. This study evaluated fruit size, capsaicinoid, and flavonoid concentrations in six Habanero (Capsicum chinense) genotypes grown at three different Texas locations: College Station, Uvalde, and Weslaco. Five of these Habanero experimental hybrids (H1-red, H2-orange, H3-orange, H5-dark orange, and H6-yellow) were developed at Texas A&M University with genetic improvement in numerous traits of interest, and Kukulkan F1 (Kuk-orange) was included as a commercial control. In general, H1-red had the largest fruits in these locations. Capsaicin and dihydrocapsaicin (DHC) concentrations were highest in Kuk-orange followed closely by H5-dark orange and were lowest in H6-yellow. Fruit at Weslaco was larger and contained more capsaicin and DHC than those produced in Uvalde or College Station. Although flavonoid contents were variable and low in all genotypes and locations, H3-orange showed themost stability for use in future crossing schemes to compete againstKuk-orange for this characteristic. Our results suggest that variation in phytochemicals in fruit tissue of Habanero genotypes can be exploited by selecting in an appropriate environment. Source

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