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The competition was held in St. Louis, Missouri, during the ASHS Annual Conference, 25-28 July 2009. Courtesy of The Coca Cola Company, two cash prizes of $300 and $200 were awarded for the 1st and 2nd place winners, respectively. The winners of the 2009 competition are:
| First Place | Kristin Abney
University of Tennessee, Knoxville | | Carotenoid Concentrations in Brassicaceae Sprouts Do Not Differ Among Genotypes Vegetable crops marketed as sprouts are becoming increasing popular with health conscious consumers in the U.S. Research conducted by scientists at John Hopkins University School of Medicine lead to the development of broccoli (Brassica oleracea var. italic) sprouts (BroccoSprouts®) marketed based on their concentrations of the anticarcinogenic glucosinolate sulforaphane. Vegetables from the Brassicaceae family are well known for their pungent flavors and high concentrations of antioxidant secondary metabolites. Sprout blends of broccoli, clover (Trifolium L. species), mustard (B. juncea L.), radish (Raphanus sativus L.), and alfalfa (Medicago sativa L.) are now available. What remains uncertain are the concentrations of other antioxidant secondary metabolites provided by Brassicaceae sprouts. The goal of our project was to indentify and characterize carotenoid compounds present in sprout tissues of several Brassicaceae species and compare their values with BroccoSprouts. We grew and evaluated sprouts of: Brassica oleracea var. fimbriata ‘Dwarf Siberian Improved Kale’; broccoli (unknown cultivar); ‘Scarlet Globe’ radish; brown mustard (unknown cultivar); ‘Florida broadleaf’ mustard; and B. rapa var. rosularis spinach mustard (unknown cultivar). Seeds of each species were sprouted on paper towels in propagation domes in a RCB design in a glasshouse in Knoxville, TN for 16 days before harvest. BroccoSprouts were purchased locally. Pigments present in the sprouts were extracted and measured for using HPLC methodology. Across all genotypes, sprouts were found to have high concentrations of nutritionally important carotenoids (5.0, 0.6, and 2.3 mg/100 g fresh weight for lutein, zeaxanthin, and β-carotene, respectively). However, results showed no differences among genotypes for violaxanthin, neoxanthin, lutein, zeaxanthin, β-carotene, chlorophyll a, or chlorophyll b pigments. Only antheraxanthin demonstrated significant differenced among genotypes. In general, radish sprouts had the highest concentrations of chlorophyll and carotenoid pigments. Broccosprouts had the lowest concentrations of violaxanthin, antheraxanthin, zeaxanthin, β-carotene, and chlorophyll pigments. Previous research in our group has demonstrated that mature vegetables of the Brassicaceae have significant genetic variation for leaf tissue pigment concentrations. Results from this study have shown sprout tissue carotenoid concentrations can be high; however, carotenoid pigments remain at consistent levels in sprout tissues among different Brassicaceae vegetables. Additional Author: Dean Kopsell, The University of Tennessee, Knoxville, TN;
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Poster # 331 - Specified Source(s) of Funding: TN Agricultural Experiment Station |
| Second Place | Santiago Ayala
Universidad de Sonora, Hermosillo, Mexico | | Evaluation of Three Growth Regulators
in Garlic Variety Taiwan (Allium sativum L.) in Sonora, Mexico Garlic is one of the most important vegetable growing in Mexico. Increasing yield and quality is the main goal of the producer. During this study three growth regulators were evaluated. The used variety was Taiwan, with a population of 300,000 plants per hectare. A randomized complete-block design was used and the treatments were six applications per hectare applied in 20 days intervals. Treatments were: 1) Sagastym 500 cm3·ha-1; 2) Cytoburz 500 cm3·ha-1; 3) Biozyme 500 cm3·ha-1; and 4) Control. The use of Sagastym was the best with 13.43 tons/ha yield and a bulb diameter of 50.09 mm, Cytoburz was in second place with 13.05 tons/ha and 48.22-mm bulb diameter, Biozyme yield 12.88 tons/ha and 47.80 mm bulb diameter. Control got the lowest yield with 10.94 tons/ha. These results indicated that the use of growth regulators increase garlic yields and improve quality in Sonora, Mexico. Additional Authors: Jose Juvera-Gonzalez, Gabriela Juvera-Gonzalez, Fernando Juvera-Gonzalez, Jose Juvera-Bracamontes, Everardo Zamora, and Jose Guerrero-Ruiz, Universidad de Sonora, Mexico Poster # 244: Specified Source(s) of Funding: Department, College, State and /or HATCH
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