In this study we investigated the variation of glucosinolate profile and the amount of antioxidant compounds (total phenols, ascorbic acid and carotenoids) during germination from seed to sprout at 10°C, 20°C and 30°C in two species, broccoli (Brassica oleracea var. italica) and rocket (Eruca sativa L.). The percentage of germination varied in relation to the species and the growth temperature: it was greatest in rocket and the better results were obtained at 20°C. The glucosinolate profile was different between broccoli and rocket, with glucoraphanin as the main component in broccoli and glucoerucin in rocket. The temperature of germination had a significant influence on their total amount, with the maximum at 30°C. Broccoli showed the highest antioxidant response at 10°C and 20°C, while rocket at 10°C. Seed extracts showed the lowest response. Simple linear regression analysis has been performed and the highest correlation was found between the two antioxidant assays. A significant correlation was also found between the two antioxidant assays and the total phenol content. On the other hand, the glucosinolate content and the antioxidant indexes were not significantly correlated.
|Titolo:||The Glucosinolates and Variation of Antioxidant Compounds in Seeds and Sprouts of Broccoli (Brassica oleracea L. var. italica) and Rocket (Eruca sativa L.) in Relation to Temperature and Germinative Stage|
|Data di pubblicazione:||2013|
|Appare nelle tipologie:||1.1 Articolo in rivista|