i.e. green (GB 1) and red (RB) butterhead did not decline significantly during storage at 12 C in darkness. The limit of saleability was not reached even after 17 days of storage (Fig. 1). For both genotypes this very slow and minor decrease in ovQ was similar for heads stored with and without roots. The content of chlorophyll. carotenoids. glucose and fructose declined during storage 2 3 both the decline in these compounds was similar for heads stored with and without roots. The decline in the chlorophyll and carotenoids was more pronounced in RB than in GB 1. After 15 days of storage. the content of both compounds had decreased by about 45 the the decline was only 15 the G h. In contrast, the decline in the glucose content was more pronounced in GB than in RB.After 15 days 1 of storage, the content of glucose had decreased by about 95% in G 1. whereas the