Comparative responses of glucosinolates in Baemoochae and its parent plants, radish and Chinese cabbage, during development

Abstract

Baemoochae ‘BB1’ is considered a suitable plant for elucidating comparative levels of glucosinolate metabolomics because it is bred by the inter-generic hybridization of radish ‘Taebaek’ and Chinese cabbage ‘Bulam3’. This present study was conducted to determine the developmental diversity of glucosinolates in Baemoochae and its parent plants. In Baemoochae leaf and radish, the primary glucosinolate was glucoraphasatin, and its content in Baemoochae increased as it grew from 450.1 to 2325.1 µmol kg−1. In addition, the content of gluconapin, glucobrassicanapin, and 4-methoxyglucobrassicin also increased to 106.8, 50.4, and 3.4 times, respectively, during the development of Baemoochae, an effect which was also observed in Chinese cabbage. In mature Baemoochae, the levels of glucoraphanin, glucoalyssin, and gluconapoleiferin increased in the leaves, and those of glucoerucin and glucoraphanin increased in the roots, as compared to those in radish and Chinese cabbage. Therefore, glucosinolates composition in Baemoochae is similar to that in its parent plants; however, Baemoochae exhibited discrete patterns of glucosinolate distribution during developmental stages. Based on these results, the present study provides basic information of glucosinolates in Baemoochae, and will aid the understanding of changes in these metabolites during growth.