Correlation between â-amylase activity and starch content in different cultivars of radish (Raphanus sativus L.)

Author(s): M.G.Sarowar Jahan, M.Shaela Pervin, A.Y.K.M.Masud Rana,M.Shariar Shovon, S.C.Dev Sharma, M.Rezaul Karim, M.Habibur Rahman

Radish (Raphanus sativus L.) taproot shows amylolytic activity. However, data available on the differences in these amylolytic activities and starch content among radish cultivars in Bangladesh are quiet scanty.We analyzed the â-amylase activities and starch contents of 5 kinds of radish cultivar. The Tasaki cultivar showed the highest amylase activity, with a level about 2 times higher than that of the Red Bombay cultivar, which had the lowest. Cultivars with higher â-amylase activities showed higher starch contents. These results suggest the existence of intraspecies variations in amylolytic activities in radishes, and positive correlations between amylase activity and starch content. A positive correlation (R²  0.74) was found in regression analysis.

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