Kohlrabi (IMAGE) Cell Press Caption Kohlrabi, a member of the Brassica genus, is one of 17 vegetables tested that contain glucosinolates, a family of anti-thyroid plants toxins. Subjects with the sensitive form of the bitter receptor TAS2R38 tended to find glucosinolate-producing vegetables more bitter than those with the insensitive form of the gene. The two subject groups did not differ in their perceptions of other bitter vegetables. In the study, subjects tasted the ball at the bottom of the kohlrabi plant, which is actually a stem not a root. For more information see correspondence by Sandell et al. in the Sept. 19 issue of Current Biology. Credit Rick Davis Usage Restrictions <p>This image may only be used to illustrate a news item about this specific researchers work. If you have questions or concerns, please contact Heidi Hardman at 617-397-2879 or <A HREF="mailto:hhardman@cell.com">hhardman@cell.com</A>. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.