Germination and Helix (IMAGE) Martin-Luther-Universität Halle-Wittenberg Caption In their work, the researchers used markers to distinguish between different plant seeds. No difference can be seen with the naked eye. Under UV light, however, transgenic seeds appear red, non-transgenic seeds green. (left picture) Credit Jessica Lee Erickson Usage Restrictions Use with credit 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.