Mustard-Plant Seedlings Glow (IMAGE) University of California - San Diego Caption Mustard-plant seedlings glow as the genes that control rhythmic plant growth turn on just before dawn. Credit UCSD Usage Restrictions None 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.