Thale Cress RCO-Gene (image) Max-Planck-Gesellschaft Caption Thale cress leaves lack the RCO-gene and remain simple (left). In the leaves of the hairy bittercress (middle) the RCO-gene inhibits cell growth between sites of leaflet formation (right; blue: active RCO-gene). Credit MPI f. Plant Breeding Research/ Lempe Usage Restrictions None 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.