Ribwort Plantain (image) Bielefeld University Caption A Bielefeld research team confirms that a fungus is responsible for increasing the concentration of the defensive metabolite catalpol in the medicinal plant ribwort plantain. Credit Bielefeld University Usage Restrictions The image may only be used with appropriate caption or credit. 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.