AMF Marker (IMAGE) Max Planck Institute for Chemical Ecology Caption Plants, like this wild tobacco Nicotiana attenuata, produce blumenol C derivates (blue) in their roots when they have established a functional symbiosis with arbuscular mycorrhizal fungi (pink). The substances are transported into the leaves and can be used as foliar markers for successful fungal associations. Credit Ming Wang, Max Planck Institute for Chemical Ecology 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.