How Plants Make Friends with Fungi (IMAGE) Karlsruher Institut für Technologie (KIT) Caption Under the microscope (confocal microscopy): the AM fungus (green) reaches the inner root cortex and forms arbuscules (s. arrow; tree-like structure, Latin arbor = tree). Credit Figure: Carolin Heck/KIT 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.