Mycorrhizal Fungi (IMAGE) Smithsonian Tropical Research Institute Caption The association of mycorrhizal fungi with tree roots extends their ability to take up nutrients from the surrounding soil. Scientists can now detect which of two kinds of mycorrhizal fungi are associated with tree roots. Credit Thomas Pruß [<a target="_blank"href="http://creativecommons.org/licenses/by-sa/3.0">CC BY-SA 3.0</a>], via Wikimedia Commons Usage Restrictions Thomas Pruß [<a target="_blank"href="http://creativecommons.org/licenses/by-sa/3.0">CC BY-SA 3.0</a>], via Wikimedia Commons 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.