Cassava Roots High in Provitamin A (IMAGE) American Society of Plant Biologists Caption White cassava roots (top) are low in micronutrients, whereas yellow-rooted plants can have twenty times as much provitamin A. Credit International Center for Tropical Agriculture (CIAT) Usage Restrictions Use for noncommercial, educational purposes is granted without written permission. Please include a citation and acknowledge ASPB as copyright holder. For all other uses, contact diane@aspb.org. 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.