Spores on Spinach Roots (IMAGE) Washington State University Caption Spores on spinach roots reveal Fusarium fungus infection. The fungus invades the plant's vascular system, feeding on the plant and stealing its water and nutrients. Credit Washington State University 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.