Intense Orange Color (IMAGE) Purdue University Caption The intense orange color of high pro-vitamin A maize is caused by high carotenoid content. Credit Purdue University photo/Debra J. Skinner 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.