CT image of plant roots (VIDEO) University of Nottingham This video is under embargo. Please login to access this video. Caption Video showing that tomato roots (wild type) do not produce branches in air or without water. However, notabilis mutant which is deficient in hormone ABA can branch out in soil air spaces. Credit Brian Atkinson, University of Nottingham 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.