Joints and Tomato Plant (IMAGE) Cold Spring Harbor Laboratory Caption Without the nubby joints that are normally present on the stems of tomato plants, the fruit is much easier to harvest. However, researchers have discovered how a cryptic mutation can get in the way of this otherwise desirable trait. Credit Lippman lab/CSHL Usage Restrictions Attribution necessary 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.