Cacao Trees (image) Penn State Share Print E-Mail Caption Cacao trees growing at a research facility in Ecuador. Seed-filled pods hang from the branches. Penn State scientist Mark Guiltinan leads a research team studying the genetics behind key traits of the plant. Credit Mark Guiltinan, Penn State Usage Restrictions non commercial use only Share Print E-Mail 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.