Mature Sorgum (image) Penn State Share Print E-Mail Caption A mature sorghum head of a frost tolerant breeding line being developed at Penn State. This sorghum head shows accumulation of red flavonoid compounds. Credit Surinder Chopra, 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.