Tagging petunias for volatiles extraction (IMAGE) Purdue University Caption Xing-Qi Huang, a postdoctoral scientist in the Dudareva laboratory, tags a petunia that will bloom in the next 24 hours. Researchers select flowers that have just bloomed to extract volatiles at their peak. Credit Purdue Agricultural Communications/Tom Campbell Usage Restrictions This image may be used by news organizations in reports referencing Purdue University’s research on floral volatiles. License Original 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.