Coiled Pollen Tubes (image) Brown University Share Print E-Mail Caption With the proper genes disabled, pollen tubes coiling in the ovule of plants don't burst to release their pollen. Instead, they just keep coiling. Credit Johnson lab/Brown University Usage Restrictions With credit. Higher res available. 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.