Growth of Galls Via Stem Cells Proliferation (image) Kumamoto University Share Print E-Mail Caption Infection by the root-knot nematode was found to stimulate stem cell activity in plant roots thereby causing the formation of galls on plant roots. The blue stained areas are stem cells. Credit Professor Shinichiro Sawa Usage Restrictions This image may only be used in conjunction with the accompanying release, or stories written about the work described in the release with reference to the original work. 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.