GLR (image) University of Maryland Share Print E-Mail Caption At left, normal Arabidopsis thaliana plants reproduce when pollen tubes (thin blue filaments) grow downward toward the ovules to produce seeds. At right, in a plant with a mutated glutamate receptor-like protein gene, this process happens much more slowly. Arrows in both images mark the advance of the pollen tubes at exactly the same time after pollination. Credit José Feijó/University of Maryland Usage Restrictions None 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.