Mutant Grass Stomata (image) Carnegie Institution for Science Share Print E-Mail Caption This image shows mutant grass that's lacking the BdMUTE gene, which is responsible for the four-celled stomatal architecture normally found in grasses. In this mutant, a two-celled stomatal valve develops instead, which is much less efficient. Credit Dominique Bergmann and Michael Raissig Usage Restrictions With credit 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.