Stomata on Surface of a Plant (IMAGE) University of Washington Caption In this microscopic image of an Arabidopsis plant, stomata are small two-cell openings in the surface of plant cells. Torii and her colleagues identified signals that control where plants place their stomata. Credit Courtesy of Jin Suk Lee, Nature Usage Restrictions Photo credit required. License Licensed 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.