Proplastid in a Seed Embryo Cell (IMAGE) Université de Genève Caption Proplastid (yellow) in a seed embryo cell. The wall (brown) separates two cells, their vacuoles (light grey) and their cytoplasm (blue). Credit © Sylvain Loubéry, UNIGE Usage Restrictions None 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.