The leaves of the terrestrial orchid Ophrys sphegodes Miller possess two entirely different types of plastid. Mesophyll cells contain chloroplasts with well-developed grana and scattered plastoglobuli. By contrast, vascular parenchyma cells have plastids which lack thylakoids. Their shape varies from spherical to irregularly cup-shaped.
If you can't find a tool you're looking for, please click the link at the top of the page to "Go to old article view". Alternatively, view our Knowledge Base articles for additional help. Your feedback is important to us, so please let us know if you have comments or ideas for improvement.