Figure 1.

Transmission electron microscope analysis of chloroplasts from 15 plant species. Some of the plants were grown for 4 weeks in a sunlit greenhouse with day/night temperature of 28/20°C using a 12/12-h light/dark cycle under a light intensity of 100 μmol photons m⁻² s⁻¹. The other plants grown in natural conditions were collected in Sichuan province, China. For the plants grown in natural conditions, green and young branches or seedlings were selected. After one day acclimation in the greenhouse (under a 12/12-h light/dark cycle of the light intensity of 100 μmol photons m⁻² s⁻¹), the leaves or plants were harvested for thylakoid ultrastructure observation.