Microscopic image of mitochondria (green) and chloroplasts (red) in mesophyll cells in a leaf of Arabidopsis thaliana. The interior of the mitochondria (matrix) is marked by a fluorescent protein; in the chloroplasts, the chlorophyll fluoresces.

Microscopic image of mitochondria (green) and chloroplasts (red) in mesophyll cells in a leaf of Arabidopsis thaliana. The interior of the mitochondria (matrix) is marked by a fluorescent protein; in the chloroplasts, the chlorophyll fluoresces.