Mitochondria and chloroplasts distribution in Physcomitrella patens protonemata. Bright field and confocal images of 5 distinct zones in caulonemata (A) and chloronemata (B) expressing the mEGFP-Cox fusion protein to visualize mitochondria (Mito). The chloroplasts (Chlorop) are visualized by chlorophyll autofluorescence. The top panel shows the bright field (BF). Green and red signals represent mEGFP and chlorophyll autofluorescence respectively. Images are displayed as maximal projections of confocal sections. Scale bar 10 μm.