Peroxisomes and chloroplasts distribution in Physcomitrella patens protonemata. Bright field and confocal images of 5 distinct zones in caulonemata (A) and chloronemata (B) expressing the CFP-SKL fusion protein to visualize peroxisomes (Perox). The chloroplasts (Chlorop) are visualized by chlorophyll autofluorescence. The top panel shows the bright field (BF). Green and red signals represent CFP and chlorophyll autofluorescence respectively. Bottom panels show the merged image of the green and red signals. Images are displayed as maximal projections of confocal sections. Arrowhead shows dividing chloroplasts. Scale bar 10 μm.