Range of dek5 chloroplast membrane defects. (A and D) Normal mesophyll chloroplast. (B and C) Thick chloroplast reticulum (black arrows) in dek5. (E) Disorganized dek5 thylakoids. (F–H) Individual laser confocal scanning microscopy cross sections of protoplast chlorophyll autofluorescence. (F) Normal sibling. (G) dek5, fully fluorescent chloroplasts. (H) dek5, central thylakoid fluorescence reduced (white arrow).