Genome Sequence of the Pea Aphid Acyrthosiphon pisum
(A) Transmission electron micrograph showing elongate Regiella cells within a bacteriocyte (pink arrows) and nearby bacteriocytes containing Buchnera (green arrows). Black arrows indicate the bacteriome cell membrane (photo by J. White and N. Moran). Scales are in microns. (B) Position of symbiont-containing bacteriocytes within the abdomen as revealed by fluorescent in situ hybridization using diagnostic probes. Blue is a general DNA stain, highlighting aphid nuclei, red indicates Regiella, and green indicates Buchnera (photo by R. Koga).