FISH staining of Arsenophonus 16 S rRNA in whole mount of whitefly Bemisia tabaci . (A.b) DNA probe stains Arsenophonus in the bacteriocytes; (B.b) at the same concentration (1.0 pmoles) LNA probe shows higher signal and a low background while staining for Arsenophonus. Arrows indicate the bacteriocytes. White arrowhead indicates the non-specific background in DNA samples. The images have been taken at best formamide concentration for Arsenophonus DNA (30%) and LNA (70%) probes separately. Both DNA and LNA panels also show merged and DIC images (as a and c respectively).