Application of the Mesolens for subcellular resolution imaging of intact larval and whole adult <i>Drosophila</i>

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  • G. MCCONNELL
    Department of Physics, SUPA University of Strathclyde Glasgow U.K.
  • W.B. AMOS
    Department of Physics, SUPA University of Strathclyde Glasgow U.K.

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<jats:title>Summary</jats:title><jats:p>In a previous paper, we showed a new giant lens called the Mesolens and presented performance data and images from whole fixed and intact fluorescently‐stained 12.5‐day old mouse embryos. Here, we show that using the Mesolens we can image an entire <jats:italic>Drosophila</jats:italic> larva or adult fly in confocal epifluorescence and show subcellular detail in all tissues. By taking several hundreds of optical sections through the entire volume of the specimen, we show cells and nuclear details within the gut, brain, salivary glands and reproductive system that normally require dissection for study. Organs are imaged <jats:italic>in situ</jats:italic> in correct 3D arrangement. Imaginal discs are imaged in mature larvae and it proved possible to image pachytene chromosomes in cells within ovarian follicles in intact female flies. Methods for fixing, staining and clearing are given.</jats:p>

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