ミツバチ単眼の微細構造

概要

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The ocelli of the worker honey-bee were fixed in a cold 1 per cent solution of osmium tetroxide buffered to pH 7.3 for 30-60 minutes, and moreover during 2-3 hours at the room temperature, dehydrated in a graded ethanol series and embedded in methacrylate resin. Sections were examined in its structural details with an electron microscope. 1. The retinal layer is composed of a number of units, any of which is made up of two retinula cells with a rhabdom in a distal half. 2. The rhabdom consists of two rhabdomeres, either of which is derived from each retinula cell and consequently lies in the bordering phase of the retinula cells. 3. The rhabdomeres average 0.3μ in thickness, 5-6μ in breadth and 50μ in length. 4. The fine structure within the rhabdomere is similar to that observed for the ommatidium of the compound eye of honey-bee by Goldsmith, namely composed of closely packed tubules perpendicular to the bordering phase of retinula cells. A strand is also found in the center of each tubule in cross section. 5. The retinula cells sontain mitochondria near the rhabdom and pigments in a proximal half. 6. Whole retinulae are surrounded with special pigment cells and tracheal system. 7. Schematic representation of unit is shown in Figs. 18 and 19.
社団法人日本動物学会の論文
1963-02-15