Änderungen der Feinstruktur im Komplexauge von Formica polyctena bei der Helladaptation / Ultrastructural Variations during Light Adaptation in the Complex Eye of Formica polyctena
2014
Menzel, Randolf | Lange, Gisela
The dark adapted rhabdom is surrounded lengthwise by a wide margin of large vacuoles (“palisades”). The pigment granula within the retinula cells are uniformly distributed in the plasma outside of the palisades. Illumination of the eye with white light from a xenon-arc (15 · 10 ⁻⁴ cal/cm² · min) caused the pigment granula in the retinula cells to wander distally and to accumulate close to the rhabdom. The vacuole margin remained more proximal but was separated from the rhabdom by a wider plasma zone. After long-time illumination (30 min) the long pigment-cells expanded while the retinula cells simultaneously became thinner. Reference is made to the functional significance of these variations.
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