The golgi apparatus in honeybee photoreceptor cells: structural organization and spatial relationship to microtubules and actin filaments

Cell and Tissue Research
O Baumann

Abstract

The architecture of the Golgi complex in honeybee photoreceptors has been analyzed by electron-microscopic techniques. The Golgi apparatus consists of several hundred individual stacks of cisternae dispersed throughout the soma of the photoreceptor cell. Two distinct subpopulations of Golgi stacks are distinguishable by their topographic features: (1) a dense row of Golgi stacks is aligned along the palisade-like cisternae of smooth endoplasmic reticulum backing the photoreceptive microvilli; (2) other Golgi stacks are scattered in the remainder of the cell body. The spatial relationship of Golgi stacks to microtubules and actin filaments has also been determined. Electron-microscopic examination of high-pressure-frozen freeze-substituted retinae reveals that Golgi stacks backing the submicrovillar endoplasmic reticulum reside in a cell area without microtubules, whereas the second subpopulation of Golgi stacks is embedded amidst microtubules. Labeling studies with several actin-specific probes, viz., rhodamine phalloidin, monoclonal anti-actin antibodies, and myosin fragments, provide evidence for a juxtaposition of the submicrovillar Golgi stacks to actin filaments. The Golgi membranes are thus ideally positioned to facilitat...Continue Reading

Citations

Oct 19, 1999·Microscopy Research and Technique·A S DePina, G M Langford
Aug 27, 2010·Chemical Senses·Kathryn F Medler
Apr 15, 2010·Human Reproduction Update·Estibalitz Laresgoiti-ServitjeDavid M Olson
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Aug 21, 2012·Cytoskeleton·Homayoun KheyriDavid J Merritt
Jul 2, 2011·Journal of Insect Physiology·Luciana Karen CalábriaFoued Salmen Espindola

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