Ultrastructural changes of the microvillar cytoskeleton in the photoreceptor of the crayfish orconectes limosus related to different adaptation conditions

Hevers, Wulf; Stieve, H.

doi:10.1016/s0040-8166(95)80061-1

Cited by 4 publications

(3 citation statements)

References 47 publications

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“…The shrimp eye preparations (cryomicrotome cuts stabilized with glutaraldehyde) were provided by P. Jaros, Universität Oldenburg [19]. The organelle scheme of nuclei, reticula cell, rhabdoms, microvilli, tapetum cell, and basal lamina is known [20]. Again, the chemical contrast serves for the identification of the organelles.…”

Section: Snom On Stained and Unstained Shrimp Eye Preparationsmentioning

confidence: 99%

Scanning near‐field optical microscopy on rough surfaces: Applications in chemistry, biology, and medicine

Kaupp

2006

International Journal of Photoenergy

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Shear-force apertureless scanning near-field optical microscopy (SNOM) with very sharp uncoated tapered waveguides relies on the unexpected enhancement of reflection in the shear-force gap. It is the technique for obtaining chemical (materials) contrast in the optical image of “real world” surfaces that are rough and very rough without topographical artifacts, and it is by far less complicated than other SNOM techniques that can only be used for very flat surfaces. The experimental use of the new photophysical effect is described. The applications of the new technique are manifold. Important mechanistic questions in solid-state chemistry (oxidation, diazotization, photodimerization, surface hydration, hydrolysis) are answered with respect to simultaneous AFM (atomic force microscopy) and detailed crystal packing. Prehistoric petrified bacteria and concomitant pyrite inclusions are also investigated with local RAMAN SNOM. Polymer beads and unstained biological objects (rabbit heart, shrimp eye) allow for nanoscopic analysis of cell organelles. Similarly, human teeth and a cancerous tissue are analyzed. Bladder cancer tissue is clearly differentiated from healthy tissue without staining and this opens a new highly promising diagnostic tool for precancer diagnosis. Industrial applications are demonstrated at the corrosion behavior of dental alloys (withdrawal of a widely used alloy, harmless substitutes), improvement of paper glazing, behavior of blood bags upon storage, quality assessment of metal particle preparations for surface enhanced RAMAN spectroscopy, and determination of diffusion coefficient and light fastness in textile fiber dyeing. The latter applications include fluorescence SNOM. Local fluorescence SNOM is also used in the study of partly aggregating dye nanoparticles within resin/varnish preparations. Unexpected new insights are obtained in all of the various fields that cannot be obtained by other techniques.

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Section: Snom On Stained and Unstained Shrimp Eye Preparationsmentioning

confidence: 99%

Scanning near‐field optical microscopy on rough surfaces: Applications in chemistry, biology, and medicine

Kaupp

2006

International Journal of Photoenergy

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“…Such morphological changes are regulated by cytoskeletal components, actin and tubulin. Organelle movement in plant cells and organelle translocation in animal cells are regulated by actin filaments and/or microtubulues[14,17,27]. Contraction and elongation of cone cells in fish eyes are regulated by actin and microtubles, respectively[16].…”

Section: Discussionmentioning

confidence: 99%

“…Contraction and elongation of cone cells in fish eyes are regulated by actin and microtubles, respectively[16]. Rhabdom size of octopus[15] and some terrestrial isopods, fly, and crayfish are also controlled by actin filaments[13,14,27]. The morphological change of the ocelloid of Erythropsidinium in response to light resembles the alteration in size of rhabdomere cells of some cephalopods and arthropods.…”

Section: Discussionmentioning

confidence: 99%

Function and Evolutionary Origin of Unicellular Camera-Type Eye Structure

et al. 2015

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The ocelloid is an extraordinary eyespot organelle found only in the dinoflagellate family Warnowiaceae. It contains retina- and lens-like structures called the retinal body and the hyalosome. The ocelloid has been an evolutionary enigma because of its remarkable resemblance to the multicellular camera-type eye. To determine if the ocelloid is functionally photoreceptive, we investigated the warnowiid dinoflagellate Erythropsidinium. Here, we show that the morphology of the retinal body changed depending on different illumination conditions and the hyalosome manifests the refractile nature. Identifying a rhodopsin gene fragment in Erythropsidinium ESTs that is expressed in the retinal body by in situ hybridization, we also show that ocelloids are actually light sensitive photoreceptors. The rhodopsin gene identified is most closely related to bacterial rhodopsins. Taken together, we suggest that the ocelloid is an intracellular camera-type eye, which might be originated from endosymbiotic origin.

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The Limulus ventral photoreceptor: Light response and the role of calcium in a classic preparation

Dorlöchter

Stieve

1997

Progress in Neurobiology

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Ultrastructural changes of the microvillar cytoskeleton in the photoreceptor of the crayfish orconectes limosus related to different adaptation conditions

Cited by 4 publications

References 47 publications

Scanning near‐field optical microscopy on rough surfaces: Applications in chemistry, biology, and medicine

Scanning near‐field optical microscopy on rough surfaces: Applications in chemistry, biology, and medicine

Function and Evolutionary Origin of Unicellular Camera-Type Eye Structure

The Limulus ventral photoreceptor: Light response and the role of calcium in a classic preparation

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