Journal
JOURNAL OF MICROSCOPY
Volume 238, Issue 2, Pages 95-101Publisher
WILEY-BLACKWELL
DOI: 10.1111/j.1365-2818.2009.03360.x
Keywords
Chitin; CLSM; collagen; Congo red; crustaceans; cuticle; exoskeleton; fluorescence staining; morphological imaging; polychaetes
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Funding
- Helmholtz Society
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P>In this study, the potential of the common dye Congo red as a fluorescence marker for chitin in the exoskeleton of small crustaceans and collagen in the polychaete cuticle was tested. The Congo red staining turned out to be rather efficient and yielded intensively fluorescing structures, which made a very detailed visualization by confocal laser scanning microscopy possible. The excellent results are comparable to those described for the utilization of other efficient fluorescence dyes and intense autofluorescence. The application of Congo red is easy, the fluorescence of this dye is very stable, and the excitation maximum of the structures stained with Congo red is in a range, which is covered by the lasers of most of the confocal laser scanning microscopes. These advantageous properties make the fluorescence staining by Congo red a method of choice for the detailed visualization of the external morphology of small crustaceans and polychaetes.
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