Licensing

Attribution_by_nc_nd
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Description

Light micrograph of Volvox taken using Rheinberg illumination. Volvox form large (approximately 500 µm) spherical colonies that can contain up to 15,000 biflagellate, photosynthetic cells embedded in their gelatinous walls. The colonies are hollow (coenobia) and often found with daughter colonies, and/or groups of gametes lying inside them. Beating of the flagella is strongly co-coordinated so that, for instance, colonies can rapidly react to a light source by swimming toward it. They are mainly found in freshwater ponds. The image is of a live specimen captured with a 0.5 microsecond flash.

Technical Details

B0007761 Colony of volvox with eight daughter coenobia. Wellcome Images available under the following creative commons usage http://creativecommons.org/licenses/by-nc-nd/2.0/uk/ See the following website for a description of Rheinberg illumination http://micro.magnet.fsu.edu/primer/techniques/rheinberg.html

Biological Sources

NCBI Organism Classification
Volvox
Cell Type
gamete
Cellular Component
flagellum
coenobia

Biological Context

Biological Process
colonization of cells

Attribution

Name
Spike Walker
Link
Wellcome Images

Imaging

Image Type
recorded image
Imaging Mode
Rheinberg illumination
Parameters Imaged
elastic scattering of photons
absorption of illumination
Source of Contrast
differences in amount of elastic light scattering
differences in intrinsic optical density
Visualization Methods
Rheinberg filters
Processing History
unprocessed raw data

Sample Preparation

Methods
living tissue
Relation To Intact Cell
whole mounted tissue

Dimensions

Spatial Axis Image Size Pixel Size
X 800px ——
Y 561px ——
*CIL – Cell Image Library accession number. Please use this to reference an image.