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on the links below to see the larger images. |
Cells! is
produced by R. Howard Berg as an educational public service of the
Danforth Center. This tool makes available images of cellular
structures for use in teaching. Use the left-hand menu or browse
through the larger images below. The
images shown were produced using instrumentation in the
Integrated
Microscopy Facility
at the Danforth Center
and
illustrate a variety of cellular characteristics and structures.
You
may copy and use the images for educational purposes only, free of charge.
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Abbreviations:
G=Golgi stack; M=mitochondrion;
Mt=microtubule;
N=nucleus;
Nu=nucleolus; P=plastid;
Pl=plasma membrane; T=tonoplast;
V=vacuole;
W=plant cell wall |
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chloroplast
1 |
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You can use the thumbnails
on the left
or click on the word(s) above to navigate to images.
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These images
are copyrighted to the Danforth Center and are not to be
sold
or published without the written permission of the Danforth
Center.
We would
like to acknowledge the support of the National Science
Foundation as the
source of funds to purchase the instruments used in making these
images.
Light micrographs were made
using a Zeiss LSM 5210 Meta NLO confocal/multiphoton
system and are of
living cells. |
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Electron
micrographs were made using a Leo 912 AB transmission electron
microscope.
These thin section images are of samples that were
physically fixed by ultra-rapid freezing
(about 15 milliseconds) in a
high pressure freezer, which prevents ice crystal formation
which
otherwise would destroy cell structure. Compared to chemical
fixation, ultra-rapid
fixation produces the most life-like images
currently possible in electron microscopy. |
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This image shows chloroplasts in
living cells. The green color is due to chlorophyll fluorescence
in this 3-D reconstruction from multiphoton optical sectioning. If
one could see the cell walls, it would be apparent that the chloroplasts
are grouped in several cells here, generally in circles surrounding a
central vacuole. The diameter of a chloroplast is about five
micrometers.
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