Fig. 26.24 Cycad coralloid root sections showing the location of endosymbiont cyanobacteria. The
figure shows the ring shaped band of cyanobacteria located inside of a cycad coralloid root. In the
upper image, the cyanobacteria are located wthin a circular band that begins slightly more than half
the distance outward from the center of the root. The lower image shows a higher magnification of
the root cross section, in which the cyanobacteria are visible as tightly clustered small blue dots
within a wide arc that extends from the upper left downward to the lower right. The upper image is
titled “Cycas coralloid root XS low.jpg”. The lower image is titled “Cycas coralloid root XS high.
jpg”. Both of these images are by author Curtis Clark and are being used under a Creative Commons
Attribution-Share Alike 3.0 Unported license
574
C. J. Hurst
figure shows the ring shaped band of cyanobacteria located inside of a cycad coralloid root. In the
upper image, the cyanobacteria are located wthin a circular band that begins slightly more than half
the distance outward from the center of the root. The lower image shows a higher magnification of
the root cross section, in which the cyanobacteria are visible as tightly clustered small blue dots
within a wide arc that extends from the upper left downward to the lower right. The upper image is
titled “Cycas coralloid root XS low.jpg”. The lower image is titled “Cycas coralloid root XS high.
jpg”. Both of these images are by author Curtis Clark and are being used under a Creative Commons
Attribution-Share Alike 3.0 Unported license
574
C. J. Hurst