You are not currently logged in.
Access JSTOR through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Developmental Anatomy of Coralloid Roots in Cycads
American Journal of Botany
Vol. 62, No. 5 (May - Jun., 1975), pp. 468-472
Published by: Botanical Society of America, Inc.
Stable URL: http://www.jstor.org/stable/2441953
Page Count: 5
You can always find the topics here!Topics: Algae, Plant roots, Endosymbionts, Lenticels, Periderm, Adventitious roots, Extracellular space, Root tips, Botany
Were these topics helpful?See somethings inaccurate? Let us know!
Select the topics that are inaccurate.
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
Coralloid roots of cycads were found to originate endogenously from the pericycle of apogeotropic secondary roots or adventitious roots that have become exposed or nearly exposed to the soil surface. All mature coralloid roots are susceptible to infection by algal endophytes, which seem to enter from the soil through a break in the dermal layers. In the coralloid roots the algae inhabit intercellular spaces in a definite zone that arises from the protoderm, and in which the cells elongate radially following algal infection. The zone is completely surrounded by a persistent rootcap which is interpreted by most authors as a secondary cortex. The secondary cortex was shown to be derived from the rootcap in this investigation.
American Journal of Botany © 1975 Botanical Society of America, Inc.