terms for roots

[kellogge]

Hi folks -
   Mary and I have had a discussion about terms for roots in maize, 
which has led to the suggestion of the following terms:

Under each type of root, she has requested terms defining the central 
axis and also the lateral root.
An example for crown root is:
crown root
---part-of central axis of crown root
---part-of lateral root from crown root

She has also run into the problem that grass embryos are well enough 
differentiated to have multiple nodes, such "nodal root" can apply 
within the embryo as well as on the germinated plant.
Here's a proposed solution:

embryonic root
---is-a primary root
---is-a embryonic nodal root
------is-a seminal root
------is-a root from node above scutellum

shoot-borne root
---is-a nodal root
------is-a embryonic nodal root
---------is-a seminal root
---------is-a root from node above scutellum
------is-a prop root
------is-a crown root

Toby

Elizabeth A. Kellogg
E. Desmond Lee and Family Professor of Botanical Studies
Department of Biology
University of Missouri-St. Louis
St. Louis, MO 63121
Tel: 314-516-6217; FAX: 314-516-6233
http://www.umsl.edu/services/kellogg/
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