terms for roots

[Marty Sachs]

Toby,

This looks fine to me except for:

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

These roots which are also called 'secondary roots' or 'lateral 
seminal roots' are actually from the scutellar node, not from a node 
above the scutellum.

See: http://aob.oxfordjournals.org/cgi/content/full/93/4/359/MCH056F1

http://maize.agron.iastate.edu/images/corn/fig1.gif

The crown (a.k.a, nodal) roots are the first ones that form above the 
scutellem.

	-Marty

At 11:12 AM -0500 6/19/06, kellogge wrote:
>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/
>This message is for the designated recipient(s) only and may contain 
>privileged or confidential information.  If you received it in 
>error, please notify the sender immediately and delete the original. 
>Thank you.
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