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<div>Mary,</div>
<div><br></div>
<div>It looks like it, but I'm guessing not. I've seen this in
some lines.</div>
<div><br></div>
<div>I found the image that I was looking for:</div>
<div><br></div>
<div
>http://schnablelab.plantgenomics.iastate.edu/images/research/hypothe<span
></span>sis/cornrootwild.html</div>
<div><br></div>
<div>I've looked at a lot of these roots in my day, and it is true
that in some backgrounds, they tend to grow upwards and appear as if
they're emerging above the scutellum. However, they're really
originating from within the scutellum (or the embryo axis
proper).</div>
<div><br></div>
<div><x-tab>
</x-tab>-Marty</div>
<div><br></div>
<div>At 1:01 PM -0500 6/19/06, Mary (Polacco) Schaeffer wrote:</div>
<blockquote type="cite" cite>Marty,<br>
Here is the photo I sent earlier to Toby and PO-DEV - not sure if it
made it to you, where an embryonic root is emerging from the embryo,
above the scutellar node. Me, I'm no morphology expert, but I did
check with my betters (Leszek, Ed Coe) before bringing this up.<br>
<br>
Image was from Hund et al TAG 109:618-629 (2004) _ root
architecture QTL paper<br>
<br>
It fits with Kiesselbach description, p. 17<br>
[in maize there is a class of lateral seminal roots in maize that come
off the main 'stem':]<br>
"at the base of the first internode of the stem, just above the
scutellar node" (Kiesselbach p.17).<br>
<br>
mary<br>
</blockquote>
<blockquote type="cite" cite>
<hr size="3" width="95%"></blockquote>
<blockquote type="cite" cite><b>From:</b> Marty Sachs
<msachs@uiuc.edu><br>
<b>Reply-To:</b> po-dev@plantontology.org, Marty Sachs
<msachs@uiuc.edu><br>
<b>Date:</b> Mon, 19 Jun 2006 11:57:15 -0500<br>
<b>To:</b> po-dev@plantontology.org, kellogge
<kellogge@msx.umsl.edu><br>
<b>Subject:</b> Re: terms for roots<br>
<br>
Toby,<br>
<br>
This looks fine to me except for:<br>
<blockquote>embryonic root<br>
---is-a primary root<br>
---is-a embryonic nodal root<br>
------is-a seminal root<br>
------is-a root from node<font color="#FF0000"><b> above</b></font>
scutellum<br>
</blockquote>
</blockquote>
<blockquote type="cite" cite><br>
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.<br>
<br>
See: <a
href="http://aob.oxfordjournals.org/cgi/content/full/93/4/359/MCH056F1"
>http://aob.oxfordjournals.org/cgi/content/full/93/4/359/MCH056F1</a><br
>
<br>
<a
href="http://maize.agron.iastate.edu/images/corn/fig1.gif"
>http://maize.agron.iastate.edu/images/corn/fig1.gif</a><br>
<br>
The crown (a.k.a, nodal) roots are the first ones that form above the
scutellem.<br>
<br>
-Marty<br>
<br>
At 11:12 AM -0500 6/19/06, kellogge wrote:<br>
<blockquote>Hi folks -<br>
Mary and I have had a discussion about terms for roots in
maize, which has led to the suggestion of the following terms:<br>
<br>
Under each type of root, she has requested terms defining the central
axis and also the lateral root.<br>
An example for crown root is:<br>
crown root<br>
---part-of central axis of crown root<br>
---part-of lateral root from crown root<br>
<br>
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.<br>
Here's a proposed solution:<br>
embryonic root<br>
---is-a primary root<br>
---is-a embryonic nodal root<br>
------is-a seminal root<br>
------is-a root from node above scutellum<br>
<br>
shoot-borne root<br>
---is-a nodal root<br>
------is-a embryonic nodal root<br>
---------is-a seminal root<br>
---------is-a root from node above scutellum<br>
------is-a prop root<br>
------is-a crown root<br>
<br>
Toby<br>
<br>
Elizabeth A. Kellogg<br>
E. Desmond Lee and Family Professor of Botanical Studies<br>
Department of Biology<br>
University of Missouri-St. Louis<br>
St. Louis, MO 63121<br>
Tel: 314-516-6217; FAX: 314-516-6233<br>
<a
href="http://www.umsl.edu/services/kellogg/"
>http://www.umsl.edu/services/kellogg/</a></blockquote>
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