term: columella

[Vincent, Leszek]

Pankaj & colleagues - Please see my comments below - prefixed with XX. -
Leszek

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P. Leszek D. Vincent Ph.D., FLS
Division of Plant Sciences
215 Curtis Hall
University of Missouri-Columbia
Columbia
MO 65211-7020
USA
Ph: (573) 884-3716; Skype VoIP: phytosynergy; Fax:(573) 884-7850;
Email: Leszek at missouri.edu
Associate Curator, Dunn-Palmer Herbarium (UMO);
Research Associate, Missouri Botanical Garden (MO), USA;
Plant Systematist on The Plant Ontology Consortium - NSF award 0321666
(www.plantontology.org)
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-----Original Message-----
From: owner-po-dev at plantontology.org
[mailto:owner-po-dev at plantontology.org] On Behalf Of Pankaj Jaiswal
Sent: Friday, August 05, 2005 10:59 AM
To: po-dev at plantontology.org
Subject: term: columella


<http://www.plantontology.org/amigo/go.cgi?action=query&view=query&searc
h_constraint=terms&query=columella>


Please correct me if I am wrong.

As I understand it the term  PO:0020130 : central root cap is  a region 
in the root cap and its synonym "columella cells" is inappropriate. Also

I see that a similar term  PO:0020132 : columella root cap cell exists, 
so the synonym "columella cells" should actually be added to  PO:0020132

: columella root cap cell and removed from PO:0020130 : central root
cap.

XX I concur with this reasoning in that "central root cap" is a tissue
(a region) etc. & that the synonym would be more appropriate in the
relocated position.


A renaming of the term PO:0020132 : columella root cap cell to "central 
root cap cell" will help, thus maintaining consistency with parent term.

Additional parent term for  PO:0020132 : columella root cap cell is a 
must as follows.

PO:0020130 : central root cap
---part_of--PO:0020132 : columella root cap cell

For consistency the renaming is suggested for  PO:0020133 : columella 
root cap initial to "central root cap initial"

XX I see the renaming issue differently. The term "columella root cap
cell" 'feels' grammatically awkward to me. A preferable form could be
"root cap columella cell" - this conveys the components/complexity of
the compound term a lot better - for me! Furthermore, the revised term
name would convey the desired improved consistency to which you refer.

-----------------------

Just to clarify the usage of word "columella"

My understanding is that the term "columella" is popularly called as : 
The central part of root cap in which the cells are arranged in 
longitudinal files (ref: Essau).  We are using the same definition for 
defining the "central root cap" (syn columella cells) and they are the 
same structure we are talking about.

However there is a confusion by use of the word "columella" in the term 
PO:0020014 "columella"  A rod-like element of the sexine/ectexine, 
either supporting the tectum or a caput.


To make it very clear we are talking about root cap columella in one 
place and pollen wall columella in another can we do the renaming of

PO:0020014 "columella" to "pollen wall columella"

XX This change would be very helpful.

-Pankaj