term: columella

[Pankaj Jaiswal]

<http://www.plantontology.org/amigo/go.cgi?action=query&view=query&search_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.

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"

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

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"

-Pankaj