term: columella

[Pankaj Jaiswal]

Peter Stevens wrote:

> Seems OK to mre, but I would suggest not having "pollen wall coluella" 
> as the name of the term: if we are in the pollen wall part of the 
> ontology, "columella" alone will do the trick if the root "columella" 
> has been obsoleted.  Applying any principle of qualifying terms based on 

The root columella is not obsolete, we have renamed the term to 
PO:0020130 : central root cap.


> the particular part of the plant where they are to be found will 
> ultimately lead to wholesale "renaming" of terms. However, there is also 
> a term "columella" used in fruits that applies to the central axis that 
> persists after the rest of the fruit wall has separated and/or fallen 
> off.  If we were to keep this term, then qualification might be needed, 
> but again, one would be be in a totally different part of the ontology - 
> qualification would then be driven by the needs of our particular 
> controlled vocabulary....
> 

The example given by you is an excellent one considering the ambiguous 
usage of the anatomical terms in the classical literature. Therefore to 
me, it is more or less suggesting us to create the terms with their 
anatomical location attributes (pointing to the composite terms). This 
is so because even though the definition and the parent-child 
relationships in an ontology tree, make a term unique if the same term 
name is used, it is often confusing for the users if they are looking at 
the term only and not at the definition or the term's lineage. Often the 
stand alone terms are easy to suggest what they are based on their 
uniqueness, but not always as in the case of columella.



> P.
> 
> 
>>
>> <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
> 
> 
>