fruit section

[Elizabeth Kellogg]

Hi Pankaj -
    The problem is that not all legumes dehisce, and the ones that do  
dehisce do not all do it in the same way - some dehisce along one  
suture, some along both, and some dehisce between the seeds.  The term  
"legume" can only be defined strictly as "the fruit of a member of  
Leguminosae."   That's why it ends up as an instance only of fruit and  
not of "seed as dispersal unit."
   The TPR violation comes from the attempt to include a time axis  
(development) in a structural ontology, along the lines that we were  
discussing last week.   The relationships are not intrinsically  
hierarchical.  We could create "floret gynoecium", but following the  
same logic we might also have to create a separate term for every sort  
of gynoecium that developed into a different kind of fruit.   But I  
don't quite understand the example you've given below.  Aren't there  
other instances of fruit, including indehiscent ones?  I think the TPR  
violation in the example below comes from reading down the hierarchy.   
Presumably if you included indehiscent fruits then you could trace a  
true path from caryopsis up to floret.  (I think....)
Toby

On May 10, 2004, at 1:25 PM, Pankaj Jaiswal wrote:

>
> Hi,
>
> I have some comments on fruit section
>
> -term "legume" is currently  a direct instance of fruit. Do you think  
> it should be placed as an instance of term "seed as dispersal unit",  
> which is an instance of dehiscent fruit.
> -do we need all the instances of (sort of attributes) of capsule, e.g.  
> loculicidal, septicidal etc. I know the exclusion of "septifragal"  
> will be difficult because of the following comment. Is there a way  
> out?
> -people may like to see "slilique" as a primary term compared to a  
> synonym for "septifragal"
> -a possible TPR violation..
> 	generic term gynoecium appears under floret and this may cause TPR  
> violation because not all the fruit types develop from  "floret  
> gynoecium" (newly coined term). It's only the "caryopsis" which  
> develops from gynoecium in the floret. We need a resolution on this.
>
> may be we need to pull back the relationship
> fruit  develops from gynoecium
>
> One such example is slilique appearing under floret..
>
> http://brie.cshl.org:8080/amigo/go.cgi? 
> action=replace_tree&search_constraint=terms&query=PO:0020072
>
>      <inflorescence branch ; PO:0009081 ; synonym:coflorescence
>       %spikelet ; PO:0009051
>        <floret ; PO:0009082
>         <gynoecium ; PO:0009062 ; synonym:pistil < flower ; PO:0009046  
> % reproductive structures ; PO:0009083
>          ~fruit ; PO:0009001 % mature dispersal unit ; PO:0009091
>           %dehiscent fruit ; PO:0020064
>            %seed as dispersal unit ; PO:0020081
>             %capsule ; PO:0020067
>              %septifragal ; PO:0020072 ; synonym:silicula ;  
> synonym:siliqua ; synonym:silique
>
>
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/divisions/artscience/biology/Kellogg/Kellogg/ 
home.html