spatial terms

[Pankaj Jaiswal]

Toby Kellogg wrote:
> I think we need to think hard about what will be gained or lost by
> including terms like first second third leaf.   The conventions on counting
> are different in different plants (e.g top down vs. bottom up), and leaves
> with the same number may or may not be comparable.  Even among maize
> inbreds there is variation in the number of leaves before the
> juvenile/adult transition and before flowering.  I'd suggest that such
> numbering schemes fall into species-specific ontologies and therefore
> should be excluded from the general plant ontology.  Perhaps this is
> something we should discuss at our May meeting.
> Toby
> 

I agree with Leonore and Toby on how you count the numbers and how many 
numbers, based on the germplasm/variety/population type and the species. 
Looks like we need to comeup with a solution soon. I know in majority of 
the rice reports the counts are from the top, because often researchers 
do not see the 1st and 2nd internode/node.

To make things simple we can always say that gene-x is expressed in 
internode. But then we loose the granularity we want to suggest to our 
user that look the gene is expressed in Second internode ONLY. This is 
different than assigning it to the generic term internode.

I think this issue will keep coming up every now and then, because at 
Gramene we do not want to maintain two different ontology sets. I guess 
the same goes with TAIR and MaizeGDB. A generic one  from POC and 
species specific from our own databases. This is too much of work and 
was also the main reason why we wanted to have this project.

Pankaj


> 
>>Depends on how you are defining the first leaf- doesnt it.
>>Counting from first leaf after the cotyledon (which may or may not be
>>formed in the embryo prior to dessication)...
>>Leonore
>>
>>On Mon, 22 Mar 2004, Pankaj Jaiswal wrote:
>>
>>
>>>Hi Everyone,
>>>
>>>I just now started working on the leaf section and encountered the
>>>problem on how do we represent the spatial organization. Since
>>>PATO/phenotype attribute ontology is way off from implementation what
>>>are our rules on this.
>>>
>>>here are a few spatial attribute examples which I think are necessary to
>>>describe a gene's transcript/protein expression profile or a phenotype.
>>>
>>>
>>>first
>>>second
>>>third
>>>fourth
>>>fifth
>>>	e.g.
>>>	first leaf
>>>	second leaf
>>>	first / second internode
>>>	first / second node
>>>basal
>>>uppermost ; synonym:topmost
>>>lower
>>>upper
>>>	e.g.
>>>	basal / uppermost internodes
>>>	topmost leaves
>>>	lower floret
>>>	upper floret
>>>primary
>>>secondary
>>>	e.g.
>>>	primary / secondary panicle branches
>>>	spikelets of the primary branches
>>>
>>>