question on monocot flower development

[jennifer clark]

Hi Jerrold,

Thank you for your comments. I think it would be very interesting to 
consider subgroups within the dicots further down the line. However, 
right now we are just trying to cover the two groups: dicot and monocot. 
We've found in the past that if we try to make large sections of 
ontology covering lots of different species at once then things can get 
so complicated that we never reach the implementation stage. That's why 
we're sticking to solving one problem at a time.

Pankaj has conveyed my question very well below. The motivation behind 
this question is that I need to make the terms: sepal development, petal 
development, stamen development, carpel development, for dicots. I would 
like to know whether the monocot annotators will need a sensu version of 
the same terms, or whether these flower parts would have different names 
in monocots anyway.

Thanks,

Jen






Jerrold I Davis wrote:

> Pankaj:
>
> Through the years, it has often been hypothesized that various floral 
> parts of monocots and dicots (generally perianth parts, as opposed to 
> stamen or pistil) have arisen independently.  This view of things has 
> been strengthened in recent years by the placement of various 
> apetalous taxa as early-divering elements within the dicots.  However, 
> there are also many potential cases of parallel gains and 
> gain/loss/gain events among dicots alone, so I would be wary of any 
> attempt to distinguish monocots from dicots while failing to address 
> equally or more compelling cases within the dicots.
>
> Jerry
>
>
> At 11:16 AM 5/25/2004 Tuesday -0400, you wrote:
>
>> Hi Everyone,
>>
>> I have a question on flower development in Monocots. The reason I am 
>> asking this is because I am working with Gene Ontology group 
>> (www.geneontology.org) to introduce the biological process that 
>> represent a flower development. While doing this we need to 
>> instantiate whether,
>>
>> -It is possible to do most of the gene expression and phenotype 
>> annotation using a generic term or do we need a monocot and dicot 
>> specific term?.
>> -Is there a conceptual difference between the development of a 
>> monocot and dicot flower and its parts? e.g. is there a difference 
>> between a monocot and dicot anther/carpel/petal/sepal/tepal development.
>>
>>
>> Thanks
>> Pankaj
>
>
>
> ______________________________
>
> Jerrold I Davis
> Associate Professor
>
> Department of Plant Biology
> (office: 214 Plant Science Building)
> (mailing address: 228 Plant Science Building)
> Cornell University
> Ithaca, New York 14853
> U.S.A.
>
> phone:   607-255-7980
> fax:     607-255-5407
> e-mail:  JID1 at cornell.edu
> ______________________________
>
>