terms for fruit development stages

[Pankaj Jaiswal]

Can we discuss this in Today's call.

Looks like the fertilization is not the correct usage based on the 
definition. The actual fertilization is mating of gametes. The processes 
defined in the definition are covered in Pollination as suggested by 
Sheila McCormick from UC Davis, when we last contacted her while 
creating the terms in Gene Ontology.
Take a look at pollination process as defined in GO
http://www.godatabase.org/cgi-bin/amigo/go.cgi?action=plus_node&depth=1&search_constraint=terms&query=GO:0009856&session_id=891b1145025473


Here is something from GO that we can consider for fertilization stage.

term: Double fertilization
GO:0009567
Definition: Fertilization where one of the two sperm nuclei from the 
pollen tube fuses with the egg nucleus to form a 2n zygote, and the 
other fuses with the two polar nuclei to form the 3n primary endosperm 
nucleus and then develops into the endosperm. The ploidy level of the 2n 
zygote and 3n primary endosperm nucleus is determined by the ploidy 
level of the parents involved.



Peter Stevens wrote:
> Nama is really talking about what goies on before the actual act of 
> double fertilisation, or at least double fertilisation is at the very 
> end of his whole process of fertlisation.
> 
> P.
> 
> 
>> Hi Naama,
>> Double fertilization is already in GO:
> 
>> "double fertilization (sensu Magnoliophyta)'
>> GO:0009567
> 
>> Can you use this term? At POC, we agreed to avoid duplication of terms
>> with Gene Ontology.
> 
>> Katica
> 
>> On Mon, 3 Apr 2006, Naama Menda wrote:
> 
>> > I need the following terms for annotating tomato genes expressed during
>> > different fruit development stages:
>> >
>> > -fertilization: The stage of successful pollen germination, 
>> penetration, and
>> > growth of the pollen tube in the stylar tissue towards the ovule and 
>> into the
>> > embryo sac for fusion with the egg cell. Dbxref PMID:12271039
>> >
>> > -fruit cell division: The initial stage of fruit development 
>> triggered in the
>> > fruit primordia. Dbxref PMID:12271039
>> >
>> > -fruit cell expansion: The stage of increase in cell volume, 
>> contributing
>> > mostly to fruit growth. Dbxref PMID:12271039
>> >
>> >
>> > Thanks
>> > -Naama Menda
>> >
> 
>> --
>> --------------------------------------------------------------------------
>> Katica Ilic                             katica at acoma.stanford.edu
>> The Arabidopsis Information Resource    Tel: (650) 325-1521 ext. 253
>> Carnegie Institution of Washington      FAX: (650) 325-6857
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>> U.S.A.
>> --------------------------------------------------------------------------
> 
> 


-- 
Pankaj Jaiswal
G-15, Bradfield Hall
Dept. of Plant Breeding and Genetics
Cornell University
Ithaca, NY-14853, USA

Ph. +1-607-255-3103 / 4199
fax: +1-607-255-6683