gamete (PO:0025006)

[planteome-user]

I was wondering why there is no gamete term in PO. Sperm cell and egg cell are part of children of male and female gametophyte, respectively, but they are not siblings under a common parent 'gamete'. Was this term not deemed necessary?

Thanks,

Tanya

Reported by: tberardini

Original Ticket: obo/plant-ontology-po-term-requests/58

[planteome-user]

I agree that it should be added. Pending approval by the rest of the group, I am planning to add gamete to the ontology (is_a parent, plant cell).

Original comment by: rlwalls2008

[planteome-user]

Per our discussion of 2-23-2010, sperm and egg are not plant cells, but nudlui with a plasma membrane. We will have to come up with a new parent term.

Original comment by: rlwalls2008

[planteome-user]

its an oversight. We must add it

Original comment by: jaiswalp

[planteome-user]

You mean that sperm cells and egg cells are not plant cells as currently defined by PO , right?

Original comment by: tberardini

[planteome-user]

They are surely some type of cell. I believe we will class them as cells in the CL.

-- Alex

Original comment by: addiehl

[planteome-user]

What I meant was that they do not fit with the current definition of plant cell (which is not yet published), because they have no cell wall.
I also meant to write nuclei, not nudlui.

Original comment by: rlwalls2008

[planteome-user]

We need to write a definition for gamete.
From Raven, Evert and Eichorn: A haploid reproductive cell.
Possible PO defn: A plant cell that is haploid and fuses with another haploid cell during sexual reproduction.

Original comment by: rlwalls2008

[planteome-user]

a cell or a nucleus with haploid genome. Considering we are looking at teh sperm nucleus/sperm cell in angiosperms as well
http://plantontology.org/amigo/go.cgi?view=details&search\_constraint=terms&depth=0&query=PO:0000084

A gamete is not always a cell, But definitely has a nucleus.

Other option is

the male sperm cell (or sperm cell) and the female egg cell.

then also add children

gamete
--is_a--migrogamete
------is_a sperm cell
--is_a--megagamete
------is_a--egg cell

Original comment by: jaiswalp

[planteome-user]

Pankaj,

When is a gamete not a cell? I need to know for the correct treatment in the CL. Cell types in PO and CL should ideally match each other, and certainly we need to correct and improve the CL for plant cells.

Thanks,

Alex

Original comment by: addiehl

[planteome-user]

New def'n:
A plant cell that has half the chromosome complement of the sporophyte and is capable of fertilization to create a zygote.

Original comment by: nobody

[planteome-user]

New def'n: Gamete
A plant cell that has half the chromosome complement of the sporophyte and is capable of fertilization to create a zygote.

(from the POC conference call 3-3-10)

Original comment by: cooperl09

[planteome-user]

Final def'n: gamete
A plant cell that has half the chromosome complement of the sporophyte and is capable of fertilization to create a zygote.

We all agreed that 'gamete' should be a child of 'plant cell' and to make it the parent term of 'egg cell' and 'sperm cell'
(POC conference call 3-9-10) so I am closing this term.

Original comment by: cooperl09

[planteome-user]

Moved to be is_a native plant cell and updated the def'n:
gamete: PO:0025006
A native plant cell (PO:0025606) that has half the chromosome complement of the sporophyte and is capable of fertilization to create a plant zygote (PO:0000423).

Original comment by: cooperl09

[austinmeier]

see #610 for extended discussion