sporophyte

[planteome-user]

Currently defined as: A plant or phase of a life cycle that bears spores formed by meiosis.

Current place in the ontology: siblings of 'whole plant', along with gametophyte

Child terms: none currently

-On the conference calls on Feb 16th and 23rd, we had fairly extensive discussions of the functionality of keeping gametophyte and sporophyte as
siblings to whole plant.

We agreed that our guiding principles should be:

• have general terms for all structures that would be part_of whole plant

* make is_a children of those specific terms that are specifically parts of gametophyte or sporophyte; for example: female or male gametophyte

Numerous issues were raised such as:
How do we deal with terms that should be under both gametophyte and sporophyte?
For example: a leaf-like structure- phyllome and root-like structures e.g. rhizoids

-also the problem of having term inflation if all the plant structures have to be qualified as either gametophytic or sporophytic??

- gametophyte and sporophyte are really phases of development not plant structures, although botanists are used to referring to the "gametophyte
and sporophyte"

Reported by: cooperl09

Original Ticket: obo/plant-ontology-po-term-requests/68

[planteome-user]

Gametophyte and sporophyte really are NOT just phases of development. They are physical structures. For example, a moss gametophyte is the body of a moss plant composed of haploid cells and a moss sporophyte is a structure composed of diploid cells that produces spores. This is the way those terms have been and are used.

If one wants to refer to a phase of development, it would be better to say gametophytic stage or or phase or generation. It does not make sense to use the term gametophyte to refer to a phase. That's like saying that an embryo is a phase of development.

The current definition of "a plant or phase of a life cycle..." doesn't make sense as something that would be a child of plant structure.

Original comment by: rlwalls2008

[planteome-user]

I thought that we agreed the labels "gametophyte" and "sporophyte" would refer to the pant_structure (and be an is_a child of that term), and that we would use labels such as "gametophyte stage" for the terms that are is_a children of "plant growth stage".

These would be linked via a relation such as "exists_during", e.g. a gametophyte exists_during a gametophyte stage

Original comment by: cmungall

[planteome-user]

Yes, we did agree to this, and I think we should stick with it. All we need to do is make sure the wording of the definitions of gametophyte and sporophyte are appropriate.

Original comment by: rlwalls2008

[planteome-user]

proposed def'n: A plant structure that is a product of fertilization and is capable of forming spores through meiosis.

*need to add the term 'spore' to the ontology

Original comment by: cooperl09

[planteome-user]

Does it make sense to have gametophyte and sporophyte be part_of whole plant, so everything that is part of them, will automatically be part of whole plant? That way they wouldn’t have the is_a link to whole plant that we don’t want, but they would still be logically connected. I realize that there will be implicit part_of links to whole plant for all gametophyte or sporophyte structures through the general terms that are part_of whole plant, but it might make sense to make the link explicit.

Original comment by: rlwalls2008

[planteome-user]

phase of a plant life cycle that is formed by fertiization and produces spores by meiosis.

Original comment by: dws409

[planteome-user]

proposed def'n: A plant structure that is a product of fertilization and produces spores through meiosis.
Comment: the gametophyte arises from the product of meiosis (the spore)

POC Curators (3-16-10)

Original comment by: cooperl09

[planteome-user]

• milestone: --> plant anatomy

Original comment by: cooperl09

[planteome-user]

• priority: 8 --> 1
• status: open --> closed-accepted

Original comment by: rlwalls2008

[planteome-user]

This term is re-opened for comment.

At the POC meeting on 6-30-10, we decided to obsolete the term sporophyte. Will add a whole plant life cycle phase 'sporophytic phase', so structures that only occur in sporophytes can have a participated in (or more specific) relation to sporophytic phase.

Added consider whole plant (PO:0000003) relation.

Original comment by: rlwalls2008

[planteome-user]

• status: closed-accepted --> open-accepted

Original comment by: rlwalls2008

[planteome-user]

This term was rejected (made obsolete).

Original comment by: rlwalls2008

[planteome-user]

• status: open-accepted --> closed-rejected

Original comment by: rlwalls2008