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anther wall #298

Closed planteome-user closed 9 years ago

planteome-user commented 13 years ago

Anther wall (PO:0000002) is part_of pollen sac. Won't work for gymnosperms. Suggest making part_of anther

Current definition (A multicellular layer with outer epidermis and an inner endothecium) is a bit vague.

Suggested defintion: A cardinal organ part that forms the wall of an anther and consists of an outer epidermis and an inner endothecium.

Reported by: rlwalls2008

Original Ticket: obo/plant-ontology-po-term-requests/298

planteome-user commented 13 years ago

Comment from Barry: "What does 'forms' mean?"

Since the word forms is unclear, suggest alternate definition:

A cardinal organ part that is the outer tissue layers of an anther and has as parts an outer epidermis and an inner endothecium.

Original comment by: rlwalls2008

planteome-user commented 13 years ago

Another problem is that anther is not a microsporangium, but rather a part of the stamen and a collection of microsporangia. Therefore, an anther wall is not technically a microsporangium wall.

Two alternative suggestions:

  1. Merge anther wall into a new term '''pollen sac wall''' and keep anther wall as a narrow synonym. Pollen sac wall will be child of microsporangium wall (see separate tracker for sporangium wall). The existing parts of the anther wall would be obsoleted and replaced by "pollen sac exothecium", "pollen sac endothecium", etc.. These terms have multiple annotations for Arabidopsis and maize, but if we use replaced_by, they should transfer easily.

  2. Leave existing terms for anther wall (but make them part of anther, not part_of pollen sac), which is a child of microsporangium wall. Then all annotations for angiosperms would go on anther wall, and annotations for gymnosperms and other heterosporous plants would go on microsporangium wall.

In either case, still need to make anther wall part_of anther, instead of part_of pollen sac.

Original comment by: rlwalls2008

planteome-user commented 13 years ago

Original comment by: rlwalls2008

planteome-user commented 13 years ago

I suggest we go with suggestion #2, because this allows us to preserve the part_of relations, and makes annotaitons easier to deal with.

New definition for anther wall: A microsporangium wall that is part of an anther. Comment: Has an outer epidermis (exothecium) and an endothecium and may have additional layers.

See separate tracker for sporangium wall: https://sourceforge.net/tracker/?func=detail&aid=3297981&group\_id=76834&atid=835555

Original comment by: rlwalls2008

planteome-user commented 13 years ago

Original comment by: rlwalls2008

planteome-user commented 13 years ago

New definition was accepted at the POC meeting on 5-6-11.

closing this item

Original comment by: rlwalls2008